Northeastern Region Licthic Materials

Materials Identification Guide

Northeastern Region Lithic Material

Name	Natural	Non-heat treated points	Heat treated points	Color details	Primary found in:	Associated Formation / Member
Alison Quartzite AKA: Allison Quartzite				Ranges from a green to gray or black	Labrador, Quebec	Alison Quartzite Formation of the Kaniapiskau Supergroup
Allentown Chert				Ranges from a medium to dark gray with white streamers with banding commonly present. Oolitic and stromatolitic.	Pennsylvania, New York, New Jersey, Vermont	Allentown Formation
Allentown Quartzite				Ranges from a very light gray to a medium light gray.	Pennsylvania, New York, New Jersey, Vermont	Allentown Formation
Alsen Chert				Mottled dark gray to a dark brownish gray.	New York, Maryland, New Jersey, Pennsylvania, Virginia, West Virginia, Vermont, Massachusetts, Connecticut	Alsen Cherty Limestone Formation of the Helderberg Group
Amabel Formation Chert				White lacking luster	Ontario, Michigan, New York	Amabel Dolomite Formation
Ancaster Chert AKA: Lockport Chert and Goat Island Chert				Mottle light to medium gray with inclusions of lighter quartz. Commonly rusty stains.	Ontario, Michigan, New York	Goat Island Member of the Lockport Formation
Antietam Quartzite AKA: Erwin-Antietam Quartzite				Ranges from bright white to light gray, tan, brown, pink, or red, a greenish brown variation is reported	West Virginia, Virginia, Delaware, Maryland, Pennsylvania, New Jersey	Antietam Formation of the Chilhowee Group
Aquia Orthoquartzite				Ranges from white to tan, light gray, or brown. Finer grain can range from tan to brown, gray, yellow, or red.	Delaware, Maryland, Pennsylvania, Delaware, New Jersey	Aquia Quartzite Formation
Ashburn Hornfels				Colors of white, gray, and light green and is massively spotted.	New Brunswick	Ashburn Formation
Ashburn Quartzite				White	New Brunswick	Ashburn Formation
Argillite (Generic type)				Light to dark green, but may range to various shades of gray.	North America	Varies
Attleboro Red Felsite AKA: Wamsutta Rhyolite				Very dark reddish brown	Massachusetts, Rhode Island	Wamsutta Formation
Bald Eagle Jasper AKA: Houserville Jasper				Mottled with shades of light or medium yellow	Pennsylvania
Barker Quartzite				Light green when freshly fractured and weathers to a light or white color	Vermont, New York	Barker Quartzite Formation
Barrington Argillite				Gray	Rhode Island, Massachusetts
Baskahegan Lake Quartzite				Light gray to light green	Maine, New Brunswick	Baskahegan Lake Formation
Battie Quartzite				Clean buff colored	Maine	Battie Quartzite Formation
Beacon Hill Gravel Chert / Quartzite				Nodules of chert and yellow quartzite.	Maryland, New Jersey	Beacon Hill Formation
Beaver Run Chert				Dolomite is a sparkly black which emits a fetid odor when struck with black and knotted chert occur.	New Jersey, Pennsylvania, New York	Beaver Run Dolomite Member of the Ontelaunee Formation
Becraft Chert				Light bluish gray to medium gray or black	New York, New Jersey, Maryland, and Virginia	Becraft Limestone Formation of the Helderberg Group
Beekmantown Chert AKA: Narrows Chert				Dark gray often fossiliferous.	West Virginia, Virginia, Maryland, Pennsylvania New Jersey, New York, Massachusetts, Vermont	Beekmantown Geological Group
Belle Lake Chert				Laminated red chert	New Brunswick, Maine	Belle Lake Formation
Bellefonte Chert				Ranges from a light to medium gray	Pennsylvania, Maryland, West Virginia, Virginia	Bellefonte Dolomite Formation of the Beekmantown Group.
Belleville Chalcedony				Ranges from a black to a dark brown in color. Veins and inclusion of white quartz are sometimes present	Pennsylvania
Ben Lomond Chert				Ranges from a gray to light brown.	New Brunswick	Ben Lomond Formation of the Coldbrook Group
Blue Hills River Felsite / Rhyolite					Massachusetts, New Hampshire
Blueberry Mountain Argillite				Banded and ranges from bluish black to black or dark gray.	New Hampshire	Blueberry Mountain Series
Berea Sandstone				Ranges in color from a light gray to a buff	Ohio, Michigan, Pennsylvania, West Virginia, and Kentucky	Waverly Group
Boggs Chert AKA: Blunt Run Chert				Ranges in color from a dark gray to black with numerous white or light colored speckles from fossils	Ohio, Pennsylvania, West Virginia	Boggs Member of the Pottsville Formation
Bois Blanc Formation Chert				Color ranging from almost white to grays, browns, and blues	Ontario, Michigan, Wisconsin, New York	Bois Blanc Formation Limestone
Bonnecherre Chert				Ranges from black to light grey with darker fine banding and quartz vug	Ontario and Quebec	Hull Formation of the Ottawa Group
Braintree Hornfels				Varies from a medium to dark gray	Massachusetts, Connecticut	Braintree Argillite Formation
Branchville Chert				Medium to dark gray weathering a reddish brown to buff.	New Jersey, Pennsylvania, New York	Branchville Member of the Epler Formation, Beekmantown Group
Briarcliff Chert				Light with darker patches.	New York, Pennsylvania, New Jersey, Massachusetts, Connecticut	Briarcliff Dolomite Formation of the Wappinger Group
Brandywine Blue Gneiss AKA: Wilmington Blue Rock				Ranges from a bright blue to a bluish gray.	Delaware, New Jersey, Pennsylvania, Maryland	Brandywine Blue Gneiss Formation of the Wilmington Complex
Breakeyville Orthoquartzite				Very quartz rich sandstone forming an orthoquartzite.	Quebec	Breakeyville Formation of the Sillery Group
Broad Run Chalcedony AKA: Wissahickon Schist				Ranges in color from a mottled white to light gray or cream to yellow. Black specks are present through the material.	Virginia, Delaware, Maryland, Pennsylvania, New Jersey	Wissahickon Formation
Brunswick Mudstone / Siltstone				Primarily a dark red, but colors of purple, green, yellow, gray, and black also occur.	New York, New Jersey, Pennsylvania	Passaic Formation (formerly Brunswick Formation) of the Newark Group
Brush Creek Chert AKA: Crooksville Chert, Hughes River Chert				Varies in color from a tan to a brown olive or light green	Ohio, Pennsylvania, West Virginia, and Kentucky	Conemaugh Group
Buttermilk Falls Chert				Ranges from a dark gray to black.	Pennsylvania, New Jersey, New York	Buttermilk Falls Member of the Onondaga Limestone Formation
Cabot Head Chert AKA: Bruce Chert				Ranges in color from shades of white to a light gray.	Ontario, Michigan, New York	Cabot Head Member of the Cataract Formation
Califon Chert				Ranges in color from black to gray or bluish gray or orange to brown and typically stained green from limonite.	New Jersey, Pennsylvania, New York	Califon Member of the Leithsville Formation
Cannel Coal				Ranges from dark gray to black	Kentucky, Pennsylvania, West Virginia, Texas, and Nova Scotia.
Canoe Landing Lake Chert				Red	New Brunswick	Canoe Landing Lake Formation of the California Group
Cape Blomidon Agate AKA: Bay of Fundy Chalcedony, North Mountain Chalcedony				Shades of white, blue, brown, tan, yellow, red, and purple. Fortifications and banding commonly occurs.	Nova Scotia	North Mountain Formation basalts
Cape Elizabeth Quartzite AKA: Elizabeth Quartzite				Ranges from a white to a light yellow or light gray.	Maine	Cape Elizabeth Quartzite Formation
Carbaugh Run Rhyolite					Pennsylvania
Catoctin Greenstone AKA: Catoctin Metabasalt				Ranges from a green to a greenish gray or gray.	Virginia, West Virginia, Maryland, Pennsylvania, Delaware	Catoctin Formation
Catoctin Metarhyolite AKA: Highland Metarhyolite				Ranges from a gray to a bluish gray, blue, or purple. Banding, mottling, or breccia with a tannish color may be present.	West Virginia, Virginia, Delaware, Maryland, Pennsylvania	Catoctin Formation
Carrabassett Metamorphic Quartzite				Dark gray when freshly fractured weathering to a medium gray.	Maine, Quebec	Quartzite member of the Carrabassett Formation
Castine Dactite / Rhyolite				Light colored	Maine	Castine Volcanic Formation
Cecil Black Chert AKA: Newark Chert				Ranges from a medium gray to black	Delaware, Maryland, Pennsylvania, New Jersey	Newark Gabbro Formation
Cedar Camp Brook Chert				Ranges from a gray or green to black weathering to a light gray or light brown.	New Brunswick	Cedar Camp Brook Formation
Chaumont Chert AKA: Watertown Chert, Leray Chert				Ranges from a dark gray to black.	New York,	Watertown Member of the Chaumont Limestone Formation
Chepultepec Chert (Ridge and Valley Chert)				Ranges from yellow to white and oolitic	Georgia, North Carolina, South Carolina, Alabama, Tennessee, Virginia, Maryland, West Virginia, Pennsylvania	Chapultepec Member of the Knox Formation
Cherry Valley Silicified Shale				Ranges from a medium gray to a sooty black	New York, Pennsylvania	Cherry Valley Shale Member of the Marcellus Formation of New York
Chert de Kitchispi AKA: Deschambauklt Chert				Ranges from a medium to dark gray or black to a light brown.	Quebec	Deschambault Formation of the Trenton Group
Cheshire Quartzite AKA: Stissing Quartzite				Ranges from a white to a light gray or a tannish gray	New York, Connecticut, Rhode Island, Massachusetts, Vermont
Chickies Quartzite AKA: Chiques Quartzite, Hellam Quartzite, Edge Hill Quartzite				Ranges from white to gray or tinted pink, tan, green, or blue	Pennsylvania, Maryland	Chickies Formation
Chuctanunda Creek Chert				Ranges from a dark gray to black.	New York	Chuctanunda Creek Dolomite Formation of the Beekmantown Group
Clarks Ferry Siltstone				Yellowish gray	Pennsylvania	Clarks Ferry Member of the Catskill Formation
Clough Quartzite				Ranges from white to a light pink.	Connecticut, Massachusetts, Vermont, New Hampshire	Clough Quartzite Formation
Coeymans Chert AKA: New Creek Chert				ranges in color from a bluish black to black. Cloudy patches of fine pyrite and quartz may be present.	New York, Maryland, New Jersey, Pennsylvania, Virginia, West Virginia, Vermont, Massachusetts, Connecticut	Coeymans Limestone Formation (New Creek Formation), Helderberg Group
Cohansey Orthoquartzite				Base color of grayish white with mottled colors including yellow to brown, orange to red, or black	Maryland, New Jersey, Pennsylvania	Cohansey Formation
Colchester Jasper				Mottled red and mustard yellow color with white quartz running through the material.	Vermont, New Hampshire	Monkton Formation
Colborne Chert Bois Blanc Variant AKA: Port Colborne Chert				Light bluish grey color	Ontario, Michigan, Wisconsin	Bois Blanc Formation
Conococheague Chert				Ranges from a gray to a bluish gray, brownish gray, or black. Small blue to white inclusions may be present.	Virginia, Tennessee, West Virginia, North Carolina, Maryland, Pennsylvania	Conococheague Limestone Formation
Copper Ridge Chert (Ridge and Valley Chert)				Ranges in color from medium to dark gray to black	Georgia, North Carolina, South Carolina, Alabama, Tennessee, Virginia, Maryland, West Virginia, Pennsylvania	Copper Ridge Member of the Knox formation
Coshocton Chert Upper Mercer Chert variation				Ranges from a medium gray to a dark bluish gray with bands of various shades of blue, commonly has bands of white quartz	Ohio, Michigan, Ontario, Pennsylvania, and New York	Upper Mercer Limestone of the Pottsville Formation
Coxsacki Chert				Ranges from a mottled grayish green to a dark green gray	New York
Craig Brook Chert				Black	New Brunswick	Craig Brook Limestone Formation
Crown Point Chert				Dark bluish black	Vermont, New York, Quebec	Crown Point Limestone Formation of the Chazy Group
Crystal Quartz				clear colorless stone similar to clear glass	Eastern North America
Cuesta Quartzite				Ranges in color from pale grayish brown, pink, or reddish.	Delaware, New Jersey
Cutting Chert AKA: Thompson's Point Chert				Ranges from dark gray to black	New York, Vermont	Cutting Dolomite Formation of the Beekmantown Group
Eagle Bridge Quartzite				Compact gray color	New York	Eagle Bridge Quartzite Formation
Edgecliff Chert AKA: Clarence Chert				Mottled black, gray, and white with black spots	Pennsylvania, New York, Ontario	Edgecliff member of the Onondaga Formation
Edmund Hill Ansite (Augite Andesite)				Ranges from a medium to dark gray with phenocysts inclusions.	Maine	Edmund Hill Andesite Formation
Elmtree Chert				Dark gray and red chert	New Brunswick	Elmtree Formation
Epler Chert / Dolomite				Ranges from a medium to dark gray.	Pennsylvania, New York, New Jersey	Epler Formation of the Beekmantown Group
Eramosa Chert				Ranges from light to medium gray or brown gray	Ontario, New York	Goat Island Member of the Lockaport Formation
Esopus Chert / Silicified Shale AKA: Cherry Valley Chert, Bowmanstown Chert				Ranges from a dark gray or brown to a brownish black or black.	Pennsylvania, New York, New Jersey	Esopus Member of the Onondaga Limestone Formation.
Flemming Chert				Ranges in color from white to shades of tan or gray to black. It is mottled and commonly banded.	Labrador, Newfoundland, Quebec	Fleming Formation
Flemming Chert Breccia				Fractured gray and black chert in a gray quartzite matrix.	Labrador, Newfoundland, Quebec	Fleming Formation
Flemming Quartzite				Gray	Labrador, Newfoundland, Quebec	Fleming Formation
Flint Ridge Chert /Chalcedony AKA: Van Port, Raccoon Creek Chert				White to bluish hues with bands of light gray, reds, and yellows	Ohio, Michigan, Ontario, Indiana, Kentucky, West Virginia, Pennsylvania, New York	Van Port Member of the Allegheny Formation
Fort Ann Chert				homogenous dark gray to bluish gray or black.	New York, Vermont	Fort Ann Formation of the Beekmantown Group
Fossil Hill Chert AKA: White Chert				Ranges in color from off white to bluish white. Hues include red, pink, yellow and green. Speckled with oxides and quartz	Ontario, New York, Michigan	Fossil Hill Limestone Formation
Gailor Chert				Gray	New York	Gailor Dolomite Formation of the Beekmantown Group
Gettysburg Siltstone AKA: Hammer Creek Siltstone				Ranges from a reddish brown to maroon	Pennsylvania, Maryland, New Jersey, New York	Gettysburg Formation (Hammer Creek Formation) of the Newark Group
Glenerie Chert AKA: Port Jervis Chert				Ranges from a bluish gray to black weathering brown.	New York, New Jersey	Glenerie Formation of the Onondaga Group
Green Mountain Jasper AKA: Vermont Jasper				Bright red	Vermont
Gull River Chert (Upper) AKA: Trent Valley Chert				Ranges from black or blackish blue with lenticular cream or light tan mottling	Ontario, New York, Pennsylvania	Gull River Limestone Formation
Halcyon Lake Chert				Ranges from white to yellow or cream.	New York	Halcyon Lake Formation of the Wappinger Group
Haldimand Chert Bois Blanc Variant				Ranges from a light gray to a light tan cream color	Ontario, Michigan, Wisconsin, New York	Bois Blanc Formation
Hamburg Chert				Ranges in color from blue to black with white quartz veins running through the material.	New York, New Jersey	Hamburg Member of the Leithsville Formation
Hanford Brook Vein Quartz				Ranges from a milky white to clear.	New Brunswick	Hanford Brook Formation
Hardyston Chalcedony				Semi translucent milky white to light blue or light to gray.	Maryland, Pennsylvania, New Jersey, Delaware, New York	Hardyston Formation
Hardyston Jasper AKA: Berks Jasper, Lehigh Jasper, Pennsylvania Jasper, Reading Prong Jasper				Ranges from a dark golden yellow to a bright red or dark brown with mottling as well as tiny veins of clear to white translucent chalcedony.	Maryland, Pennsylvania, New Jersey, Delaware, New York	Hardyston Formation
Hardyston Quartzite				Ranges from a milky white to light blue to a light yellowish brown or gray.	Maryland, Pennsylvania, New Jersey, Delaware, New York	Hardyston Formation
Harlow Bridge Quartzite				Ranges from a tan to light green	Vermont	Harlow Bridge Quartzite Member of the Moretown Formation
Harmonyvale Chert				Ranges from a gray to a greenish gray	Pennsylvania, New York, New Jersey	Harmonyvale Member of the Ontelaunee Formation
Harvey Rhyolite				Red and green with flow banding commonly present.	New Brunswick	Harvey Formation
Hatch Hill Chert				Bluish black weathering black	Massachusetts	Hatch Hill Formation
Hathaway Chert AKA: St. Albans Chert				Ranges from a homogenous olive green to black or a olive green with black mottling.	Vermont, New York, Quebec	Hathaway Formation
Hayden Lake Chert				Ranges from a red and green ferromanganiferous chert to a black chert.	New Brunswick	Hayden Lake Formation of the Tetagouche Group
Heath Farm Jasper AKA: Delmarva Peninsula Jasper				Ranges from a brownish to dark brownish black.	Delaware, Maryland, Pennsylvania
Helderberg Chert				Ranges from mottled white to light cream, light gray, and light blue commonly mottled and fossiliferous.	New York, Maryland, New Jersey, Pennsylvania, Virginia, West Virginia, Vermont, Massachusetts, Connecticut	Helderberg Group
Hingham Felsite				Ranges from a deep red to purple with banding with dull yellow inclusion commonly present as well as small phenocysts.	Massachusetts
Hinkley Point Metasediment				Ranges from a light to medium gray to a greenish gray with whitish spots.	Maine, New Brunswick
Hook Mountain Basalt AKA: Watchung Basalt				Ranges from a light to dark greenish gray amygdaloidal basalt.	New Jersey	Hook Mountain Basalt Formation of the Brunswick Group
Hudson Bay Lowland Chert				Bluish gray to a light tan or pale yellow	Ontario, Saskatchewan, and into Minnesota and Quebec	Severen, Ekwan, and Stooping River formations
Huronia Chert AKA: Lower Gull River Chert				Bluish gray mottled or banded chert with brownish-grey or greyish-beige colors. Chert is commonly speckled with light/dark grey, or grey-black	Ontario, Michigan, Ohio, Pennsylvania, New York	Fontenac Axis Member of the Gull River Formation
Ingonish Island Rhyolite				Dark gray and slightly magnetic	Nova Scotia
Indian Cove Chert					Quebec	Indian Cove Formation of the Gaspé Limestone Group
Indian River Chert				Red and bluish black weathering white.	Vermont, New York	Indian River Slate Formation
Indian River Slate				Variegated deep maroon and bluish green.	Vermont, New York	Indian River Slate Formation
Iron Hill Jasper AKA: Newark Jasper				Ranges from a mottled mustard yellow to brown, dark brown, brownish black, and red.	Delaware, Maryland, Pennsylvania	Newark Gabbo Formation
Jefferson Rhyolite				Flow banded spherulitic rhyolite with colors ranging from pink to olive yellow, or blackish green.	New Hampshire
Kalkberg Chert				Ranges in color from a grayish blue to a black. This chert is heavily cloudy by opaque patches. Clastic quartz is present	New York, Maryland, New Jersey, Pennsylvania, Virginia, West Virginia, Vermont, Massachusetts, Connecticut	Kalkberg Formation of the Helderberg Group
Kanawha Black Chert				Vary from a black to a bluish black /gray to a dark gray	West Virginia and into Pennsylvania, Virginia, Ohio, and Kentucky	Kanawha formation
Kettle Point Chert AKA: Ausabel Chert, Port Franks Chert / Chalcedony				Ranges from a mottled blue gray to a medium gray with darker grayish banding, lighter clouds or streaks are present	Ontario, Pennsylvania, New York	Ipperwash Formation Limestone
Keyser Chert				Mottled gray to brownish gray of black with visible clastic quartz grains.	Pennsylvania	Keyser Formation
Kineo Porphyritic Rhyolite AKA: Kineo Flint, Mount Kineo, Traveler Rhyolite				Ranges from a medium to dark bluish gray or and olive green with phenocysts of felsite and tuff weathering white.	Maine	Kineo Volcanic Member of the Tomhegan Formation, Moose River Group
Kichispi Chert Upper Gull River variant				Continuously banded chert ranging in color from a brownish grey or greyish beige.	Ontario, Quebec, New York	Upper Gull River Formation
Kittatiny Chert				Ranges from a mottled light grayish brown to a dark grayish black with veinlets of light gray chalcedony.	Pennsylvania, New Jersey, New York	Kittatiny Formation
Kittery Quartzite AKA: Cape Elizabeth Quartzite				Ranges from a light brown to light gray.	Massachusetts, Vermont, Connecticut, Rhode Island, Hew Hampshire, Maine, New York, and into New Jersey.	Kittery Formation of the Merrimack Group
Knox Chert				Dark blue to bluish gray with translucent mottling. Red Knox Chert has a reddish color with slight mottling.	Georgia, North Carolina, South Carolina, Alabama, Tennessee, Virginia, Maryland, West Virginia, Pennsylvania	Knox Formation
Lafayette Chert				Ranges from a dark gray to black weathering an orangish gray	New Jersey, Pennsylvania, New York	Lafayette Member of the Epler Formation, Beekmantown Group
Ledge Ridge Chert				Ranges from green to black with some pyrite rhombs.	Maine
Leithville Chert				Ranges in color from black to gray or bluish gray or orange to brown. white quartz veins or staining of green limonite may be present.	New York, New Jersey, Pennsylvania.	Leithville Formation
Leyden Argillite				Dark colored	Massachusetts, Vermont, New Hampshire	Leyden Formation
Libertytown Metarhyolite				Ranges from a dark purplish to a bluish black or red with macrophenocycts of pink and white feldspar.	Maryland, Virginia, West Virginia, Pennsylvania	Libertytown Metarhyolite Formation
Licking Creek Chert				Black with sandy texture inclusions.	Pennsylvania, Virginia, Maryland	Licking Creek Member, Helderberg Formation
Lime Rock Jasper				Ranges from a dark golden yellow to a dark brown with tiny veins of clear to white chalcedony to translucent gray or a homogenous yellow	Rhode Island
Limeport Chert				Ranges from a gray to a bluish gray or black, banding may be present.	Pennsylvania, Maryland, New Jersey	Limeport Member of the Allentown Formation
Little Ascutney Rhyolite				Spherulitic rhyolite.	Vermont, New Hampshire	Little Ascutney Stock - Paisanite (rhyolite) Dike
Little Falls Chert AKA: Knauderack Chert				Most commonly blue, but dark brown to a pearly light blue or small bluish green speckles and milky white. Red jasper also occurs.	Pennsylvania, New York	Little Falls Dolomite Formation
Little River Chert				Ranges from a red and green ferromanganiferous chert to a black chert.	New Brunswick	Little River Formation of the Tetagouche Group
Lockatong Argillite				Primarily a light to dark gray, greenish gray, or black, but a greenish red, grayish purple, or reddish brown may also occur	Pennsylvania, New York, New Jersey	Lockatong Formation, Newark Group
Lockport Chert AKA: Ancaster Chert, Goat Island Chert				Ranges in color from white to a very light white gray	Michigan, Ohio, Ontario, New York	Goat Island Member of the Lockport Formation
Longview Chert				Primarily reddish, but white to gray colors do occur	Georgia, North Carolina, South Carolina, Alabama, Tennessee, Virginia, Maryland, West Virginia, Pennsylvania	Longview Member of the Knox formation
Lower Mercer Chert				Bluish gray color with quartz inclusions.	Pennsylvania, Ohio, Kentucky, West Virginia	Lower Mercer Member of the Pottsville Formation
Lowville Chert AKA: Birdseye Chert				Ranges from a dark gray to black.	New York, Vermont, Quebec, Ontario	Lowville Limestone Formation of the Black River Group
Loyalhanna Chert				Ranges in color from a chalky white, light gray, or light green to greenish brown	Pennsylvania	Loyalhanna Limestone Formation of the Maxwell Group
Macungie Jasper				Ranges from a brownish yellow to a mustard yellow or a brownish red to red. Commonly has veinlets of quartz.	Pennsylvania
Marblehead Felsite AKA: Lynn Rhyolite				Ranges from a dark gray to black with phenocryst inclusions of felsite.	Massachusetts	Lynn Volcanics
Mattapan Felsite					Massachusetts	Mattapan Volcanics
Meadow Mountain Chert				Mottled blue gray with white streaks present.	West Virginia, Maryland, Pennsylvania	Possible Foreknob Formation
Mines Chert AKA: Gatesburg Chert				Medium gray with visible ooids present.	Pennsylvania	Mines Dolomite Member of the Gatesburg Formation
Mistassini Quartzite AKA: Albanel Quartzite				Ranges from a bright white to light gray with medium to dark gray or black streaks or inclusions.	Ontario, Quebec, New York, Vermont, Maine, New Brunswick	Temiscamie Formation of the Mistassini Group
Misery Quartzite				Light gray with tiny veinlets of milky quartz and may be stained red by hematite .	Maine	Misery Quartzite Formation
Mogothy Quartzite AKA: Magothy Quartzite				Ranges in color from gray to bluish gray or purple, banding or mottling may be present. Small fossils may give a peppered appearance.	Virginia, Delaware, Maryland, Pennsylvania	Mogothy Formation
Monkton Quartzite				Ranges from white to light buff on top layers to light shaded of red and pink to brick red or purple. Red jasper also occurs	New York, Vermont	Monkton Formation
Monongahela Chert				Ranges from light to medium gray with limonite staining	West Virginia, Ohio, Pennsylvania	Uniontown Member of the Monongahela Group
Morar Brook Chert				Ranges from a dark gray to black.	Nova Scotia	Morar Brook Formation of the Georgeville Group
Mount Jasper Rhyolite AKA: Neponset Rhyolite				Flow banded spherulitic rhyolite with color ranging from an olive green to brown weathering white.	New Hampshire, Maine	Moat Volcanics
Mount Merino Chert AKA: Athens Hills Chert, Pleasentdale Chert, West Athens Hill Chert				Ranges in color from a dark greenish grey to a dark gray or black.	New York	Mount Merino Formation of the Normanskill group
Munsungun Chert AKA: Munsungun Lake Chert				Diverse coloration ranging from a light gray or greenish gray to black or red weathering to a light tan or gray.	New Hampshire, Maine, New Brunswick, Quebec	Munsungun Formation
Nantasket Argillite				Dark gray to black on freshly fractures surfaces weathering to a tan to pale green or green.	Massachusetts, New Hampshire
Needle Chert AKA: Needle Hornfels, Cap Bon Ami Hornfels				Ranges from a tan or yellowish brown to dark brown or dark gray	Quebec	Cap Bon Ami Formation
Nellie Blue Chert (Upper Mercer Chert variant)				Gray to medium blue and commonly has white streaks	Ohio, Michigan, Ontario, Pennsylvania, New York	Upper Mercer Limestone of the Pottsville group
Nethers Chert Flint Ridge Chert variation AKA: Ribbon Chert				Banded with colors ranging from light gray to black, pink to red, or tan to brown	Ohio, Indiana, Kentucky, West Virginia, Pennsylvania, Michigan, Ontario	Van Port Member of the Allegheny Formation
Newark Jasper AKA: Iron Hill Japer				Primarily a mottled mustard yellow with white quartz inclusions and streaks. Mottled grays may be present.	Pennsylvania, Delaware	Newark Gabbro Formation
New Haven Arkose				Ranges from a pink to red or gray indurated arkose.	Connecticut, Massachusetts, Rhode Island	Hew Haven Formation
New Market Chert AKA: Row Park Chert				Ranges from a dark gray to black.	Virginia, West Virginia, Pennsylvania, Maryland	New Market Limestone Formation of the St. Paul Group
New Scotland Chert AKA: Corriganville Chert, Minisink Chert				Ranges from a white to very light colors.	New York, Maryland, New Jersey, Pennsylvania, Virginia, West Virginia, Vermont, Massachusetts, Connecticut	New Scotland Formation (Corriganville Formation) of the Helderberg Group
Nittany Chert				Ranges from a medium to dark gray with siliceous oolites. Red jasper also occurs in this formation.	Pennsylvania, Maryland, Virginia, West Virginia	Nittany Dolomite Formation, Beekmantown Group
Normanskill Chert AKA: Deepkill Chert, Coxsackie Chert				Range from a light green to a dark green or brownish green with darker bands being present.	Pennsylvania, New York, New Jersey, Connecticut, Massachusetts	Mount Merino and Indian River Formations of the Normanskill Group
North Mountain Basalt				Ranges from dark gray to black	Nova Scotia	North Mountain Formation
Nova Scotia Agate / Chalcedony				Includes banded, breccia, carnelian, fortification, moss, plume, or have eyes.	Nova Scotia	North Mountain Formation basalts
Oak Bay Chert / Vein Quartz				Black chert white vein quartz	New Brunswick, Maine	Oak Bay Formation
Oak Mountain Chert				Red	New Brunswick	Oak Mountain Formation
Onondaga Chert AKA: See page				Vary from light to dark gray to a mottled bluish gray to a dark brown or black or tan.	Ontario, Quebec, New York, Pennsylvania, Jersey, Connecticut, Massachusetts, Vermont	Onondaga Limestone Formation
Ontelaunee Chert / Dolomite				Ranges from a dark gray to black. White chert also occurs.	Pennsylvania, New Jersey, New York	Ontelaunee Formation of the Beekmantown Group
Oriskany Solicified Sandstone				White	New York, Pennsylvania, New Jersey, Maryland, West Virginia, Virginia	Oriskany Sandstone Formation
Orthoquartzite (Generic type)				Varies	North America	Varies
Orwell Chert				Black	Vermont	Orwell Limestone Formation of of the Champlainian Series
Ossipee Rhyolite				Welded tuff	New Hampshire
Patuxent - Mattaponi Quartzite AKA: Mattaponi Quartzite				Range in color from a dark white to gray, cream to yellow, and pink to red.	West Virginia, Virginia, Maryland, Pennsylvania	Patuxent / Mattaponi Formation
Pine Plains Chert				Ranges from a buff to light brown or tan weathering gray.	New York	Pine Plains Formation of the Wappinger Group
Pinesburg Station Chert				Ranges from a white to very light gray.	West Virginia, Virginia, Maryland, Pennsylvania	Pinesburg Station Formation of the Beekmantown Group
Pocono Siltstone				Reddish brown	Pennsylvania, Maryland	Pocono Formation
Popelogan Chert				Dark gray to black carbonaceous chert.	New Brunswick	Popelogan Formation
Port Ewen Chert				Ranges in color from a dark gray to black	New York, Maryland, New Jersey, Pennsylvania, Virginia, West Virginia, Vermont, Massachusetts, Connecticut	Port Ewen Formation of the Helderberg Group
Potsdam Quartzite Quartzitic sandsandstone				Ranges from a tan or cream to pink and rarely is almost black	New York, New Jersey	Potsdam Sandstone Formation of the Saratoga Springs Group
Poughquag Quartzite				Dark bluish gray	New York	Poughquag Quartzite Formation of the Wappinger Group
Poultney Chert AKA: Deepkill Chert				Ranges from white to a light gray.	Vermont, New York	Poultney Slate Formation, Beekmantown Group
Providence Island Chert				Relatively equal amounts of white chert nodules and a dark bluish gray nodules.	New York, Vermont	Providence Island Dolomite Formation of the Beekmantown Group
Quartz				Milky white with thin veins	North America
Quartzite				Varies from white to gray, or pink and tan in color	North America
Ramah Chert AKA: Mugsford Chert				Ranges from a light gray to a frosted white with parallel black bands, black iron inclusions, and orange rust spots commonly present.	Newfoundland, Labrador, Quebec, Nova Scotia, New Brunswick, Maine
Reagen Chert				Black and tan to gray with banding commonly present. Swirls, veins, or mottling may be present.	Vermont
Reynales Chert / Silicified Sandstone AKA: Hickory Corners Chert				Varies in color from a white to light or medium gray or a bluish gray.	Ontario, New York	Reynales formation
Rhyolite				Gray to grayish black, flow banding may be present alternating from light to darker gray	North America
Richmond Amphibolite				Dark gray	Maine	Nehumkeag Pond Formation
Rickenbach Chert AKA: Crooked Swamp Chert				Dark gray	Pennsylvania, New York, New Jersey	Rickenbach Dolomite Formation of the Beekmantown Group
Ridgely Quartzite				Ranges from white to a light tan or a medium gray or pink.	West Virginia, Maryland, Virginia, Pennsylvania	Ridgely Sandstone Member of the Oriskany Formation
Rockdale Run Chert				Ranges from nodules of light to medium gray or beds of white chert.	West Virginia, Virginia, Maryland, Pennsylvania	Rockdale Run Limestone Formation of the Beekmantown Group
Roquemaure Jasper				Red and black	Quebec	Basalt formations
Ruth Lake Chert				Ranges from a dark gray to green.	Quebec, Labrador	Ruth Lake Formation of the Knob Lake Group.
Saugeen Chert Bois Blanc variation				Color ranging from very light almost white with light blue patches.	Ontario, Michigan, and Wisconsin, New York	Bois Blanc Formation
Saugus Jasper AKA: Saugus Rhyolite				Ranges from a dark red to pink with thick veins of cream or pale yellow commonly occurring.	Massachusetts	Lynn Volcanics
Schoharie Chert AKA: Aquetuck Chert				Homogenous yellowish brown to a very dark gray.	New York, New Jersey, Pennsylvania	Schoharie Member of the Onondaga Limestone Formation
Scots Bay Chert AKA; Scots Bay Agate / Jasper, Mina Basin Chert, Parrsboro Jasper				Ranges from most commonly a light brown to tan or a red to reddish purple with maroon streaking, milky white also occurs.	Nova Scotia, New Brunswick, Maine	Scots Bay Formation of the Fundy Group
Seneca Chert AKA: Moorehouse Chert				Medium gray weathering to light colors.	New York	Seneca Member of the Onondaga Limestone Formation
Seritized Rhyolite					Quebec	Watson Lake Group
Seward Quartzite				White	Labrador, Quebec	Seward Formation of the Knob Lake Group
Shadygrove Chert				Cream	Pennsylvania	Shady Grove Formation of the Conococheague Group
Shequindah Quartzite AKA: Kikkarney Quartzite, Munising Quartzite				Ranges in color from a white to a light gray and has light rose color staining.	Ontario, New York	Bar River Formation
Shiphead Chert					Quebec	Shiphead Formation of the Gaspé Limestone Group
Shiver Chert AKA: Penns Creek , Snyder County, Troxellville, and Stoney Ridge Chert				Ranges in color from a medium gray to black	Maryland, and Virginia, Pennsylvania	Shiver Formation of the Helderberg Group
Sims Quartzite				White	Quebec, Labrador, Newfoundland	Sims Formation of the Knob Lake Group
Sky Hill Chert AKA: Mahoning Chert, Lawrence County Chert				Ranges in color from a light brown or tan to black. The most common color is gray	Ohio, Pennsylvania	Upper Mercer Formation of the Pottsville group
Snake Hill Chert				Ranges from a dark greenish gray to black	New York	Snake Hill Shale Formation
Slacks Lake Chert				Maroon and green color.	New Brunswick	Slacks Lake Formation of the Sheephouse Brook Group
Sokoman Chert				Ranges from a dark greenish gray to a grayish black weathering to a brown or gray.	Quebec, Labrador	Sokoman Formation of the Knob Lake Group
Sterling Hill Sussexite				Ranges from pink to a pinkish violet or red with yellow or violet occurring with reduced frequency.	New Jersey
Stirling Carnelian				Translucent and varies in shades from reddish brown to reddish orange.	New Jersey	Watchung Series basalt formations
Stissing Chert				Ranges from white to yellow or black.	New York	Stissing Dolomite Formation of the Wappinger Group
Stonehenge Chert AKA: Stonehenge - Chepultepec Chert, Larke Chert				Ranges from a dark gray to black.	West Virginia, Virginia, Maryland, Pennsylvania	Stonehenge Limestone Formation of the Beekmantown Group
Ten Mile Creek Chert AKA: Washington Chert				Ranges in color from a dark brownish gray to an olive gray or bluish gray.	Ohio, Pennsylvania, West Virginia	Greene Formation
Thoroughfare Quartzite				White	New Brunswick	Thoroughfare Formation of the Grand Mann Group
Ticonderoga Chert AKA: Clarendon Springs Chert, Mount Independence Chert				Dark bluish black with visible phenocrysts of calcite and pyrite inclusions.	New York, Vermont	Ticonderoga Dolomite Formation, Beekmantown Group
Touladi Chert Trout Lake Chert AKA: Cabano Chert				Ranges from gray to a bluish gray or black with tans also occurring.	Quebec, New Brunswick, Maine	Cabano Formation
Tourelle Chert				Radiolarian chert	Quebec	Tourelle Formation, Quebec Supergroup
Tower Hill Quartzite				Light gray	Massachusetts	Tower Hill Quartzite Formation
Trading Run Chert AKA: Helderberg Chert				Light color ranging from a mottled white to gray, cream to yellow, and pinks with iron staining commonly present.	Pennsylvania, Maryland, West Virginia	Helderberg Formation
Traveler Rhyolite				Ranges from a bluish gray to light gray or bone white with phenocrysts of quarts, feldspar or garnets occurring.	Maine	Traveller Rhyolite Pogy Member
Trent Valley Chert AKA: Upper Gull River Chert				Ranges from black or blackish blue with lenticular cream or light tan mottling	Ontario	Upper Member of the Gull River Limestone formation
Tuscarora Quartzite AKA: Massanutten Quartzite				White and gray	West Virginia, Maryland, Pennsylvania, Virginia	Tuscarora Quartzite Formation of the Judy Gap Group
Unakite				Mottled green and pink	Tennessee , North Carolina, Virginia, New Jersey
Uniontown Chert AKA: Waynesburg Chert				Ranges from light to medium gray or yellowish brown with yellow streaks.	West Virginia, Maryland, Pennsylvania	Uniontown Formation of the Monongahela Group.
Upper Mercer Chert				Ranges in color from a medium gray to black	Ohio, Michigan, Ontario, Pennsylvania, New York	Upper Mercer Limestone of the Pottsville group
Vanport Siliceous Shale AKA: Jefferson County Slate				Dark Gray	Pennsylvania	Vanport Formation
Vaughn Hills Quartzite					Massachusetts	Vaughn Hills Formation
Vera Cruz Jasper				Ranges from a brownish yellow to a mustard yellow or a brownish red to red. Commonly has veinlets of quartz.	Pennsylvania
Vinylhaven Rhyolite				Ranges from a flow banded rhyolite to a spherulitic rhyolite	Maine	Vinylhaven Rhyolite Formation
Wallkill Chert				Ranges in color from black to bluish gray or light gray	Pennsylvania, New Jersey	Wallkill Member of the Leithsville Formation
Washademoak Lake Chert AKA: Belyeas Cove Chert				Variegated with multiple colors occurring with shades of red and gray being the predominate color. Jasper also occurs.	New Brunswick, Maine	Cumberland Group
Wassataquoik Chert				Ranges from a medium or dark gray to greenish gray or black. Red jasper also occurs in this formation.	Maine	Wassataquoik Chert Formation
Weir Chert AKA: Armstrong Brook Chert				Chert, quartz, and jasper all occur in this formation	New Brunswick, Quebec	Weir Formation
Weskeag Quartzite				Yellowish gray on freshly fractures surfaces weathering to a buff brown.	Maine	Weskeag Member of the Rockland Formation
Westboro Quartzite AKA: See page				Ranges from a white to a light gray or light tan.	Rhode Island, Massachusetts, Connecticut	Albion Schist Formation
White Rock Quartzite				White	Nova Scotia	White Rock Formation of the Rockville Notch Group
Whitehall Chert AKA: Mount Independence Chert				Ranges from a dark gray to a bluish black.	Vermont, New York	Whitehall Formation of the Beekmantown Group
Wishart Quartzite				Ranges from white to light gray	Quebec, Labrador	Wishart Formation of the Knob Lake Group
Wissahickon Quartzite / Vein Quartz				gray quartzite with milky white veins of quartz.	Pennsylvania, New Jersey, Maryland, Delaware	Wissahickon Formation
Zaleski Chert Upper Mercer Chert variation AKA: Black Flint				Glossy black and commonly has white streaks	Ohio, Indiana, Michigan, Ontario, Pennsylvania, New York	Zaleski member of the Allegheny Formation
Zion Hill Quartzite				Ranges from a light greenish gray to a whitish gray.	Vermont	Zion Hill Quartzite Member of the Bull Formation