Outline is Representative of Size and Shape:
Name Details:
Identified By:  B. Robert Butler
Named For:  
Date Identified:  1961
Type Site: 
Point Validity: Valid type

Butler is a distinguished anthropologist and a professor at the Idaho State University.  Butler conducted many excavations in Idaho and is an expert on point typology.  This type was named in a professional publication and has many professional references.  This is considered a valid type.
Cascade Shouldered
Cluster:
Description of Physical Characteristics and Flaking Pattern:
This is a medium to large lanceolate contracting stem point with an elliptical cross section.  The blade is excurvate and commonly has fine serrations.  The shoulders are weak to absent and at an upward angle.  The stem is contracting with a convex base.  Grinding of the hafting region is generally absent. The flaking pattern may range from parallel oblique to random.     
Size Measurements:

Total Length - 25 to 145mm (average 45 to 70 mm),  Blade Width - 11 to 35 mm (average 20 to 25 mm),  Thickness - 3 to 9 mm.
Commonly Utilized Material:
The most commonly used material is obsidian and basalt followed by locally available materials.  Heat treatment is not used for this type. 
Additional Comments:

This type is similar to the Mahkin Shouldered Lanceolate type, but the Mahkin type has basal and hafting region grinding while basal grinding is absent on the Cascade Shouldered type.
Distribution:
Distribution Comments:

This point is primarily found in Columbia Plateau of Washington and Oregon and into northern Idaho and western Montana.  This point is found through the Cascade Range and into the northern Sierra Nevada range of California and Nevada.  This point may be found into the  Okanagan Range of British Columbia and extends to the coastal regions.
Age / Periods:

Date: 8,000 - 5,000 B.P.
Cultural Period: Early to Middle Archaic
Glacial Period: Middle Holocene
Culture: Old Cordilleran Culture
Age Details:
This point is part of the Cascade Phase.
Similar Points:
Agate Basin, DeStaffany Stemmed, Duke Point Diamond, Early Leaf, Excelsior, Haskett, Lehman, Lochnore, Mahkin, Need, Owl Cave, Parman, Pender Canal, Spedis, Steamboat, Wildcat Canyon, Windust, Xil, Yukon Constricting Base
Other points in this cluster / Related / Associated Points:
Cascade, Cascade Bi-Point (Kennewick), Cascade Knife, Mahkin Shouldered Lanceolate
Pictures: 

Pictures Provided By:
Trevor
Brett Baker
Glinda Addington
Simon Villeneuve
Western Artifacts
Windy City Artifact

 Cascade Shouldered Projectile Point, Cascade Shouldered Arrowhead
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References: (See Reference Page, Entry Number):

5, 23, 30, 48, 50