Outline is Representative of Size and Shape:
Type A
Type B

Name Details:
Identified By:  Earl H. Swanson
Named For:  Type Site
Date Identified:  1969
Type Site:  Birch Creek Valley, Idaho
Point Validity: Valid type
Swanson was a distinguished anthropologist who served as a professor for the Department of Anthropology, Idaho State University and  Director for the museum at Idaho State University.  He also taught at the Institute of Archeology, London, England.  He conducted extensive studies into the archaeology of Idaho and the Great Basin and was consider an expert in archaeology of southeastern Idaho.  This type was named in his studies into the archeology of Birch Valley Idaho and has several professional references during the 1980's.  References to this type has diminished since that time.  
Birch Creek Lanceolate
Cluster:
Description of Physical Characteristics and Flaking Pattern:
This is a narrow medium ovoid  to lanceolate point with an elliptical to plano convex cross section.   The blade is excurvate, curving in at the tip and becoming almost parallel (Type A) and curving back in towards the base (Type B).  The base ranges from straight to slightly concave (Type A) to convex with rounded basal corners (Type B).  This point has a random flaking pattern.
Size Measurements:

Total Length - 44 to 75 mm, Blade Width - 15 to 26 mm, Thickness - 5 to 8 mm
Commonly Utilized Material:
Additional Comments:

Granger and Ireland (1986), note that this type rarely appears in literature.  Butler first uses this name, and illustrates them,  for examples found on the mouth of the Portneuf River, but does do describe the type.  Swanson, King and Chatters names and describes Type A and Type B.  They also mention a Type C, but does not describe or illustrates this type.  The full distribution on this type is not mentioned by Swanson or Butler.
Distribution:
Distribution Comments:

This point is primarily found in central to southeastern Idaho and into the surrounding region of Utah, Wyoming, and Montana.  This point has been found as far west as Long Valley Idaho.
Age / Periods:
Date: 9,000 - 7,000 B.P.
Cultural Period:Transitional Paleo to Early Archaic
Glacial Period: Early to Middle Holocene
Culture:
Age Details:
Similar Points:
Agate Basin, CascadeEmbarrasHaskett Type 1,  HumboldtOwl Cave
Other points in this cluster / Related / Associated Points:
Pictures: 
Type A


Type B
Pictures Provided By:
Birch Creek Projectile Point, Birch Creek Arrowhead


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References: (See Reference Page, Entry Number):

175, 176