[Illustration: _Scottsbluff I_]
[Illustration: _Scottsbluff II_]
[Illustration: _Eden_]
Projectile points of the type Scottsbluff were first defined on the
basis of specimens recovered from a bison kill site near Scottsbluff,
Nebraska.
The over-all shape of Scottsbluff I points is either lanceolate or
triangular. Upper lateral edges are usually straight, but they may be
faintly rounded. Characteristic of this type is a broad stem and faint
shoulders. Parallel edges of the stem are straight; sometimes they may
expand towards the base. The small shoulders, the widest part of these
points, are cut inwards at right angles to the point long-axis. The stem
base is straight or slightly rounded, very rarely slightly concave.
Average dimensions range from about 5.0 to 15.0 cm. in length; width at
the shoulders is from 2.4 to 3.5 cm., and width at the stem base 2.0 to
3.0 cm. Workmanship on most Scottsbluff I points is well executed.
Initial shaping was carried out by direct or indirect percussion.
Typical of many Scottsbluff I points are the longish parallel flake
scars produced during this stage of retouch. They are at right angles to
the point long-axis and are of the transverse type. On others patterning
of flake scars is more irregular. Lateral edges of some may be
secondarily pressure retouched. Both the stem lateral edges and base are
smoothed.
Scottsbluff I points have a suggested age range of from 9,500 to about
7,000 years. They are known to occur not only in Nebraska, but in New
Mexico, Texas, Oklahoma, Louisiana, Arkansas, Colorado, Wyoming,
Montana, Washington, and in Saskatchewan, Alberta, and British Columbia.