Browns Valley points are rare and have an estimated age of from 9,000 to 8,000 years. Similar points excavated in Wyoming have a comparable age of almost 8,000 years.
AGATE BASIN POINTS
Agate Basin points were first recognized at a bison kill site between Newcastle and Lusk in eastern Wyoming. The bison were probably of a recent type, but this is not certain.
Agate Basin points are slender lanceolate in shape. Both the upper and lower lateral edges are gently rounded. Lower lateral edges on some, however, may be nearly straight and contracting slightly to the base. They are usually broadest above mid-section. The base is either straight or rounded, although on some specimens it may be bluntly pointed. Length varies from 6.0 to 15.0 cm., width from 2.0 to about 3.0 cm. Workmanship is quite fine. Initial shaping was by direct or indirect percussion. Flake scars are consistently sub-parallel and at right angles to the point long-axis. Thinning of lateral edges was by pressure retouch. Lower lateral edges are smoothed, the base rarely so. Basal thinning was achieved during initial retouch and is at right angles to the point long-axis.
Although the age range of Agate Basin points is uncertain, it is probable that they belong to a later stage of the Early Man point sequence.
GOLONDRINA POINTS
Golondrina points were defined on the basis of specimens found at the Devils River Site on the Rio Grande in southwest Texas.
Golondrina points are of broad lanceolate shape. Upper lateral edges are usually markedly rounded. Lower lateral edges are characteristically recurved, resulting in out-flaring basal corners of ears. The base is quite deeply concave. The broadest part is at mid-section or a little beyond, towards the tip. Average dimensions are: length 6.0 to 8.0 cm., maximum body width 2.3 to 3.2 cm., and base width 2.2 to 2.9 cm. Workmanship is fine. Initial and secondary shaping and thinning was by direct percussion. Initial flake scars are irregular. Pressure retouch of edges is not obvious. Essentially, vertical basal thinning was accomplished by the removal of either one or a series of irregular flakes. It should be noted that thinning scars on occasional specimens may be quite narrow and parallel to the point long-axis. Both the lower lateral edges and the basal concavity have been smoothed.
Golondrina