92 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I26 



tura point but added little to the cultural inventory otherwise. The 

 radiocarbon dates of 7073 ± 300 and 7715 ± 740 are, unfortunately, 

 from an area of the site that has yielded no diagnostic points in situ, 

 but there is good reason to believe the dates are applicable to these 

 distinctive artifacts. Nearly 300 miles to the southeast, in the Medi- 

 cine Creek Reservoir, the continued excavations in buried sites on 

 Lime Creek, most especially in the Red Smoke site, added consider- 

 ably to the previously rather scanty collection of Plainview points, 

 established the association of the Plainview and the somewhat similar 

 Meserve point, and expanded the inventory of other artifacts in the 

 complex. Although the geological associations of the Angostura and 

 Medicine Creek deposits are not such as to permit comparison be- 

 tween the two and radiocarbon dates have not yet been obtained for 

 the latter, the Plainview occupation at Lime Creek is presumably the 

 earlier. Plainview and Meserve points have been found elsewhere 

 associated with extinct bison, while at the Agate Basin site, which 

 produced points rather closely resembling Angostura points, only 

 modern bison are reported. 



Evidence newly acquired promises to fill in many details regarding 

 the succession of cultures during the several millennia succeeding 

 the earliest occupations in the more westerly parts of the Plains. Indi- 

 cations that eventually a number of horizons can be defined for this 

 area are beginning to emerge from the relatively scanty data now on 

 hand, and recent investigations under the salvage program will un- 

 doubtedly sharpen the definitions. The prospects seem bright that, as 

 instances of stratification multiply, as the artifact assemblages for 

 different complexes are expanded, and as radiocarbon dates are deter- 

 mined, a relatively complete history of the region can be developed. 

 At the present time, a general succession of projectile-point forms 

 seems to be definable, but undoubtedly as additional research results 

 in the determination of more or less complete complexes and of finer 

 typological distinctions, a much more refined temporal and cultural 

 breakdown will be achieved. Pending additional excavation, or at 

 least the analysis of the data now in the laboratories, about all that 

 can be said at present is that small notched and unnotched triangular 

 points were preceded by corner-notched points, which were in turn 

 preceded by lanceolate and other points that seem to occur in rela- 

 tively early contexts in the region and elsewhere. 



Apparently later in time than the complex represented at the Ray 

 Long site is a culture newly defined, mainly on the basis of work in 

 the Keyhole Reservoir. Both here and in the Angostura Reservoir, 

 its most distinctive artifact, the McKean point, has been found strati- 



