RIVER BASIN SURVEYS — F. H. H. ROBERTS 357 



general program. One of them, the Allen site, was located on Medi- 

 cine Creek, while the other two were on Lime Creek in the same 

 drainage. At the Allen site there were two occupation levels occur- 

 ring in the base of a terrace that was provisionally correlated with 

 the Mankato Substage of the Wisconsin Glacial Stage. The cultural 

 material began some 20 feet below the present surface and occurred 

 in a band from 21^ to 3 feet thick. The two levels were separated by 

 an intermediate zone about II/2 feet thick, which contained only a 

 small amount of cultural material. The lowest level was characterized 

 by the remains of small camp fires, which had been built on the old 

 surface, large numbers of broken and disarticulated animal bones, 

 and scattered artifacts consisting of knives, scrapers, blades, abrading 

 stones, hammerstones, projectile points, and bone implements. The 

 upper level showed little change in the nature of the artifacts, but 

 there was a distinct difference in the character of the animal bones 

 associated with the fireplaces and artifacts which possibly indicates 

 a significant change in the fauna of the area, possibly as a result of 

 some change in climatic conditions. The nearest similarities to 

 groups of elements from the complex at the Allen site thus far noted 

 are with those from Dead Man Cave in northeastern Utah. Charcoal 

 obtained from the earliest occupation at the Allen site gave a carbon-14 

 date of 10,493 ±1,500 years, while some from the upper layer gave a 

 date of 5,256 ±350. A tentative geological dating from Dead Man 

 Cave has placed its first occupancy at approximately 4,000 years ago, 

 which gives grounds for interesting speculations pertaining to the 

 similarities between the two cultures (Holder and Wike, 1949). 



At the original "Lime Creek discovery" eight cultural horizons have 

 been located, but in only one has an adequate series of artifacts been 

 found. The general indications are that the culture is related to that 

 which produced the Plainview-type points found in western Texas 

 and other localities throughout the Plains area. The evidence at 

 Angostura for the association of a Plainview variant with the ma- 

 terials there, and the date of approximately 7,000 years for that as- 

 semblage, give a good indication of the age period to which the Lime 

 Creek points may belong. The other Lime Creek site, some distance 

 downstream from the first, is one where animal bones and artifacts 

 occur in a dark gray stratum 471/2 feet below the surface of the present 

 terrace. The so-called Scottsbluff Yuma-type projectile point is 

 reported to have been found in situ there together with Iniives, 

 numerous flakes, end scrapers, leaf -shaped and other blades, and con- 

 siderable quantities of chippers' debris. The animal bones represent 

 some 17 mammalian forms as well as those of birds, reptiles, and 

 amphibians (Schultz and Frankfortcr, 1948, 1949) . When the carbon- 

 14 age of 9524 ±450 years for the site was first announced it was 



