224 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 93 



artifacts are planoconvex in fornL The majority of the points found 

 in the prehminary excavations were of Folsom type (NAb4), and 

 these range from very small to medium sizes. The only other type of 

 point so far recovered are two small specimens without any groove 

 (NAb2), both of which are thinned down at the butt end and one of 

 which is largely planoconvex. The great inijiortance of the find lies in 

 the fact that there was here uncovered in situ a complex of artifact 

 types extensive enough in range to merit for the first time the desig- 

 nation " Folsom culture ". The nature of the associated fauna as well 

 as the geologic horizon represented have not yet been determined. 

 Work at the site has only begun, l)ut the situation seems favorable for 

 correlation with the glaciated regions and the terrace systems of the 

 Platte drainage, hence there is a good chance of dating the horizon. 

 Further work should also go far toward defining the Folsom culture 

 (or aspect) in its major characteristics. 



So far as geology is concerned, the clearest case seems to be the 

 Angus deposit, which appears to be definitely Pleistocene (and proba- 

 bly mid-Pleistocene) , but here the evidence of association is as yet very 

 unsatisfactory. The rest, although extremely promising, await future 

 geologic research. The second factor inhibiting cultural classification 

 is the extremely limited amount of the human material found in such 

 associations. In a later section such wider correlations as seem justi- 

 fied at the present time will be suggested. One important stratified 

 site, that on the summit of Signal Butte, remains to be discussed. 



Signal Butte, A Stratified Site in Scotts Bluff Colintv 



In February 1931 the writer was informed by Thomas L. Green, of 

 Scottsbluff, that stratified deposits of human origin occurred on the 

 top of Signal Butte, a picturesque mesa (pi. 27,, fig. i) located about 

 21 miles southeast of the town of Scottsbluff (map, fig. i, site 27). In 

 August 1931, while on an archeological reconnaissance for the Bureau 

 of American Ethnology, I visited the site, accompanied by members 

 of the University of Nebraska Archeological Survey field party. We 

 were under the guidance of Mr. Green. Test trenches were made at 

 this time, which demonstrated the great importance of the site (Strong, 

 1932 a). In June and July, 1932, a Bureau of American Ethnology 

 field party, assisted by four holders of archeological fellowships from 

 the Laboratory of Anthropology at Santa Fe, conducted intensive ex- 

 cavations here under my direction. Permission to excavate was very 

 kindly granted in behalf of the other owners by E. S. Simpson; Mr. 

 and Mrs. Simpson were helpful in many other ways as well, and we 



