CONTENTS 



Page 



Introduction i 



Personnel 4 



Laboratory activities 6 



Fieldwork and explorations 10 



Colorado 12 



Kansas 13 



Montana and Wyoming 14 



Nebraska 32 



North Dakota 39 



South Dakota 48 



Fieldwork in paleontology 69 



Fieldwork by other agencies 71 



Colorado 72 



Missouri 73 



Montana 73 



Nebraska 74 



North Dakota 81 



South Dakota 83 



Wyoming 88 



Conclusion go 



Literature cited 96 



ILLUSTRATIONS 

 PLATES 



Following page 



1. a, Excavations in a shallow camp site, 48FR23, Boysen Reservoir. 



b, View of excavations in stratified site, 48CK204, Keyhole Reser- 

 voir 12 



2. a, View across Marias River toward a buried pottery-bearing site, 



24TL26, Tiber Reservoir, Montana. b. Excavation in lower, 

 pottery-bearing occupational level at site 24TL26, Tiber Reservoir, 

 Montana 12 



3. Chipped-stone artifacts from site 24TL26, Tiber Reservoir 12 



4. Bone and antler artifacts from site 24TL26, Tiber Reservoir 12 



5. a, Pottery sherds and shell bead from site 24TL26, Tiber Reservoir. 



b, Part of site 48BH7, group of 23 tipi rings, Yellowtail Reser- 

 voir 44 



6. a, River Basin Surveys camp at Rock Village, 32ME15, Garrison 



Reservoir, in October 1950. b, Excavated floor of circular 



house in Rock Village, 32ME15, Garrison Reservoir 44 



7. a, Cross-section view of slab-lined central fireplace in house, Rock 

 Village, 32ME15, Garrison Reservoir. b, Aerial view of site 

 32ML1, Fort Stevenson, Garrison Reservoir, a year after excava- 

 tion by River Basin Surveys . . .' 44 



iii 



