70 PROCEEDINGS OF THE WASHINGTON MEETING 



TITLES AND ABSTRACTS OF TAPERS PRESENTED BEFORE THE AFTERNOON 

 SESSION AND DISCUSSIONS THEREON 



PENNSYLVANIAN OF TENNESSEE 



BY L. C. GLENN 



(Abstract) 



The paper described briefly the formations into which the Pennsylvanian is 

 divided in the State, gave their areal distribution, discussed the principal coals 

 in each, and attempted to correlate these coals. P>rief consideration was given 

 to the age of the deposits found in the State. 



Presented in abstract extemporaneously. 



SUBDIVISIONS OF THE THATNES LIMESTONE AND NUGGET SANDSTONE, 

 MESOZOIC, IN THE FORT HALL INDIAN RESERVATION, IDAHO 



BY GEOEGE R. MANSFIELD 



{Abstract) 



A mineral examination of the Fort Hall Indian Reservation by a Geological 

 Survey party in 1913 involved a detailed mapping of some of the Mesozoic 

 formations. It proved desirable to subdivide the Thaynes limestone, Lower 

 Triassic, and the Nugget sandstone, Jurassic or Triassic. The thickness of 

 these strata, including the intervening Ankareh sandstone, is about 6,S00 feet. 



The Thaynes limestone was raised to the rank of a group consisting of 

 three formations — the Ross limestone at the base, the Fort Hall formation, 

 and the Portneuf limestone. The Ankareh, which at the type locality is a 

 shale, was here found to be a sandstone. The Nugget sandstone was sub- 

 divided into four members — the Higham grit at the base, the Deadman lime- 

 stone, the Wood shale, and the main sandstone member. 



The paper described briefly the formations subdivided, explained the use of 

 the names, and included a discussion by G. H. Girty of the interesting faunas 

 of the three formations of the Thaynes group. 



Presented in abstract extemporaneously. 



STRATIGRAPHY OF SOME FORMATIONS HITHERTO GALLED BEGKWITH AND 

 BEAR RIVER, IN SOUTHEASTERN IDAHO 



BY GEORGE R. MANSFIELD AND P. V. ROTJNDY 



(Abstract) 



In the Montpelier and Wayan 30-minute quadrangles of southeastern Idaho, 

 parties of the Geological Survey have found great thicknesses of strata, aggre- 

 gating 17,000 feet or more, that have hitherto been assigned to the Beckwith 

 and Bear River formations. On the maps of the Hayden Surveys both forma- 



