512 DEPARTMENT OF THE INTERIOR 



2 GEORGE V., A. 1912 



Fossils — Continued. 



Spwiferirva aff. hilUngsi Shumard. 



Cliothyridina pectinifera Sow (?) 



Hustedia aff. compressa Meek. 



Hustedia aff. meekana Shumard. 



Pugnax aff. Utah Marcou. 



Dielasma (?) sp. 



Oamarophoria sp. 



Aviculipecten aff. coxarws M. and W. 



Pamllelodon aff. tenuistriatus Meek and Worthen. 



Parallelodon sp. 



Sanguinolites sp. 



Nwticopsis sp. 



Orthoceras sp. 



Section II. 



On the Commission trail running along the Boundary line eastward from 

 the Cultus lake valley and about 1,200 yards southwest of Monument 45, a 

 massive limestone with a fifty-foot interbed of dark gray shale was found to 

 carry fossils (No. 1500). The species were identified by Dr. Girty as: — 



Fusulina elongata Shumard. 

 Bhombopora sp. 

 Productus (?) sp. 



. This limestone appears to correspond to member g of Section I. It dips 

 under the great volcanic member in apparent conformity. The exposures at this 

 point are too poor to make the section of very great value. 



Section III. 



One of the most useful sections in the series is one traversed, in 1901, 

 along the west slope of McGuire mountain where it steeply plunges to the bed 

 of Tamihy creek, 6,000 feet below its summit. This mountain is crowned by 

 a very ragged and broken syncline of massive limestone equivalent to that on 

 Church mountain across Tamihy creek and to member g of Section I, (Plate 

 42, A). An infold of the shale overlying the limestone seems to correspond to 

 the shale of member / of that section, but the volcanic member seems to have 

 been here entirely destroyed by erosion. Below the massive limestone is a great 

 thickness of sediments which are fairly well exposed in the gulches leading 

 down to Tamihy creek. Measurements are very difficult to make on account of 

 frequent faults and crumples in the bed. An approximate idea of the succession 

 can be obtained from the following table : — 



