EECAPITULATIOIsr OF PALEOZOIC FORMATIONS. 199 



4. Because very fragmentarj- evidence from the Uinta sandstone itself indicates 

 that its upper portion is also of Pennsylvanian age. 



Powell obtained a few species from the Red Wall at Cataract and Gypsum can- 

 yons in eastern Utah which while apparently indicating Upper Carboniferous are not 

 very diagnostic. They are Chietetes milleporaceus^ Syringopora multattenuata^ and 

 CampophyUum sp. King also cites Syringopora as occurring west of Ute Peak, at 

 a horizon somewhat higher than the fauna referred to below. Powell says that 

 Carboniferous fossils were found in the Lodore group, but does not specify what 

 they were. Apparently none were collected. King cites Spiriferina Jientuchyensis, 

 Seminula suhtHitd, and 2fetl:eUa utriaticostata, adding: "These are the lowest forms 

 obtained from the Upper Coal Measures S3'stem in the Uinta, and are collected within 

 60 feet of heavy beds of the Weber. " " The locality is west of the canyon of Lodore 

 at Ute Peak, and the stratigraphic horizon should be in the Lodore group if the lim- 

 its of King's Weber and PowelFs Uinta series are taken at the same level. Though 

 some doubts might remain in spite of the corals found by Powell, the evidence of the 

 Spwiferina, Seminula, and especially the 2£eehella, is unmistakable, and shows that 

 the Lodore group, or in aiiy event the Red AVall group, belongs in the Upper 

 Carboniferous. 



The Uinta sandstone has been said to be essentially^ unfossiliferous. Onh' three 

 instances of the occurrence of fossils are known; all were from debris, but their 

 occurrence and lithology seem to render the assignment to the Uinta sandstone as the 

 original horizon probable. Half of a Splrifer of the rmhrex tvpe found near Mount 

 Agassiz, the impression of a crinoid column at the head of Bear River, and a speci- 

 men of Spirifer camerahis from the Bench region, near Geode Canyon, comprise the 

 entire paleontologic evidence. ■ Spirifer cameratus is distinctlj' an Upper ('arbon- 

 iferous type. The Spirifer imbrex could hardly be lower than the Carboniferous, 

 while, in view of local conditions, even the crinoid column may be taken as probably 

 indicating the same period. The paleontologic evidence, therefore, is confirmatory 

 of the correlation by stratigraphy of the Uinta sandstone, at least in its upper part, 

 with the Weber quartzite of the Wasatch Range, which is known to be of Upper 

 Carboniferous age. 



Another matter of disagreement between King and Powell is that the latter 

 refers his Shinarump group to the Juratrias, the lower portion of which constitutes 

 King's Permo-Carboniferous series. Powell's Shinarump measures 1,800 feet. 

 King's Permo-Carboniferous is reported as from 200 to 500 feet. Near the top of 

 the Permo-Carboniferous the geologists of the Fortieth Parallel Survey obtained 

 some fossils which were identilied as Myalina (resembling suhquadrata), Myalina n. 

 sp., Bakeioellia parva, Pleuroplwrus sp., and Macrodon sp. If correctly identified, 



a n. S. Geol. Expl. 40th Par., Kept., vol. 1, p. 145. 



