1875.] ^t)5 [Stevensoa. 



construct a satisfactory section, but on Sulphur Creek, a tributary of 

 Bear River, Messrs. Meek and Bannister found exposures affording an 

 interesting series of disconnected sections. The following shows the suc- 

 cession, ascending, as far as it seems to have been worked out satis- 

 factorily : 



I. Shales and sandstones, not well exposed, about 500 ft. 



3. Two or three rather heavy beds of yellowish-gray 



sandstone, with sonae clays. Near the base, two 

 layers of sandstone occur, containing Ostrea soleii- 

 iscus, Trapezium micronema., etc., about 100 ft. 



3. Greenish and bluish-gray sandy clays and some dark 



shale. 100 ft. 



4. Goal. 7 ft. 6 in, 



5. Massive sandstone, light-colored, with sandy clay at 



base , 95 ft. 



6. Sandstones, clays, and arenaceous shales 275 ft. 



7. Not exposed, a horizontal distance of about. 2100 ft. 



S. Light-gray sandstones and clays, including a Coul bed, 



7 ft. 6 in,, sandstone, over coal, containing Inoce- 

 ramus prohlematicus, Cardium and undetermined 

 univalves. . , 150 ft. 



At Coalville, in Utah, the same gentlemen obtained the following mag- 

 nificent section. The order is ascending : 



1. Sandstones, clays, and arenaceous clays. . 163 ft. 



2. Clays and thin sandstones, with Inoceramns problem- 



aticus, Cardium subcurtum, Lucina, Macrodon, Mo- 

 diola muUiUnigera, Corbula, Arcopagia, Martesia, 

 Neritina pisum, Turritella, etc 150 ft. 



3. Clays and sandstone 80 ft. 



4. Coal. 13 ft. 



5. Yellow-gray sandstones, roof of coal, containing In- 



oceramus and Ostrea soleniscus ?.... 25 ft. 



6. Very dark clay with Inocerainus problematieus 80-100 ft. 



7. Clays and sandstones, not well exposed 100 ft. 



8. Sandstones, rich in fossils, Halymenites major, Avic- 



ula, Cardium, Trapezium, Tellina, etc 100 ft. 



9. Clays and sandstones 80 ft. 



10. Clays and sandstones, with Ostrea soleniscus, Avicula, 



Gdrdium, Tellina, Arcopagia, Oyrodes, Cyprimera, 



etc 190 ft. 



II. Clays, sandstones, and some conglomerate 250 ft. 



12. Not well exposed, shales and clays 600 ft. 



13. Shale and sandstone 37 ft. 



14. Coal 2^ ft. 



15. Clays and some sandstone, with mixed fauna, Anomia 



