APPENDIX. 



Generalized Section for Southwestern Colorado — Continued. 



573 



Names of Formations. 



Thickness 

 in Feet. 



Characteristics. 



.22 ^ 



3£ 



Ouray limestone. 



200 + 



Pale yellow to buff, compact; lower third 

 shaly,with thin quartzites; abundant fossils 

 indicate, Devonian age of lower two thirds, 

 and Mississippian age of upper part. 



U£ 



Elbert formation. 

 Unconformity ^^- 



Ignacio quartzite. 



-n^x^. Unconformity ^v^^-v 



2 i 



o.o J Uncompahgre f or- 

 g's | mation. 



25-100 



0-200 



8000 + 



Thin limestone, sandstone, and calcareous 

 shale; contains fragmentary remains of 

 fishes. 



Light gray, pink, or yellow; massive and con- 

 glomeratic below, thin-bedded with shale or 

 sandy partings in medial zone, massive above. 

 Obolus sp. ? found near middle. 



Massive white or smoky quartzite and dark 

 slate, alternating in thin beds locally. No 

 fossils found. 



Schist and gneiss of light and dark colors, 

 often alternating. Intruded by granite and 

 cut by basic dikes, many of which have 

 been mashed. 



