KllIKKA SIX'TION. 



Eureka Section, Xerada, 30,000 feet. 



13 



Diamond Peak qnartzite 



ill-, with brown ;ind p-eeu shales at the 



White PiDe shale . 



lihu-k arsillacemis shales, mere or less areuaceous. with intercalations of 

 red and reddish brown friable sandstone, changing rapidly with the 

 locality; plant impressions. 



< Nevada limestone. 



,000 I Lower horizons indislim-tly bc.hlcd. snccbaroidal texture, gray cohir. pass- 

 ing up into strata distinctly bedded, brown, reddish brown, and gray 

 in "color, frequently tinely stni)ed. producing a variegatwl appearance. 

 The upper horizons are massive, well bedded, bluish black in color ; highly 



1 i'ossiiiferous. 



Lone Mountain limestone 1,800 ! Klack, gritty beds at the base, passing into a light gray ailicoous rock, with 



all traces of bedding obliterated ; Ti*enton fossils at the base; Halt/sites 

 in the upper portion. 



Eureka quartzite . 



•^ , Pogonip limestone 2,700 



\v hito, blue, passing into reddish tints near 



luterstratified limestone, argillites, ami areuaceous beds at the base, pass- 

 ing into i)urer, tine grained limestone of a hlnish gray color, distinctly 

 iM-dded; highly fossililVr.ius. 



Hamburg shale 350 



Hamburg limestone ^ 1, 200 



^ i Secret Canyon Shale 



3.050 



* of chert nodules through<mt the bed, but 

 le ; surface weathering, rough aud ragged ; 



Tellow and gray argillaceous shales, pa^ssiue into shaly limestone; near 

 the top, iuterstratitied layers of shale aud thinly bedded limestones. 



traversed with thin seams of calcite; beddiug planes very imperfect. 



IJedded brownish white quart/.ites. weathering dark brown; feiTugiuous 

 near the base; intercalaliMl Ibin bivrrs ot arenaceous shales; beds whiter 

 near the summit. 



Prospect Mountain quartzite . . - 1, 500 



Note.— Plane of uucouformily indicated by double dividing line. 



