158 



CAMBRIAN BRACHIOPODA. 



Detailed stratigraphic distribution of Cambrian and Ordovician Brachiopoda — Continued. 

 Utah: House Kange, Millard County— Continued. 



House Range section. 

 [Walcott, 1908f, pp. 173-185.] 



MIDDLE CAMBRIAN— continued. 



ffowdi/ormaiioji— Continued . 

 Ig. Gray siliceous limestone in thick beds.. 



111. Pinkish argillaceous shale, which is helieved to be the same as 

 the Spence shale member of the Ute limestone ot northeastern 

 Utah, is exposed on the east side of Dome Canyon a little 

 above where it bends to the westward 20 



Total of Howell formation . 



Localities and species in the 

 House Range section. 



3v. 



MicromUra (Iphidella) can- 

 nula — 3v. 

 Obolus (Westonia) ella — 3v. 

 LiTi^ulella dubia—3v. 

 A CTothele subsidua—Sv. 

 Hyolithes Wllingsi—iv . 

 Ptijclioparia piocliensis — 3v. 

 Ptychoparia sp. — 3v. 

 Zacanthoides typicalis — 3v. 

 BatUyuriscus productus — 3v. 



Other localities and species in 

 Utah and Nevada shown in 

 their approximate strati- 

 graphic position. 



55u!. 



MicromUra (Iphidella) pannula- 



oou. 

 Linnarssonella urania — 55u. 



3c, 7k, 30a, 31, 31u, 32o, 34llT, 

 329e, 333, 333a, 333b. 



MicromUra (Iphidella) pannula — 



30a, 31, 333. 

 Obolus mcconnelli — 34n . 

 Obolus (Westonia) ella — 3c, 30a, 



31, 31u, 320, 329e, 333, 333a, 333b. 

 Lingulella dubia — 31 , 333. 

 Lingulella lielena— 30a. 

 Hyolithes billingsi— 30a, 31, 31u. 

 Isoxys argentea — 30a. 

 Eocystites longidactylus—Zl, 31u, 



333. 

 Ptychoparia tempi— 333b. 

 Ptychoparia piochensis — 31, 31u, 



333a, 333b. 

 Ptychoparia quadrans — 30a. 

 Anomocare parvum — 31. 

 Bathyuriscus howelli — 31, 3iu, 333, 



333a, 333b. 

 Bathyuriscus productus — 30a, 31, 



31u, 333, 333a. 

 Zacanthoides grabaui — 333b. 

 Zacanthoides typicalis — 31, 31u, 



333, 333b. 



Langston (?) limestone [Walcott, 1908a, p. 8]: o 

 la. Massive-bedded bluish-gray arenaceous limestone, with irregu- 

 lar partings of buff-colored arenaceous limestone. The lat- 

 ter penetrates the layers of limestone in the most irregular 

 manner and frequently surrounds small irregular nodules 

 of the bluish-gray limestone 170 



30e. 



Billingsella sp. undt.- 

 P^afyceras- 30e. 

 Hyolithes— 30e. 

 Leperditia—30e. 

 Ptychoparia — 30e. 

 Zacanthoides — 30e. 

 Dorypygc? — 30e. 



16. Brown bufl-weathering arenaceous limestone in thick layers; 



almost sandstone in places 35 



Total of Langston (?) limestone 205 



Total Middle Cambrian 4, 417 



LOWER CAMBRLIN. 



Pioche formation [Walcott, 1908a, p. 11] 6 

 Arenaceous and siliceous shaly layers, with some thicker layer; 

 quartzitic sandstone 



41, 30, 31a, 331, 313g. 



MicromUra (Iphidella) pannula — 



41, 3D, 31a. 

 Obolus (Westonia) ella—33i. 

 Acrothele spurri— 31a. 

 Acrothele subsidua ftcra— 31a. 

 Acrotreta claytoni — 4 1. 

 A crotreta primxva — 4 1 , 31a. 

 Billingsella highlandensis— 30, 31a.. 

 BilliTwsella sp.— 313g. 

 Nisusia (Jamesella) erecta—3\3g. 

 Hyolithes billingsi — 31a. 

 Callavia nevadensis—30, 313g. 

 Olenellus fremonti— 30, 313g. 

 Olenellus gilberti— 30, 31a. 

 Peachella iddingsi— SO, 313g. 

 Zacanthoides levis — 31a. 

 Crepicephalus augusta — 30, 31a. 

 Crepicephalus liliana — 30, 31a. 

 Oryctocephalus primus — 31a. 



Prospect Mountain quartzite\VJ aXr^it, 190Sa, p. 12] :c 

 Gray and brownish quartzitic sandstone in layers 4 inches to 3 feet 



in thickness 1,375+ 



Total Lower Cambrian 1.500- f 



Trtal Cambrian 9,232 



a This section of beds which are doubtfully referred to the Langston was measured at the same locality as the shale forming Ih of the Howell 

 formation, which is believed to be equivalent to the Spence shale member of the Ute limestone of northeastern Utah. 

 t> Section exposed at the westward bend of Dome Canyon, 

 c Section exposed on the west slope and foothills of the House Range north and south of Dome Canyon. 



