WEBER CONGLOMERATE. 91 



Productus ]iriittciiiaiiiis. Athjris hirsnta. 



Productus sfinireticulatus. Rhynchoiiclla eiirekensis. 



Spirifcra aiinectans. Cainaroplioria cooiiereusis. 



Spirifera caiiH'rata. Terehratiila liastata. 



Spirifera leidyi. Avicnl()])cctt'u atliiiis. 



Spirifera uesiecta. Streblopt«M'ia siiiiilis. 



Spirifera rockymoutana. Myalina eouf^eiieris. 



Spirifera striata. Bellerophon, sp. ? 



Spirifera (M.) .setigcra. Metoptoina peroccideus. 



Syrintjotbyi'is cuspidatus. Griffithides portlocki. 



Along' Carbon Ridge tlie limestones are well developed bnt have as yet 

 yielded little calling for special comment as regards tlie life of the jjeriod. 

 The limestone forming the top of Diamond Peak and the long Alpha ndge 

 west of Hayes Canvon carry several fossiliferous strata at different hori- 

 zons, bnt all of them present mnch of the same grouping of species. Near 

 the summit of Diamond P(^ak a shaly limestone was found to contain 



Polyiiora (like P. stragula). Spirifera (M.) setigera. 



Orthis resupinata. Athyris roissyi. 



Productus nebrasceusis. Athyris liirsuta. 



Productus semireticulatus. Griffithides ]K)rtlocki ? 



Spirifera trifjoualis. Camarophoria cooitcreusis. 



It seems hardly necessary to repeat nearly similar lists from neigh- 

 boring localities so long as there a])pears to be no marked cliangc of fauna 

 with the develojunent of the limestones. Most of the species obtained 

 proved to be specifically identical with those from the limestone Ixxlv of 

 Richmond Mountain and Carbon Ridge east of the lloosac fauh. The 

 region of Diamond Peak does not offer as many species, but on the other 

 hand it has not been as diligently searched. Tlie Lanie]lil)raiichiatc fauii;i 

 wiis nowhere recognized in tlie region of Diamond Peak. 



Weber Conglomerate.— Conformably overlying the Lower Coal-measures 

 comes the Weber conglomerate, one of the most [)ersistent and well defined 

 horizons over wide areas of the Cordillera, stretching westward all the way 

 from the Front Range in f^olorado to tlie FAireka Mountains. It varies in 

 the nature of the si'diment with everv changing condition, but it is nearly 

 everywhere easilv recognizeil as a siliceous formation l)etween two great 

 masses of Carboniferous limestone. In places it is made up of an admi.xture 



