129 



Minerals and geological specimens — Continued. 



Yellow indurated sand, with estuary shell of genus, 

 Cyrena . 



Light colored indurated clay, base of section 



Dark carbonaceous clay, over 304 



Lignite, over 305 



Dark argillaceous shale, over 306 



Yellow indurated sand, with Paludina and Melania . 



Grayish indurated sand 



Dove colored calcareous shale, with Unios and other 

 fresh water shells - 



Argillaceous limestone, with fossil plants 



Fine light colored marl, under lignite bed 



Lignite, bright and compact 



Drab indurated clay 



Light colored marl, with impressions of dicoty- 

 ledonous leaves 



Earthy lignite 



Lignite 



do more impure 



Concretions sulphuret iron, common throughout 

 tertiary series 



Septaria, spherical 



Carbonaceous indurated clay, charged with vega- 

 table remains, fresh water, and land shells, Buli- 

 mus, Physa, Pupa, &iC 



Mineralized wood 



Carbonized wood from lignite bed 



Light sandy marl 



Shell marl, containing fresh water shells 



Impure lignite 



Light colored, fine, clay, under lignite bed 



Brown shale, with vegetable impressions 



Silicious shale, containing much vegetable matter . 



Gray shell limestone, soft 



Carbonaceous clay, with Unio, Paludina, Sfc 



Coarse, gray shell, limestone 



Compact, bluish, limestone, with fresh water shells. 



Gray calcareous sandstone, with Unio, Paludina, Sfc 



Soft argillaceous limestone, with Paludina rochiformi 



Crystallized carbonate of lime in concretions 



Dove colored argillactous limestone, with impres- 

 sions of ferns, over 315 



Brown calcareous shale, with Taxites 



Silicified wood 



do partially carbonized 



do do do 



do do do 



do do do 



do with cavities lined with drusy quartz 



Dove colored clay, metamorphosed by burning out 

 of lignite beds . . 



Cherry creek 



Fort Clark 



do. 



do. 



...do do 



...do do 



. . . do -do 



...do do 



-.-.do. 



...do 



Brownish shale do 



Scoria, black, formed by . 



. . do . . . yellowish - . do 



- . do . . black compact 



. . do . . green vitreous 



. . do do do 



. . do . . red, very porous 



..do. -brown, very porous do do . 



Shal6 burned red, with vegetable impressions. 



do bright red do do .. 



do Vermillion, with gj'psum... 



9h 



Eed spring 



FortBerthold 



do 



do 



High butte. Little Missouri. 



Fort Union. 



do.. 



Yellowstone 

 do.., 



do.. 



Fort Union. 



do 



do 



do 



do 



do 



do 



do 



Milk river 



do 



do 



Yellowstone 



Elk Horn prairie. 



Red spring 



Yellowstone 



Pardu river 



Fort Union 



do... 



Yellowstone 



do... 



do... 



do.-, 



do... 



do... 



Fort Union . 



Mussel Shell river 



do 



Yellowstone ...... 



do ,.. 



do 



do 



do 



do 



do 



do 



do 



do , 



