128 



irvnerals and geohgkal specimens — Continued. 



Yellow clay, with crystals of gypsum ...I Great bend of Missouri . 



Whitish alum clay, seams in 253 ' Bijoux hills 



Hyd. silicate of magnesia, masses in formation 

 No. 4 do 



Crystals sulphate baryta - - do 



White aluminous earth in seams . — I do 



Aluminous clay (255) - | do.... 



Ferruginous concretions throughout F, No. 4 j do - 



Crystalline argillaceous limestone (Cone in cone) .| Shyenne river 



Crystals of selenite in clay beds ; Fort Pierre 



Selenite and fibrous carbonate lime ...! Mouth Shyenne 



Yellow clay, with selenite ...j 12 miles above Fort Pierre. 



Dark, argillaceous, shale, witb Iiwceramm [ Mouth of Cannon Ball river 



Blue concretionary limestone, with Rosidlaria 1 Long Lake, Missouri 



Indurated clay I do 



Decomposed shale (253) Fort Pierre. 



Brown hematite 



do moreearthy 



Dog tooth spar — 



Gray arenaceous limestone 



do with carbonized matter, and shells. 



Soft argillaceous shale 



Concretions of compact blue limestone, contain- 

 ing great numbers of fossils 



do containing large crustacean (un- 



described) 



Crystallized carbonate of lime, yellow, forming 

 nucleus of concretions. — 



Crystals of selenite 



Blue indurated clay, with fibrous gypsum 



Dove colored laminated shale 



Petrified wood bored by Teredo bisinuata 



" Cone in cone" (241) 



Indurated clay, with shells v { Grand river 



Soft micaceous sandstone, thin seam in clay bed ..' Fort Pierre 



Vertebra of Mososaurus .. . \ do ... 



Wood bored by Zylophaga stimpsoni Mussel shell river 



White aluminous clay Fort Lookout 



Big Shyenne 



do 



Mussel Shell river. 



Milk river .., 



Cannon Ball river. 

 Yellow Stone river 



.do. 

 .do. 



Forks of Shyenne. 



do 



do 



Grand river 



Cannon Ball river 



Formation Xo. 5. 



Yellow arenaceous limestone, with Venus 



do softer 



Yellowish calcareous sandstone, with Oyprina. 



do do decomposed . . 



Soft, fine, sandstone, with Rostellaria . . . 



Ferruginous sandstone, with Cytherea 



Silicified wood, with bark 



do bored by Teredo globosa.. .. 



A. lignite basin. 



Yellow arenaceous clay on cetaceous rocks 



Yellowish indurated clay, with fresh water shells 



over 296 



Gray sand, fine, over 297 



Coarse, gray, calcareous sandstone, with fossils... 



Soft argillo-calcareous shale, with fossil shells 



Ferruginous shale, with coniferous plants 



Dove colored sandstone, with eilicified wood 



Head of Little Missouri. 



do 



Cannon Ball river 



do 



— do 



do 



Long Lake 



do 



Long Lake 



do 



Top of Square butte. 



Thunder Butte 



do 



do 



