123 



MINERALS AND GEOLOGICAL SPECIMENS. 



1 



2 



3 



4 



5 



6 



7 



8 



9 



10 



11 



12 



13 



14 



15 



16 



17 



18 



19 



20 



21 



22 



53 



24 



25 



26 



127 



28 



29 



30 



31 



32 



33 



34 



35 



36 



37 



38 



39 



40 

 41 

 42 

 43 

 44 

 45 

 46 

 47 

 48 

 49 

 58 

 51 

 52 

 53 

 54 

 55 

 56 

 57 



I. IGNEOUS AND METAMOUPHIC KOCKS. 



Gneisa ferruginous 



Mica elate - 



Mica, more micaceoua 



Granite, coarse — — 



Mica slate, with silvery mica 



Grauite, pulverulent - 



Felspar, flesh-colored from No. 6 



Granite, fine grained, micaceous 



Granite, gray - 



Quartz, white 



Hornblende slate - 



Hornblende rock 



Mica slate 



Hornblende rock in granite 



Red felspar from 14 



Crystalline quartz from 14 



Flesh-colored felspar from 14 



Mica slate, with garnets 



Mica slate, with garnets 



Mica, containing iron 



Flesh-colored felspar in large crystals 



Chlorite slate 



Mica slate 



Granite, coarse, over No. 23 



Felspathic granite, pink 



Quartz veins in 25 



Hornblende rock, masses in granite 



Granite, fine grained 



Hornblende rock 



Hornblendic granite 



Hornblende, with crystals of felspar 



Mica slate, hornblendic 



Mica slate, hornblendic • 



Mica slate, with large plates of mica 



Granite, white felspathic 



Quartz, veins in 35 



Silicious limestone, silurian or devonian 



do ...do.. highly crystalline 



do do do 



Syenite, pink, under 39 



Metamorphic silicious limestone 



do do purplish 



Quartz, in granite 



Metamorphic limestone, gray 



Mica slate 



Micaceous granite....- 



do 



Mica slate, fine gr^ned 



Metamorphic limestone, crystalline 



.-..do do purplish 



— do do similar to 43 



Talcose slate 



Felspathic granite, flesh-colored 



Mica slate, with garnets 



do very fine grained 



Talcose slate, dark - , 



do light 



Porphyritic trap - -. 



12 miles northwest of Fort Laramie 



do do. . 



do do 



Laramie peak 



4 miles north of Fort Laramie .... 



Raw Hide butte 



do 



do 



Laramie hills....... 



do 



.do. 

 .do. 

 .do. 

 -do. 

 .do. 

 .do. 

 .do. 

 .do. 

 .do. 

 .do. 

 .do. 

 .do. 

 .do. 

 .do. 

 .do. 

 .do. 

 .do. 

 .do. 

 .do. 

 .do. 

 .do. 

 .do. 

 .do. 

 .do. 

 .do. 

 .do. 

 .do. 

 .do. 

 .do. 



do 



Raw Hide butte. 

 , do 



, do. 



do. 



do. 



do. 



do. 



do. 



.......do. 



, do. 



, do. 



do. 



do. 



, do. 



do. 



do. 



, do. 



Black hills 



