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| GEOLOGICAL AGE. 
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LOCALITY. 
White Pine, Nev. 
| Eau Claire, Wis. 
| ee ce 
| Ute Park, Utah. 
| White Pine, Nev. 
Hudson, Wis. 
| Castle Creek, Blk. 
| Berlin, Wis. 
| Eau Claire, Wis. 
| Castle Creek, Wis. 
| White Pine, Nev. 
Schell Creek, Nev. 
Eureka, Nev. 
_ Pogonip Mts., Nev. 
_ Camp Baker, Mont. 
| Eureka Nev. 
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Hills. 
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Call’s Fort, Utah. 
| Eureka, Nev. 
| Lebanon, Ohio. 
| Baraboo, Wis. 
Lodi, Wis. 
| Baraboo, Wis. 
| White Pine, Nev 
| Call’s Fort, Utah. 
Eureka, Nev. 
| Lodi, Wis. 
| Prairie du Sac, Wis. 
| Mazomania, Wis. 
| Eureka, Nev. 
| Ute Park, Utah. 
| Call’s Fort, Utah. 
Hudson, Wis. 
| Yellow Springs, Ohio. 
Put-in-Bay Island, Lake Erie. 
(182) 
