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Contributed by Yale Peabody Museum of Natural History.
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Transcription
El Paso County
Hecla Clay mine
at Colo. Spgs.
Co Standard Fire Brick Co
adr 24th & albamys sts, Pueblo
mgn Stan. Fire Brk. Co.
adr Box 654, Pueblo
prod 1945 T plastic clay (C)
Laurel County
Fort Collins Brick & Tile Co Mine
at Fort Collins
Co Fort Collins Brick & Tile Co
adr 209 Colorado Bldg Fort Collins
mgn Fred Kilmer,
adr see above
prod 2500 T clay. (listed as clay + soft shale)