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North America
United States
Iowa
Dubuque
Previously called ''
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Location
Lat / long:
42.50834, -90.85985
Resource(N)
Primary:
Phosphorus-Phosphates
Production
Operation type:
Unknown
Production size:
Small
Development status:
Past Producer
Geology
Host rock:
Maquoketa Shale
Host type:
Phosphorite
References
MRDS
W044565
DEP
10082056
Reference
F1 < BROWN, C. E., 1974, PHOSPHATIC ZONE IN THE LOWER PART OF THE MAQUOKETA SHALE IN NORTHEAST IOWA: U.S. GEOLOGICAL SURVEY JOURNAL OF RESEARCH, V. 2, NO. 2, P. 219-232
Reporter
Miller, M.