Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Howe , Alexander and Sellars mine, Dubuque, Dubuque County, Iowa, USAi
Regional Level Types
Howe ，Alexander and Sellars mineMine
DubuqueCity
Dubuque CountyArea
IowaState
USACountry
Howe ，Alexander and Sellars mine, Upper Mississippi Valley Zinc-Lead District, USA

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Latitude & Longitude (WGS84):
42° 30' 6'' North , 90° 40' 26'' West
Latitude & Longitude (decimal):
42.50170,-90.67414
GRN:
N29W48
Type:
Mine
Köppen climate type:
Dfa : Hot-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Dubuque58,799 (2018)0.8km
East Dubuque1,658 (2017)2.8km
Sageville103 (2017)6.4km
Asbury5,291 (2017)6.5km
Sandy Hook309 (2017)7.0km
Mindat Locality ID:
355495
Long-form identifier:
mindat:1:2:355495:4
GUID (UUID V4):
0


11th & Spruce. Mine started in 1892

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


List of minerals for each chemical element

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic Plate
USA

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Leonard, A. G. (1896). Lead and zinc deposits of Iowa (Vol. 6). Published for the Iowa Geological Survey.
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