National Pit & Mill (National Gypsum Company; Tawas Mine), Iosco Co., Michigan, USA
Latitude: 44°15'45"N
Longitude: 83°40'30"W
Commodities (Major) - Gypsum-Anhydrite
Development Status: Producer
Mineral List
No entries listed.
The above list 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
MICH MIN PROD, 1975, DEPT OF NAT RES, GEOL SURV DIV.
LEWIS, JERRY D., MICHIGAN MINERAL PRODUCERS DIRECTORY, DEPARTMENT OF NATURAL RESOURCES GEOLOGICAL SURVEY, 1975, PAGE 22-23.