21hhdw.is ((GYPSUM)), $10 MINIMUM BID, Sheridan, Sheridan County, Wyoming, 4 x 4 x 3 cm Miniature | |
Dana has this as a Barite unknown location. Checking on Mindat.org. this is a match for Gypsum in Wyoming from a road cut on I-90 south of the Montana state line. Another says Road cut on hwy 14 noth of Sheridan that also matches. These are both probably the same formation listed on mindat.org. ex Dana Wilson MD collection # 785. |