Mineral Evolution Database
Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.
Mineral locality data provided by mindat.org

Ages for Gold at Grants Mine (Hidden Fortune Mine; Sula Claim; Brunnett Claim; St. Patrick Claim; Swamp Eagle Claim; Bingham Claim; Grant Reddy Claim; Iowa Claim; Golden Crown Claim), Lead District, Lawrence Co., South Dakota, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 58Ma - 40Ma at this locality

Locality age

Excel ID	Max Age (Ma)	Min Age (Ma)	Dated Locality ID	Dated Locality	Ref	Ref ID
NAVDAT-4740	55	40	11496	Grants Mine (Hidden Fortune Mine; Sula Claim; Brunnett Claim; St. Patrick Claim; Swamp Eagle Claim; Bingham Claim; Grant Reddy Claim; Iowa Claim; Golden Crown Claim), Lead District, Lawrence Co., South Dakota, USA	NAVDAT	NAVDAT
NAVDAT-92295	58	46	11496	Grants Mine (Hidden Fortune Mine; Sula Claim; Brunnett Claim; St. Patrick Claim; Swamp Eagle Claim; Bingham Claim; Grant Reddy Claim; Iowa Claim; Golden Crown Claim), Lead District, Lawrence Co., South Dakota, USA	NAVDAT	NAVDAT
NAVDAT-92298	58	46	11496	Grants Mine (Hidden Fortune Mine; Sula Claim; Brunnett Claim; St. Patrick Claim; Swamp Eagle Claim; Bingham Claim; Grant Reddy Claim; Iowa Claim; Golden Crown Claim), Lead District, Lawrence Co., South Dakota, USA	NAVDAT	NAVDAT