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 Gypsum at Meade Co., South Dakota, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 83.6Ma - 72.1Ma at this locality

Age range from children

Excel ID	Max Age (Ma)	Min Age (Ma)	Dated Mineral	Minerals explicitely stated as having this age	Age applies to these Elements	Dated Locality ID	Dated Locality	Ref	Ref ID
Michelle_575	83.6	72.1		Whewellite		4116	Meade Co., South Dakota, USA	Campbell and Roberts (1986)	MR17_131

Locality age

Excel ID	Max Age (Ma)	Min Age (Ma)	Dated Mineral	Minerals explicitely stated as having this age	Age applies to these Elements	Dated Locality ID	Dated Locality	Ref	Ref ID
Michelle_575	83.6	72.1		Whewellite		4116	Meade Co., South Dakota, USA	Campbell and Roberts (1986)	MR17_131
NAVDAT-92274	58	46				44879	Bear Butte, Meade Co., South Dakota, USA	NAVDAT	NAVDAT