Mineral Evolution Database

Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.

Mineral locality data provided by mindat.org

The Mineral Evolution database is currently under development.

The goal of this page is to present localities at which the mineral is found, and estimates of the oldest possible geologic age of the minerals at these localities.

Locality Name:
Shannon Co., South Dakota, USA

mindat Locality ID: 20225
mindat URL: http://www.mindat.org/loc-20225.html

Tectonic Settings:

Total number of sublocalities beneath "Shannon Co., South Dakota, USA": 7
Total number of bottom-level sublocalities: 6

Number of Child Localities: 6
Child Localities:
Chadron Arch
Medicine Root Creek
Porcupine Creek
Quinn Draw
Rockyford
Sheep Mountain

Latitude: 43°36'59"N
Longitude: 102°31'30"W
Decimal Degree (lat, lon): 43.616388888889,-102.525

A	This mineral is Anthropogenic.
G	This mineral is directly dated.
B	This mineral is reported as having this age.
Y	This mineral is using an age reported as an element mineralization period.
O	This mineral is using an age calculated from all data at the locality.
R	The age displayed for this mineral originates from a different, non-child locality.
P	The age displayed for this mineral is the range of ages for this mineral at all of this locality's children.
	This mineral's age has not yet been recorded.

Baryte	Beryl	Calcite	Corundum	Cristobalite	Gypsum	None	Not in a structural group	Pyrite	Quartz
Tridymite

This Mineral list contains entries from this locality, including sub-localities. Minerals in bold are reported by mindat.org as occurring directly at this locality, and do not occur at any children (sublocalities) of this locality.

Elements at this locality, including sub-localities: Al Ba C Ca Fe H Mg Mn Mo O S Si

Elements from minerals reported directly at this locality: Ba C Ca Fe Mn O S

Structural Groups for minerals in this locality:
Baryte Beryl Calcite Corundum Cristobalite Gypsum None Not in a structural group Pyrite Quartz
Tridymite

12 IMA Minerals at location:

Anhydrite ()*	Baryte ()*	Cristobalite ()*	Gypsum ()*	Hematite ()*
Ilsemannite ()*	Indialite ()*	Pyrite ()*	Quartz ()*	Rhodochrosite ()*
Siderite ()*	Tridymite ()*

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Anhydrite ()*	Not in a structural group	Ca(SO₄)	0		1588
Baryte ()*	Baryte	Ba(SO₄)	0		11547
Cristobalite ()*	Cristobalite	SiO₂	1	266256	453
Gypsum ()*	Gypsum	Ca(SO₄)·2H₂O	2	266258,266261	6890
Hematite ()*	Corundum	Fe₂O₃	1	266256	14640
Ilsemannite ()*	None	Mo₃O₈·nH₂O (?)	1	266259	123
Indialite ()*	Beryl	Mg₂Al₃(AlSi₅)O₁₈	1	266256	24
Pyrite ()*	Pyrite	FeS₂	0		39462
Quartz ()*	Quartz	SiO₂	3	266257,266259,266260	61156
Rhodochrosite ()*	Calcite	Mn(CO₃)	0		1711
Siderite ()*	Calcite	Fe(CO₃)	0		6417
Tridymite ()*	Tridymite	SiO₂	1	266256	458

No ages have been assigned to this locality yet.

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...