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:
Linn Co., Iowa, USA

mindat Locality ID: 49189
mindat URL: http://www.mindat.org/loc-49189.html

Tectonic Settings:

Total number of sublocalities beneath "Linn Co., Iowa, USA": 6
Total number of bottom-level sublocalities: 5

Number of Child Localities: 5
Child Localities:
Cedar Rapids (Martin Marietta) Quarry
Central City
Marion (Iowa) Meteorite
Robins
Walker Area

Latitude: 42°4'35"N
Longitude: 91°37'2"W
Decimal Degree (lat, lon): 42.076388888889,-91.617222222222

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.

Calcite	Cubanite	Iron	Marcasite	None	Pyrite	Quartz	Sphalerite	Spinel

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: C Ca Cr Cu Fe Mg Ni O S Si Zn

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Calcite Cubanite Iron Marcasite None Pyrite Quartz Sphalerite Spinel

12 IMA Minerals at location:

Calcite ()*	Chromite ()*	Dolomite ()*	Iron ()*	Isocubanite ()*
Mackinawite ()*	Marcasite ()*	Pyrite ()*	Quartz ()*	Sphalerite ()*
Taenite ()*	Troilite ()*

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Calcite ()*	Calcite	Ca(CO₃)	3	214885,214886,214889	27770
Chromite ()*	Spinel	Fe²⁺Cr₂O₄	1	214887	3902
Dolomite ()*	None	CaMg(CO₃)₂	1	214885	9895
Iron ()*	Iron	Fe	1	214887	1089
Isocubanite ()*	Sphalerite Cubanite	CuFe₂S₃	1	214887	191
Mackinawite ()*	None	(Fe,Ni)_1+xS (x = 0-0.07)	1	214887	451
Marcasite ()*	Marcasite	FeS₂	2	214885,214889	5674
Pyrite ()*	Pyrite	FeS₂	2	214885,214889	39462
Quartz ()*	Quartz	SiO₂	3	214885,214889,214890	61156
Sphalerite ()*	Sphalerite	ZnS	1	214885	21482
Taenite ()*	None	(Ni,Fe)	1	214887	703
Troilite ()*	None	FeS	1	214887	1044

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...