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:
Mifflin Area Mines, Upper Mississippi Valley District, Iowa Co., Wisconsin, USA

mindat Locality ID: 250002
mindat URL: http://www.mindat.org/loc-250002.html

Tectonic Settings:

Total number of sublocalities beneath "Mifflin Area Mines, Upper Mississippi Valley District, Iowa Co., Wisconsin, USA": 19
Total number of bottom-level sublocalities: 19

Number of Child Localities: 19
Child Localities:
Clayton Mine
Defense Mine
Lucky Six Mine
Mifflin Mine
New Gruno Mine
Okay Mine
Old Gruno Mine (Miller Mine)
Old Slack Mine
Old Squirrel Mine
Peacock Mine
Shellwin Mines
Silver Dollar Mine
Slack Mine
Squirrel Mine
Unnamed Pb Mine [01]
Unnamed Pb Pits [02]
Unnamed Pb Pits [03]
Unnamed Zn Mines [01]
Wells Mines

Latitude: 42°52'19"N
Longitude: 90°20'29"W
Decimal Degree (lat, lon): 42.871944444444,-90.341388888889

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	Marcasite	None	Pyrite	Quartz	Rocksalt	Sphalerite

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 Fe Mg O Pb S Si Zn

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Calcite Marcasite None Pyrite Quartz Rocksalt Sphalerite

7 IMA Minerals at location:

Calcite ()*	Dolomite ()*	Galena ()*	Marcasite ()*	Pyrite ()*
Quartz ()*	Sphalerite ()*

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Calcite ()*	Calcite	Ca(CO₃)	12	287896,287897,287898,287899,287900,287901,287902,287903,287905,287907,287908,287909	27770
Dolomite ()*	None	CaMg(CO₃)₂	11	287896,287897,287898,287900,287901,287902,287903,287905,287907,287908,287909	9895
Galena ()*	Rocksalt	PbS	6	287898,287901,287905,287907,287908,287909	24243
Marcasite ()*	Marcasite	FeS₂	1	287907	5674
Pyrite ()*	Pyrite	FeS₂	10	287896,287897,287898,287900,287901,287902,287903,287905,287908,287909	39462
Quartz ()*	Quartz	SiO₂	10	287896,287897,287898,287900,287901,287902,287903,287905,287908,287909	61156
Sphalerite ()*	Sphalerite	ZnS	11	287896,287897,287898,287900,287901,287902,287903,287905,287907,287908,287909	21482

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...