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

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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:
Cook Co., Illinois, USA


mindat Locality ID: 168994
mindat URL: http://www.mindat.org/loc-168994.html

Tectonic Settings:

Total number of sublocalities beneath "Cook Co., Illinois, USA": 49
Total number of bottom-level sublocalities: 48

Number of Child Localities: 48
Child Localities:
A. C. O'Laughlin Stone Company Quarry
Barge Slip Quarry
Bellwood Quarry
Brownell Improvement Company Quarry
Chicago
Chicago Heights City Engineering
Chicago Union Lime Works Quarry
City Of Calumet - Own Crews
City Of Chicago Engineering - Own Crews
Cook County Highway Department - Own Crews
Dolese And Shepard Crushed Stone
Elmhurst-McCarthy Joint
Evanston
Evanston City Engineering
Federal Quarry & Mill
Glencoe City Engineering - Own Crews
Grand And Campbell Avenue Quarry
Hoffman Estates City Engineering - Own Crews
Illinois Stone Company Quarry
Lemont Quarry Consumers Company
Limestone Prospect (MRDS - 10241773)
Lyons Quarry
Markham City Department Of Public Works
McCook Yard No. 387 & Mill
Melrose Park City Engineering - Own Crews
Morton Grove City Engineering - Own Crews
Mount Prospect City Engineering
Niles City Department Of Public Works
Northbrook City Department Of Public Work
Northlake City Engineering - Own Crews
Palatine City Engineering - Own Crews
Park Forest
River Forest City Engineering - Own Crews
Riverside Lime And Stone Company Quarry
Rolling Meadows Department Of Public Works
Stearns Lime And Stone Company Quarry
Stony Island Quarries
Summit Quarry Consumers Company
Superior Stone Company Quarry
Thornton Quarry & Mill
Thornton Underground Mine No. 2
Unnamed Limestone Quarry (MRDS - 10193709)
West Chester City Engineering - Own Crews
Wester Springs City Engineering - Own Crews
Wilmette City Engineering - Own Crews
Winnetka City Engineering - Own Crews
Yard No. 22 Clay Pit
Yard R Clay Pit

Latitude: 41°50'8"N
Longitude: 87°48'56"W
Decimal Degree (lat, lon): 41.835555555556,-87.815555555556

AThis mineral is Anthropogenic.
GThis mineral is directly dated.
BThis mineral is reported as having this age.
YThis mineral is using an age reported as an element mineralization period.
OThis mineral is using an age calculated from all data at the locality.
RThe age displayed for this mineral originates from a different, non-child locality.
PThe 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.

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 O S 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
CalciteMarcasiteNonePyriteSpinel

5 IMA Minerals at location:
Calcite  (*)Magnetite  (*)Marcasite  (*)Pyrite  (*)Troilite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Calcite  (*)CalciteCa(CO3)121241427770
Magnetite  (*)SpinelFe2+Fe3+2O4121241414899
Marcasite  (*)MarcasiteFeS212124145674
Pyrite  (*)PyriteFeS2121241439462
Troilite  (*)NoneFeS12124421044



No ages have been assigned to this locality yet.

SampleSource LocalityReference URL


All locality data graciously provided by mindat.org

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