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:
Rockland, Ontonagon Co., Michigan, USA


mindat Locality ID: 24796
mindat URL: http://www.mindat.org/loc-24796.html

Tectonic Settings:

Total number of sublocalities beneath "Rockland, Ontonagon Co., Michigan, USA": 6
Total number of bottom-level sublocalities: 6

Number of Child Localities: 6
Child Localities:
Bumblebee Mine
Michigan Mine
Minesota Mine (Minnesota Mine)
National Mine
Ontonagon Mine (1)
Rockland Mine

Latitude: 46°43'51"N
Longitude: 89°9'56"W
Decimal Degree (lat, lon): 46.730833333333,-89.165555555556
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: Ag Al Au B Ba C Ca Cl Cu Fe H K Mg Mo Na O S Si 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
AllophaneAnalcimeBaryteCalciteClayClinozoisiteConnelliteCopperEpidoteFeldspar
GadoliniteMalachiteNatroliteNoneNot in a structural groupPrehnitePumpellyiteQuartzScheeliteSmectite-vermiculite

22 IMA Minerals at location:
Analcime  (*)Azurite  (*)Baryte  (*)Calcite  (*)Chrysocolla  (*)
Connellite  (*)Copper  (*)Cuprite  (*)Datolite  (*)Dolomite  (*)
Epidote  (*)Gold  (*)Malachite  (*)Microcline  (*)Natrolite  (*)
Powellite  (*)Prehnite  (*)Pumpellyite-(Mg)  (*)Quartz  (*)Saponite  (*)
Silver  (*)Tenorite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Analcime  (*)AnalcimeNa(AlSi2O6)·H2O12227331627
Azurite  (*)Not in a structural groupCu3(CO3)2(OH)212227345509
Baryte  (*)BaryteBa(SO4)122273411547
Calcite  (*)CalciteCa(CO3)5222731,222732,222733,222734,22273627770
Chrysocolla  (*)Allophane(Cu2-xAlx)H2-xSi2O5(OH)4·nH2O2222733,2227343531
Connellite  (*)ConnelliteCu36(SO4)(OH)62Cl8·6H2O1222733295
Copper  (*)CopperCu5222731,222732,222733,222734,2227363846
Cuprite  (*)Not in a structural groupCu2O3222732,222733,2227342970
Datolite  (*)GadoliniteCaB(SiO4)(OH)4222731,222732,222733,222736498
Dolomite  (*)NoneCaMg(CO3)212227349895
Epidote  (*)Epidote ClinozoisiteCa2(Al2Fe3+)[Si2O7][SiO4]O(OH)5222731,222732,222733,222734,2227368173
Gold  (*)CopperAu122273330554
Malachite  (*)MalachiteCu2(CO3)(OH)22222733,22273412537
Microcline  (*)FeldsparK(AlSi3O8)2222731,2227324924
Natrolite  (*)NatroliteNa2(Si3Al2)O10·2H2O12227341236
Powellite  (*)ScheeliteCa(MoO4)1222733494
Prehnite  (*)PrehniteCa2Al(Si3Al)O10(OH)22222732,2227331898
Pumpellyite-(Mg)  (*)PumpellyiteCa2MgAl2(Si2O7)(SiO4)(OH)2·H2O4222732,222733,222734,222736106
Quartz  (*)QuartzSiO25222731,222732,222733,222734,22273661156
Saponite  (*)Clay Smectite-vermiculite(Ca,Na)0.3(Mg,Fe)3(Si,Al)4O10(OH)2·4H2O1222732301
Silver  (*)CopperAg4222732,222733,222734,2227365186
Tenorite  (*)NoneCuO12227331101


No ages have been assigned to this locality yet.
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