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:
Carroll Mine, Sykesville, Carroll Co., Maryland, USA

Oldest recorded age at locality: 540
Youngest recorded age at locality: 444

mindat Locality ID: 9649
mindat URL: http://www.mindat.org/loc-9649.html

Tectonic Settings:

Total number of sublocalities beneath "Carroll Mine, Sykesville, Carroll Co., Maryland, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 39°22'0"N
Longitude: 76°58'"W
Decimal Degree (lat, lon): 39.366666666667,-76.966666666667
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: Al C Ca Co Cr Cu Fe H Mg O S Si 

Elements from minerals reported directly at this locality: Al C Ca Co Cr Cu Fe H Mg O S Si 

Structural Groups for minerals in this locality: 
AllophaneAmphiboleCalciteChalcanthiteClayClinozoisiteCorundumEpidoteMalachiteNone
Not in a structural groupQuartzSpinelTalc

15 IMA Minerals at location:
Actinolite  (*)Azurite  (*)Bornite  (*)Chalcanthite  (*)Chromite  (*)
Chrysocolla  (*)Epidote  (*)Hematite  (*)Linnaeite  (*)Magnetite  (*)
Malachite  (*)Quartz  (*)Siderite  (*)Talc  (*)Zoisite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Actinolite  (*)Amphibole   Ca2(Mg4.5-2.5Fe2+0.5-2.5)Si8O22(OH)254044403419
Azurite  (*)Not in a structural groupCu3(CO3)2(OH)254044405509
Bornite  (*)NoneCu5FeS454044405516
Chalcanthite  (*)ChalcanthiteCu(SO4)·5H2O5404440925
Chromite  (*)SpinelFe2+Cr2O454044403902
Chrysocolla  (*)Allophane(Cu2-xAlx)H2-xSi2O5(OH)4·nH2O54044403531
Epidote  (*)Epidote ClinozoisiteCa2(Al2Fe3+)[Si2O7][SiO4]O(OH)54044408173
Hematite  (*)CorundumFe2O3540444014640
Linnaeite  (*)SpinelCo2+Co3+2S45404440249
Magnetite  (*)SpinelFe2+Fe3+2O4540444014899
Malachite  (*)MalachiteCu2(CO3)(OH)2540444012537
Quartz  (*)QuartzSiO2540444061156
Siderite  (*)CalciteFe(CO3)54044406417
Talc  (*)Clay TalcMg3Si4O10(OH)254044403337
Zoisite  (*)EpidoteCa2Al3[Si2O7][SiO4]O(OH)54044401025


2 Ages assigned to this locality:

Excel IDMax Age (Ma)Min Age (Ma)Age as listed in referenceDating MethodAge InterpretPrioritized?Sample SourceSample NumRun NumAge from other LocalityDated MineralMinerals explicitely stated as having this ageAge applies to these ElementsMinDat Locality IDDated Locality (Max Age)Location as listed in referenceReferenceReference DOIReference IDAge Notes
Emily000556540444Cambrian-Ordovician     Yes  24179Sykesville, Carroll Co., Maryland, USASykesvilleRast and Horton (1989)10.1130/SPE228-p1GSA288_1 
Emily000557488470479±9  zircon  YesZirconZircon 24179Sykesville, Carroll Co., Maryland, USASykesvilleHorton et al. (2010)10.1130/2010.1206(25)GSA206_621 

SampleSource LocalityReference URL

All locality data graciously provided by mindat.org

All age data...

Other copyright data...