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:
Monadnock Mountain (Mount Monadnock), Jaffrey, Cheshire Co., New Hampshire, USA

Oldest recorded age at locality: 171
Youngest recorded age at locality: 171

mindat Locality ID: 9393
mindat URL: http://www.mindat.org/loc-9393.html

Tectonic Settings:

Total number of sublocalities beneath "Monadnock Mountain (Mount Monadnock), Jaffrey, Cheshire Co., New Hampshire, USA": 1
Total number of bottom-level sublocalities: 1

Number of Child Localities: 1
Child Localities:
Graphite Mine (Old Lead Mine)

Latitude: 42°51'30"N
Longitude: 72°6'33"W
Decimal Degree (lat, lon): 42.858333333333,-72.109166666667

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 Fe H K Mg O S Si Ti 

Elements from minerals reported directly at this locality: Al Ca Fe H K Mg O S Si Ti 

Structural Groups for minerals in this locality: 
AmphiboleClayCorundumGarnetMarcasiteMicaNickelineNoneNot in a structural groupPyrite
QuartzStauroliteTitanite

14 IMA Minerals at location:
Actinolite  (*)Almandine  (*)Graphite  (*)Ilmenite  (*)Marcasite  (*)
Muscovite  (*)Phlogopite  (*)Pyrite  (*)Pyrrhotite  (*)Quartz  (*)
Sillimanite  (*)Staurolite  (*)Titanite  (*)Tremolite  (*)
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)217117103419
Almandine  (*)GarnetFe2+3Al2(SiO4)317117102353
Graphite  (*)NoneC17117112419572812
Ilmenite  (*)CorundumFe2+Ti4+O317117105433
Marcasite  (*)MarcasiteFeS217117105674
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)2171171017380
Phlogopite  (*)Mica ClayKMg3(AlSi3O10)(OH)217117102273
Pyrite  (*)PyriteFeS2171171039462
Pyrrhotite  (*)NickelineFe7S817117109056
Quartz  (*)QuartzSiO2171171061156
Sillimanite  (*)Not in a structural groupAl2SiO517117101516
Staurolite  (*)StauroliteFe2+2Al9Si4O23(OH)1711710978
Titanite  (*)TitaniteCaTi(SiO4)O17117104899
Tremolite  (*)Amphibole   Ca2(Mg5.0-4.5Fe2+0.0-0.5)Si8O22(OH)217117102562



Locality Notes from all Ages at Locality:
Age IDLocality Notes
AREPS5_257-00014There are two Mount Monadnock's in mindat, one in NH one in VT, neither match the GPS listed in this record, but the GPS here is in N. VT near the border w/ NH.


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
AREPS5_257-00035171171171        9393Monadnock Mountain (Mount Monadnock), Jaffrey, Cheshire Co., New Hampshire, USAMount MonadnockZartman (1977)10.1146/annurev.ea.05.050177.001353AREPS5_257 
AREPS5_257-00014171171171     Yes  220659Monadnock Mountain (Mount Monadnock), Lemington, Essex Co., Vermont, USAMount MonadnockZartman (1977)10.1146/annurev.ea.05.050177.001353AREPS5_257 


SampleSource LocalityReference URL


All locality data graciously provided by mindat.org

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