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

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.

Amphibole	Clay	Corundum	Garnet	Marcasite	Mica	Nickeline	None	Not in a structural group	Pyrite
Quartz	Staurolite	Titanite

Actinolite ()*	Almandine ()*	Graphite ()*	Ilmenite ()*	Marcasite ()*
Muscovite ()*	Phlogopite ()*	Pyrite ()*	Pyrrhotite ()*	Quartz ()*
Sillimanite ()*	Staurolite ()*	Titanite ()*	Tremolite ()*

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:
Amphibole Clay Corundum Garnet Marcasite Mica Nickeline None Not in a structural group Pyrite
Quartz Staurolite Titanite

14 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Actinolite ()*	Amphibole	Ca₂(Mg_4.5-2.5Fe²⁺_0.5-2.5)Si₈O₂₂(OH)₂	171	171	0		3419
Almandine ()*	Garnet	Fe²⁺₃Al₂(SiO₄)₃	171	171	0		2353
Graphite ()*	None	C	171	171	1	241957	2812
Ilmenite ()*	Corundum	Fe²⁺Ti⁴⁺O₃	171	171	0		5433
Marcasite ()*	Marcasite	FeS₂	171	171	0		5674
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	171	171	0		17380
Phlogopite ()*	Mica Clay	KMg₃(AlSi₃O₁₀)(OH)₂	171	171	0		2273
Pyrite ()*	Pyrite	FeS₂	171	171	0		39462
Pyrrhotite ()*	Nickeline	Fe₇S₈	171	171	0		9056
Quartz ()*	Quartz	SiO₂	171	171	0		61156
Sillimanite ()*	Not in a structural group	Al₂SiO₅	171	171	0		1516
Staurolite ()*	Staurolite	Fe²⁺₂Al₉Si₄O₂₃(OH)	171	171	0		978
Titanite ()*	Titanite	CaTi(SiO₄)O	171	171	0		4899
Tremolite ()*	Amphibole	Ca₂(Mg_5.0-4.5Fe²⁺_0.0-0.5)Si₈O₂₂(OH)₂	171	171	0		2562

Locality Notes from all Ages at Locality:

Age ID	Locality Notes
AREPS5_257-00014	There 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 ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Prioritized?	Sample Source	Sample Num	Run Num	Age from other Locality	Dated Mineral	Minerals explicitely stated as having this age	Age applies to these Elements	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID	Age Notes
	AREPS5_257-00035	171	171	171											9393	Monadnock Mountain (Mount Monadnock), Jaffrey, Cheshire Co., New Hampshire, USA	Mount Monadnock	Zartman (1977)	10.1146/annurev.ea.05.050177.001353	AREPS5_257
	AREPS5_257-00014	171	171	171							Yes				220659	Monadnock Mountain (Mount Monadnock), Lemington, Essex Co., Vermont, USA	Mount Monadnock	Zartman (1977)	10.1146/annurev.ea.05.050177.001353	AREPS5_257

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...