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:
Cortlandt Township, Westchester Co., New York, USA

Oldest recorded age at locality: 385
Youngest recorded age at locality: 357

mindat Locality ID: 16852
mindat URL: http://www.mindat.org/loc-16852.html

Tectonic Settings:

Total number of sublocalities beneath "Cortlandt Township, Westchester Co., New York, USA": 11
Total number of bottom-level sublocalities: 7

Number of Child Localities: 7
Child Localities:
Anthony's Nose
Cortland Manor
Croton-on-Hudson
DiRubbo Emery Quarry
Montrose
Toddville
Verplanck

Latitude: 41°16'18"N
Longitude: 73°55'27"W
Decimal Degree (lat, lon): 41.271666666667,-73.924166666667

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.

Amorphous	Amphibole	Analcime	Beryl	Calcite	Chalcopyrite	Clay	Clinozoisite	Corundum	Epidote
Feldspar	Garnet	Mica	Molybdenite	Natrolite	Nickeline	None	Not in a structural group	Pyrite	Quartz
Sapphirine	Serpentine	Spinel	Staurolite

Actinolite ()*	Albite ()*	Almandine ()*	Analcime ()*	Calcite ()*
Chalcopyrite ()*	Chrysotile ()*	Cordierite ()*	Corundum ()*	Epidote ()*
Hercynite ()*	Kyanite ()*	Magnesio-riebeckite ()*	Magnesiohögbomite-6N6S ()*	Magnetite ()*
Molybdenite ()*	Muscovite ()*	Natrolite ()*	Opal ()*	Phlogopite ()*
Pyrite ()*	Pyrrhotite ()*	Quartz ()*	Sapphirine ()*	Sillimanite ()*
Spinel ()*	Staurolite ()*

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 Cu Fe H K Mg Mo Na O S Si Ti

Elements from minerals reported directly at this locality: Al Fe O Si

Structural Groups for minerals in this locality:
Amorphous Amphibole Analcime Beryl Calcite Chalcopyrite Clay Clinozoisite Corundum Epidote
Feldspar Garnet Mica Molybdenite Natrolite Nickeline None Not in a structural group Pyrite Quartz
Sapphirine Serpentine Spinel Staurolite

27 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			1	248985	3419
Albite ()*	Feldspar	Na(AlSi₃O₈)			2	248975,248981	8803
Almandine ()*	Garnet	Fe²⁺₃Al₂(SiO₄)₃	385	357	0		2353
Analcime ()*	Analcime	Na(AlSi₂O₆)·H₂O	385	357	2	248979,248983	1627
Calcite ()*	Calcite	Ca(CO₃)			5	248975,248979,248981,248984,248985	27770
Chalcopyrite ()*	Chalcopyrite	CuFeS₂			1	248975	27198
Chrysotile ()*	Serpentine Clay	Mg₃Si₂O₅(OH)₄			1	248985	951
Cordierite ()*	Beryl	Mg₂Al₄Si₅O₁₈			1	248979	1008
Corundum ()*	Corundum	Al₂O₃	385	357	3	248979,248981,248983	1797
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)			2	248975,248976	8173
Hercynite ()*	Spinel	Fe²⁺Al₂O₄			1	248981	407
Kyanite ()*	Not in a structural group	Al₂OSiO₄			1	248981	1507
Magnesio-riebeckite ()*	Amphibole	Na₂(Mg₃Fe³⁺₂)Si₈O₂₂(OH)₂			1	248976	93
Magnesiohögbomite-6N6S ()*	None	(Mg,Al,Fe)₃(Al,Ti)₈O₁₅(OH)			1	248981	3
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	385	357	4	248975,248979,248981,248983	14899
Molybdenite ()*	Molybdenite	MoS₂			1	248975	5800
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂			1	248981	17380
Natrolite ()*	Natrolite	Na₂(Si₃Al₂)O₁₀·2H₂O			1	248975	1236
Opal ()*	Amorphous	SiO₂·nH₂O	385	357	2	248981,248983	2994
Phlogopite ()*	Mica Clay	KMg₃(AlSi₃O₁₀)(OH)₂			1	248985	2273
Pyrite ()*	Pyrite	FeS₂			1	248975	39462
Pyrrhotite ()*	Nickeline	Fe₇S₈			1	248975	9056
Quartz ()*	Quartz	SiO₂			4	248975,248976,248981,248985	61156
Sapphirine ()*	Sapphirine	Mg₄(Mg₃Al₉)O₄[Si₃Al₉O₃₆]			1	248979	129
Sillimanite ()*	Not in a structural group	Al₂SiO₅			1	248981	1516
Spinel ()*	Spinel	MgAl₂O₄			1	248981	1934
Staurolite ()*	Staurolite	Fe²⁺₂Al₉Si₄O₂₃(OH)			2	248981,248985	978

1 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
	USGS-Rb-Sr-07109	385	357	371±14	Rb-Sr	age of intrusion		whole rock							23534	Strang Emery Pit, Toddville, Cortlandt Township, Westchester Co., New York, USA		USGS-Rb-Sr		USGS-Rb-Sr

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...