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:
Iona Island, Bear Mountain State Park, Rockland Co., New York, USA

Oldest recorded age at locality: 1190
Youngest recorded age at locality: 1104

mindat Locality ID: 175656
mindat URL: http://www.mindat.org/loc-175656.html

Tectonic Settings:

Total number of sublocalities beneath "Iona Island, Bear Mountain State Park, Rockland Co., New York, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 41°18'23"N
Longitude: 73°58'54"W
Decimal Degree (lat, lon): 41.306388888889,-73.981666666667

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.

Calcite	None	Pyroxene	Scapolite	Titanite

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 O Si Ti

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

Structural Groups for minerals in this locality:
Calcite None Pyroxene Scapolite Titanite

4 IMA Minerals at location:

Calcite ()*	Hedenbergite ()*	Meionite ()*	Titanite ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Calcite ()*	Calcite	Ca(CO₃)	1190	1104	27770
Hedenbergite ()*	Pyroxene	CaFe²⁺Si₂O₆	1190	1104	741
Meionite ()*	Scapolite	Ca₄Al₆Si₆O₂₄(CO₃)	1190	1104	176
Titanite ()*	Titanite	CaTi(SiO₄)O	1190	1104	4899

3 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Sample Source	MinDat Locality ID	Dated Locality (Max Age)	Reference	Reference ID
USGS-Rb-Sr-05878	1190	1104	1147±43	Rb-Sr	age of metamorphic crystallization	whole rock	175656	Iona Island, Bear Mountain State Park, Rockland Co., New York, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-05879	1190	1104	1147±43	Rb-Sr	age of metamorphic crystallization	whole rock	175656	Iona Island, Bear Mountain State Park, Rockland Co., New York, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-05880	1190	1104	1147±43	Rb-Sr	age of metamorphic crystallization	whole rock	175656	Iona Island, Bear Mountain State Park, Rockland 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...