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:
Woodstock, Howard Co., Maryland, USA

Oldest recorded age at locality: 1231.5
Youngest recorded age at locality: 938

mindat Locality ID: 43888
mindat URL: http://www.mindat.org/loc-43888.html

Tectonic Settings:

Total number of sublocalities beneath "Woodstock, Howard Co., Maryland, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 39°19'41"N
Longitude: 76°52'22"W
Decimal Degree (lat, lon): 39.328055555556,-76.872777777778

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.

Clinozoisite	Epidote	None	Pyrite	Quartz	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 Ca Fe H O S Si Ti

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

Structural Groups for minerals in this locality:
Clinozoisite Epidote None Pyrite Quartz Titanite

4 IMA Minerals at location:

Epidote ()*	Pyrite ()*	Quartz ()*	Titanite ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)	1231.5	938	8173
Pyrite ()*	Pyrite	FeS₂	1231.5	938	39462
Quartz ()*	Quartz	SiO₂	1231.5	938	61156
Titanite ()*	Titanite	CaTi(SiO₄)O	1231.5	938	4899

3 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Sample Source	Dated Mineral	MinDat Locality ID	Dated Locality (Max Age)	Reference	Reference ID
USGS-U-Th-Pb-00758_206_238	968	938	953±15	206_238	zircon	Zircon	43888	Woodstock, Howard Co., Maryland, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00758_207_206	1231.5	1201.5	1216.5±15	207_206	zircon	Zircon	43888	Woodstock, Howard Co., Maryland, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00758_207_235	1051.3	1021.3	1036.3±15	207_235	zircon	Zircon	43888	Woodstock, Howard Co., Maryland, USA	USGS-U-Th-Pb	USGS-U-Th-Pb

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...