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:
Guam, USA

mindat Locality ID: 57494
mindat URL: http://www.mindat.org/loc-57494.html

Tectonic Settings:

Total number of sublocalities beneath "Guam, USA": 4
Total number of bottom-level sublocalities: 3

Number of Child Localities: 3
Child Localities:
Lamlan Ridge
Mt Santa Rosa
Umatac

Latitude: 13°24'17"N
Longitude: 144°44'55"E
Decimal Degree (lat, lon): 13.404722222222,144.74861111111

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.

Analcime	Calcite	Clay	Diaspore	Natrolite	None	Quartz	Smectite-vermiculite

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 Mg Na O Si

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Analcime Calcite Clay Diaspore Natrolite None Quartz Smectite-vermiculite

7 IMA Minerals at location:

Analcime ()*	Calcite ()*	Goethite ()*	Montmorillonite ()*	Natrolite ()*
Nordstrandite ()*	Quartz ()*

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Analcime ()*	Analcime	Na(AlSi₂O₆)·H₂O	1	203896	1627
Calcite ()*	Calcite	Ca(CO₃)	2	203894,203895	27770
Goethite ()*	Diaspore	FeO(OH)	1	203894	7437
Montmorillonite ()*	Clay Smectite-vermiculite	(Na,Ca)_0.3(Al,Mg)₂Si₄O₁₀(OH)₂·nH₂O	1	203894	1508
Natrolite ()*	Natrolite	Na₂(Si₃Al₂)O₁₀·2H₂O	1	203896	1236
Nordstrandite ()*	None	Al(OH)₃	2	203894,203895	64
Quartz ()*	Quartz	SiO₂	1	203894	61156

No ages have been assigned to this locality yet.

All locality data graciously provided by mindat.org

All age data...