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:
Signal Peak, Cowlitz Co., Washington, USA

Oldest recorded age at locality: 35.6
Youngest recorded age at locality: 32.2

mindat Locality ID: 17952
mindat URL: http://www.mindat.org/loc-17952.html

Tectonic Settings:

Total number of sublocalities beneath "Signal Peak, Cowlitz Co., Washington, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 46°17'9"N
Longitude: 122°33'5"W
Decimal Degree (lat, lon): 46.285833333333,-122.55138888889

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	Mordenite	Natrolite	None	Not in a structural group	Quartz	Thomsonite

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 H K Mg Na O Si

Elements from minerals reported directly at this locality: Al C Ca H K Mg Na O Si

Structural Groups for minerals in this locality:
Analcime Calcite Mordenite Natrolite None Not in a structural group Quartz Thomsonite

8 IMA Minerals at location:

Analcime ()*	Calcite ()*	Epistilbite ()*	Gonnardite ()*	Mesolite ()*
Offretite ()*	Quartz ()*	Thomsonite-Ca ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Analcime ()*	Analcime	Na(AlSi₂O₆)·H₂O	35.6	32.2	1627
Calcite ()*	Calcite	Ca(CO₃)	35.6	32.2	27770
Epistilbite ()*	Mordenite	Ca₃[Si₁₈Al₆O₄₈]·16H₂O	35.6	32.2	138
Gonnardite ()*	Natrolite	(Na,Ca)₂(Si,Al)₅O₁₀·3H₂O	35.6	32.2	167
Mesolite ()*	Natrolite	Na₂Ca₂(Si₉Al₆)O₃₀·8H₂O	35.6	32.2	425
Offretite ()*	Not in a structural group	KCaMg(Si₁₃Al₅)O₃₆·15H₂O	35.6	32.2	146
Quartz ()*	Quartz	SiO₂	35.6	32.2	61156
Thomsonite-Ca ()*	Thomsonite	NaCa₂(Al₅Si₅)O₂₀·6H₂O	35.6	32.2	452

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
	NAVDAT-12884	35.6	32.2	33.9±1.7					12884						17952	Signal Peak, Cowlitz Co., Washington, USA		NAVDAT		NAVDAT

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...