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:
Armstrong Property, Shannon Butte, Coastal Range, Trinity Co., California, USA

mindat Locality ID: 211482
mindat URL: http://www.mindat.org/loc-211482.html

Tectonic Settings:

Total number of sublocalities beneath "Armstrong Property, Shannon Butte, Coastal Range, Trinity Co., California, USA": 3
Total number of bottom-level sublocalities: 3

Number of Child Localities: 3
Child Localities:
Armstrong No. 1 Prospect (Virginia Bruce)
Armstrong No. 2 Prospect (Savage Nos. 2 And 3 Prospects)
Armstrong No. 3 Prospect

Latitude: 40°11'20"N
Longitude: 123°18'12"W
Decimal Degree (lat, lon): 40.188888888889,-123.30333333333

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.

Allophane	Calcite	Clay	Malachite	None	Pyrite	Spinel

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: C Cu Fe H Mn O S Si

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Allophane Calcite Clay Malachite None Pyrite Spinel

6 IMA Minerals at location:

Bementite ()*	Hausmannite ()*	Malachite ()*	Neotocite ()*	Pyrite ()*
Rhodochrosite ()*

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Bementite ()*	Clay	Mn₇Si₆O₁₅(OH)₈	1	180931	173
Hausmannite ()*	Spinel	Mn²⁺Mn³⁺₂O₄	1	180931	350
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂	1	180931	12537
Neotocite ()*	Allophane	(Mn,Fe)SiO₃·H₂O (?)	1	180932	186
Pyrite ()*	Pyrite	FeS₂	1	180932	39462
Rhodochrosite ()*	Calcite	Mn(CO₃)	2	180931,180932	1711

No ages have been assigned to this locality yet.

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...