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:
North Sister Mountain, McKenzie Pass, Lane Co., Oregon, USA

mindat Locality ID: 281640
mindat URL: http://www.mindat.org/loc-281640.html

Tectonic Settings:

Total number of sublocalities beneath "North Sister Mountain, McKenzie Pass, Lane Co., Oregon, USA": 1
Total number of bottom-level sublocalities: 1

Number of Child Localities: 1
Child Localities:
Obsidian Cliffs

Latitude: 44°10'46"N
Longitude: 121°50'22"W
Decimal Degree (lat, lon): 44.179444444444,-121.83944444444

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.

Clay	Corundum	Mica	Milarite	None	Olivine	Tridymite

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 Fe H K Mg O Si

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Clay Corundum Mica Milarite None Olivine Tridymite

7 IMA Minerals at location:

Fayalite ()*	Hematite ()*	Laihunite ()*	Osumilite ()*	Osumilite-(Mg) ()*
Phlogopite ()*	Tridymite ()*

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Fayalite ()*	Olivine	Fe²⁺₂(SiO₄)	1	260820	371
Hematite ()*	Corundum	Fe₂O₃	1	260820	14640
Laihunite ()*	None	(Fe³⁺,Fe²⁺, )₂(SiO₄)	1	260820	15
Osumilite ()*	Milarite	KFe₂(Al₅Si₁₀)O₃₀	1	260820	15
Osumilite-(Mg) ()*	Milarite	KMg₂Al₃(Al₂Si₁₀)O₃₀	1	260820	42
Phlogopite ()*	Mica Clay	KMg₃(AlSi₃O₁₀)(OH)₂	1	260820	2273
Tridymite ()*	Tridymite	SiO₂	1	260820	458

No ages have been assigned to this locality yet.

Sample	Source Locality	Reference URL
FKM-240	Obsidian Cliffs, North Sister Mountain, McKenzie Pass, Lane Co., Oregon, USA	https://www.rockptx.com/fkm-226-to-fkm-250/#FKM-240

All locality data graciously provided by mindat.org

All age data...