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Rhyolite
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Rhyolite, result 1 of 1

Item Details
Public
Available to everyone
Title
Rhyolite
Obsidian Vitrophyre
Date
unknown
Location
Elliston
Montana
United States of America
Material
silicic
felsic
Description
obsidian containing quartz, plagioclase feldspar, and alkali feldspar vitrophyres; highly vitrophyric; medium-grained vitrophyres; obsidian groundmass; hypohyaline
Repository
Taylor Science Center Rm. 1033
ID Number
BB
16
Source
Western Minerals, Inc.
Location1
Boulder Batholith in MT.
Thin Section?
Yes
Minerals
alkali feldspar
quartz
plagioclase feldspar
Textures
vitrophyric
medium-grained (1-5 mm)
Rock Color Index
mesocratic
Rock Type
volcanic
Location Description
Route 12, 0.5 miles west of Elliston, MT.
Reference(s)
Becraft et al. (1963); Ruppel (1963); Pardee and Schrader (1933); Robertson (1953); Robertson (1962)
Latitude
46.564309
Longitude
-112.444519
Rights
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License
Use of this image is in accordance with the applicable Terms & Conditions
File Properties
File Name
9013434.fpx
SSID
9013434

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