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Ohio Mine, "Amphitheater" glacial cirque, Ouray, Ouray Mining District, Ouray Co., Colorado, USAi
Regional Level Types
Ohio MineMine
"Amphitheater" glacial cirque- not defined -
Ouray- not defined -
Ouray Mining DistrictMining District
Ouray Co.County

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Latitude & Longitude (WGS84):
38° 1' North , 107° 39' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
Ouray1,008 (2017)2.0km
Portland135 (2011)8.5km
Telluride2,399 (2018)16.7km
Ridgway977 (2017)18.0km
Mountain Village1,395 (2017)20.4km

A former mine located 0.5 km (0.3 mile) S of the Amphitheater (coordinates of record) and 1.9 km (1.2 miles) ESE of Ouray. Started in the 1920's.

Mineralization is hosted in the Leadville Limestone.

Workings include underground openings comprised of a 75 foot (23 meter) tunnel at the base of the cliffs.

Select Mineral List Type

Standard Detailed Gallery Strunz Dana Chemical Elements

Mineral List

3 valid minerals.

Detailed Mineral List:

Formula: CaCO3
Reference: Rocks & Min.: 64:210.
Formula: FeS2
Reference: Rocks & Min.: 64:210.
Formula: SiO2
Reference: Rocks & Min.: 64:210.; 2008 New Mexico Mineral Symposium abstracts
Quartz var. Milky Quartz
Formula: SiO2
Habit: Unknown
Reference: Eckel, E.B. (1997), Minerals of Colorado.


List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Group 4 - Oxides and Hydroxides
var. Milky Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Unclassified Minerals, Mixtures, etc.
var. Milky Quartz-SiO2

List of minerals for each chemical element

C CalciteCaCO3
O Quartz var. Milky QuartzSiO2
O QuartzSiO2
O CalciteCaCO3
Si Quartz var. Milky QuartzSiO2
Si QuartzSiO2
S PyriteFeS2
Ca CalciteCaCO3
Fe PyriteFeS2


Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Rocks & Minerals (1989): 64: 210.

Other Regions, Features and Areas containing this locality

North America
North America PlateTectonic Plate

This page contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
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