Twilight No. 1 (Twilight #1), Hoskinnini Mesa, Monument Valley Mining District, Navajo Co., Arizona, USAi
| Regional Level Types | |
|---|---|
| Twilight No. 1 (Twilight #1) | Prospect |
| Hoskinnini Mesa | Mesa |
| Monument Valley Mining District | Mining District |
| Navajo Co. | County |
| Arizona | State |
| USA | Country |
| Place | Population | Distance |
|---|---|---|
| Oljato-Monument Valley | 674 (2016) | 9.4km |
| Oljato-Monument Valley | 154 (2017) | 11.3km |
| Kayenta | 5,189 (2011) | 26.6km |
| Halchita | 266 (2011) | 41.9km |
| Navajo Mountain | 354 (2011) | 42.8km |
An U occurrence/prospect located in approximate sec. 17, T4lN, R19E, G&SRM, about 6.7 km (4.2 miles) ESE of Hoskinnini Mesa (coordinates of record) and 8.1 km (5.0 miles) N of Boot Mesa (coordinates of record), in Monument Valley. The geographic coordinates presented are for the center of sec. 17. This locality is not listed in the USGS MRDS database.
Mineralization is an U deposit hosted in a Shinarump Member of the Chinle Formation paleochannel. The ore body is uraninite in a continuous ore pod 25 feet x 175 feet.
Workings include exploratory drilling (1959).
Regions containing this locality
Select Mineral List Type
Standard Detailed Strunz Dana Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
1 valid mineral.
Detailed Mineral List:
| ⓘ Uraninite Formula: UO2 Reference: Scarborough, Robert B. (1981), Radioactive occurrences and uranium production in Arizona, Arizona Bureau of Geology and Mineral Technology Report for U.S. Department of Energy (Atomic Energy Commission), GJBX-143. RME-2071: 226. |
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Uraninite | 4.DL.05 | UO2 |
List of minerals arranged by Dana 8th Edition classification
| Group 5 - OXIDES CONTAINING URANIUM OR THORIUM | |||
|---|---|---|---|
| AXO2·xH2O | |||
| ⓘ | Uraninite | 5.1.1.1 | UO2 |
Regional Geology
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
| Holocene - Gelasian 0 - 2.588 Ma ID: 2779547 | Quaternary surficial deposits, undivided Age: Pleistocene (0 - 2.588 Ma) Description: Unconsolidated to strongly consolidated alluvial and eolian deposits. This unit includes: coarse, poorly sorted alluvial fan and terrace deposits on middle and upper piedmonts and along large drainages; sand, silt and clay on alluvial plains and playas; and wind-blown sand deposits. (0-2 Ma) Comments: Original map source: Arizona Geological Survey, DI-8 Geologic Map of Arizona, Digital Spatial data for the Geologic Map of Arizona, v. 3.0, edited by S.M. Richard and S.M. Kneale, 2002, 10 p., 2 DOS HD disks. Arc/INFO export file (.e00) format, scale 1:1,000,000. Lithology: Major:{sand,silt,clay} Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133] |
| Early Jurassic - Late Triassic 174.1 - 237 Ma ID: 3185972 | Mesozoic sedimentary rocks Age: Mesozoic (174.1 - 237 Ma) Lithology: Sandstone-conglomerate Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154] |
Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License
References
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