Franklin; Aston & Fair C-1 NMA well, Sun Valley, Petrified Forest Mining District, Navajo Co., Arizona, USAi
|Regional Level Types|
|Franklin; Aston & Fair C-1 NMA well||Well|
|Petrified Forest Mining District||- not defined -|
A former He occurrence/well located in the SW¼NE¼ sec. 27, T18N, R23E, G&SRM, 16.6 km (10.3 miles) ESE of Sun Valley (town) and 7.5 km (4.7 miles) SW of Adamana (town) (Apache County), on National Park land. The USGS MRDS database stated accuracy for this locality is 100 meters.
NOTE: The USGS MRDS database includes 2 files with the exact same title "Franklin; Aston & Fair C-1 NMA well." Research into the source reference (Peirce, et al, 1970) revealed that only the MRDS file cited herein applies to this locality. The other file applies to another locality (Franklin-Aston-Fair A-1 NMA well).
Mineralization is an He deposit hosted in the Shinarump horizon. Local rocks include rocks of the Chinle Formation.
Regions containing this locality
|North America Plate||Tectonic Plate|
|Colorado Plateau, USA||Plateau|
Select Mineral List TypeStandard Detailed Strunz Dana Chemical Elements
Commodity ListThis is a list of exploitable or exploited mineral commodities recorded at this locality.
Detailed Mineral List:
| ⓘ 'Helium'|
Reference: Peirce, H.W., S.B. Keith and J. C. Wilt (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182:183.
List of minerals arranged by Strunz 10th Edition classification
|Unclassified Minerals, Rocks, etc.|
List of minerals arranged by Dana 8th Edition classification
|Unclassified Minerals, Mixtures, etc.|
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
|Early Jurassic - Late Triassic|
174.1 - 237 Ma
|Mesozoic sedimentary rocks|
Age: Mesozoic (174.1 - 237 Ma)
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. 
|Norian - Carnian|
208.5 - 237 Ma
Age: Late Triassic (208.5 - 237 Ma)
Stratigraphic Name: Chinle Formation
Description: Colorful mudstone, such as in the Painted Desert, and less abundant lenses of sandstone and conglomerate, deposited by a large river system. This unit typically is eroded into badlands topography and contains clays that are prone to shrinking and swelling. (210-230 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.
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.