Tract No. 1, Sun Valley, Petrified Forest Mining District, Navajo County, Arizona, USAi
| Regional Level Types | |
|---|---|
| Tract No. 1 | - not defined - |
| Sun Valley | Town |
| Petrified Forest Mining District | - not defined - |
| Navajo County | County |
| Arizona | State |
| USA | Country |
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Latitude & Longitude (WGS84):
34° 53' 55'' North , 109° 51' 9'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Sun Valley | 316 (2011) | 20.8km |
| Woodruff | 191 (2011) | 21.7km |
| Holbrook | 5,019 (2017) | 27.9km |
| Joseph City | 1,386 (2011) | 44.3km |
| Snowflake | 5,666 (2017) | 47.5km |
A tract of 21 acres and a uranium prospect located in the SE¼ sec. 1, T17N, R23E, G&SRM, 20.8 km (12.9 miles) ESE of Sun Valley and 9.1 km (5.7 miles) SSW of Adamana, on private land, outside the national park boundaries and extending along its western boundary. Owned by the New Mexico and Arizona Land Co. (1951), and leased to Frank A. Do Bell of Holbrook. The USGS MRDS database stated accuracy for this locality is 500 meters.
Uranium-bearing rock forms a lens about 125 feet long, exposed on both sides of a sharp ridge. It has a maximum thickness of about 8 feet but thins rapidly to less than 2 feet. It is a flat-lying, buff-colored sandstone, clay, and conglomerate of the Chinle Formation of late Triassic age which contain abundant carbonized and petrified fossil plant debris. The petrified material, which is commonly in the form of buff-colored tree limbs and trunks, is non-radioactive. All the radioactivity comes from the carbonized material. This consists mainly of fragments or small flattened lenticular masses, but some of the petrified tree limbs have an outer shell of radioactive carbonized wood, as though the limbs had been charred before burial in sediment. Perhaps the fragments of carbonized material represent charred twigs and bits of charcoal broken from the surfaces of burnt logs and limbs during deposition.
Two channel samples contained 0.008 and 0.017 percent U, and individual fragments of carbonized material are much richer. In general, the radioactivity is roughly proportional to the amount of carbonized material. No uranium minerals were recognized.
Two channel samples contained 0.008 and 0.017 percent U, and individual fragments of carbonized material are much richer. In general, the radioactivity is roughly proportional to the amount of carbonized material. No uranium minerals were recognized.
Local rocks include rocks of the Chinle Formation.
Commodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Rock Types Recorded
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Alphabetical List Tree DiagramList of minerals for each chemical element
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Baca BasinBasin
- Colorado PlateauShield
- Great Plains DomainDomain
USA
- Arizona
- Supai Salt BasinBasin
- Colorado PlateauPlateau
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