Tecovas jasper, Briscoe County, Texas, USAi
| Regional Level Types | |
|---|---|
| Tecovas jasper | Outcrop |
| Briscoe County | County |
| Texas | State |
| USA | Country |
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Latitude & Longitude (WGS84):
34° 22' 10'' North , 101° 3' 29'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Quitaque area of Briscoe County. This material originates in the late Triassic Tecovas Formation (mapped as part of the Dockum Group). Tecovas jasper is widespread along the eastern Caprock Escarpment of the Llano Estacado and in the Canadian River valley west of Amarillo. Banks (1990) provides the best descriptions of the colors and most thorough discussions of Tecovas. He also provides a color plate of 11 Tecovas samples from three localities that include Weymonth Ranch (N = 4), Coetas Creek (N = 6), and West Amarillo Creek (N = 1). In general, Tecovas jasper is a fine-microcrystalline material similar to Alibates in texture and color. It is distinguishable by its often variegated or mottled appearance, with some exceptions. Most pieces are red, brown, cream, white, yellow, or green in colors. It is opaque, often with bluish white quartz vugs. It occurs in massive boulders as much as a meter in diameter that also contain tiny quartz-filled vugs. Both Alibates and Tecovas jasper come in red, but the latter has a more even red, and is generally mottled or variegated often with tiny quartz vugs.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
1 valid mineral.
Rock Types Recorded
Note: data is currently VERY limited. Please bear with us while we work towards adding this information!
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
| ⓘ 'Clay minerals' |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Quartz var. Agate Formula: SiO2 |
| ⓘ Quartz var. Agate-Jasper Formula: SiO2 |
| ⓘ Quartz var. Chalcedony Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Quartz var. Agate | 4.DA.05 | SiO2 |
| ⓘ | var. Agate-Jasper | 4.DA.05 | SiO2 |
| ⓘ | var. Chalcedony | 4.DA.05 | SiO2 |
| ⓘ | 4.DA.05 | SiO2 | |
| Unclassified | |||
| ⓘ | 'Clay minerals' | - | |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Quartz var. Agate | SiO2 |
| O | ⓘ Quartz var. Agate-Jasper | SiO2 |
| O | ⓘ Quartz var. Chalcedony | SiO2 |
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz var. Agate | SiO2 |
| Si | ⓘ Quartz var. Agate-Jasper | SiO2 |
| Si | ⓘ Quartz var. Chalcedony | SiO2 |
| Si | ⓘ Quartz | SiO2 |
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Mazatzal TerraneVolcanic Arc
- Palo Duro BasinBasin
- Shawnee DomainDomain
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