La Angostura, Tafí del Valle Department, Tucumán, Argentina
|Latitude & Longitude (WGS84):||26° 55' 57'' South , 65° 40' 26'' West|
|Latitude & Longitude (decimal):||-26.93250,-65.67389|
|Köppen climate type:||Cwb : Subtropical highland climate or temperate oceanic climate with dry winters|
- Peat and bituminous coal deposit: sedimentary rocks of organic origin consisting predominantly of carbonised plant remains.
One kilometer to east of kilometer 50 Acheral road to Tafí del Valle, in a small Valley side of the left bank, it has retained about 75 meters above the river La Angostura, a remainder of deposit River of the flood, in the form of "silt", silty sand and peat banks interspersed therein up to 2 meters of thickness being this little extensive deposit, presenting plant fragments and crumbly surface. There are many plants fragments visible in peat, often including large roots and it is high in water, and breaks unevenly when dry and likes as soft rock.
This rock represents the initial stage in the modification of plant material to lignite and bituminous coal and the origin is continental. Forms from the deposition of plant debris on forest floors, in fens, or on moorland. By decay and reconstruction, the bottom layers of peat banks become compacted, darkened and hardened, while the carbon content increases.
Cinerite robes were found 300 meters to east of the route that goes from La Angostura towards the city of Tafí del Valle and 400 meters from the turn-off to El Mollar. The cinerite is presented in compact banks and is bluish gray color and coarse grain. Elevation: 1,916 m. asl.
2 valid minerals.
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
|Paleozoic - Neoproterozoic|
252.17 - 1000 Ma
|Precambrian-Phanerozoic sedimentary rocks|
Lithology: Sedimentary rocks
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.