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La Angostura, Tafí del Valle Department, Tucumán, Argentina

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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:
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.

Mineral List

2 valid minerals.

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

Paleozoic - Neoproterozoic
252.17 - 1000 Ma

ID: 3189520
Precambrian-Phanerozoic sedimentary rocks

Age: Neoproterozoic to Permian (252.17 - 1000 Ma)

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. [154]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


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Rittler, Walter (1938).
Borello, A. (1956). "Recursos minerales de la República Argentina". Combustibles sólidos "Minerales". Instituto Nacional de Investigaciones de las Ciencias Naturales Museo Bernardino Rivadavia. Buenos Aires.
Peña, H. A. (1970). Minerales y rocas de aplicación de la Provincia de Tucumán. Secretaría de Estado de Comercio, Industria y Minería. Dirección Provincial de Minas. Tucumán.
Raúl J. Tauber Larry (1986). Visit to the zone.

Mineral and/or Locality  
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