Tuffs above us: how tiny we are
The western escarpment of the Andes in northern Chile reflect the dynamic evolution of the landscape for the last 20 million years. Large volume ignimbrite sheets covered extended areas during the Early Miocene followed by uplift and incision as a result of increased fluvial runoff at the onset of glaciation. This several hundred metres deep valleys expose successive ignimbrite sheets formed by a major ignimbrite flare-up event of the Central Andes. Pumiceous pyroclastic flow deposits run several tens of kilometres westward and reached even the Pacific ocean. This landscape finely represent the dynamic evolution of the landscape, where we can feel how tiny we are on the Earth...
Taken on 29
September
2019
Submitted on Feb. 15, 2020
Categories
- Climate: Past, Present & Future (679)
- Field (2761)
- Geochemistry, Mineralogy, Petrology & Volcanology (860)
- Geodynamics (360)
- Geomorphology (1290)
- Stratigraphy, Sedimentology and Palaeontology (490)
- Tectonics and Structural Geology (549)
Location
- South America (306)
- Chile (74)
- Exact location (-70.0201 W, -18.4078 S)
Tags
erosion, valley, geodynamics, tectonics, pyroclastic flow
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Licence
Credit: Szabolcs Harangi (distributed via imaggeo.egu.eu)
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