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Arcabuco Formation
Geological formation in the Colombian Andes / From Wikipedia, the free encyclopedia
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The Arcabuco Formation (Spanish: Formación Arcabuco, Jar, JKa) is a geological formation of the Altiplano Cundiboyacense, Eastern Ranges of the Colombian Andes. The formation consists of thick beds of light-coloured quartzitic sandstones and conglomerates with occasional shales and dates to the Late Jurassic and Early Cretaceous periods; Tithonian to Berriasian epochs. Dinosaur footprints have been found in the Arcabuco Formation near the Iguaque anticlinal outside Chíquiza, Boyacá.
Quick Facts Type, Underlies ...
Arcabuco Formation | |
---|---|
Stratigraphic range: Tithonian-Berriasian ~145–142 Ma | |
![]() Arcabuco Formation at the Sáchica rock shelter | |
Type | Geological formation |
Underlies | Rosablanca Fm., Cumbre Fm. |
Overlies | Girón Formation |
Thickness | 500–800 m (1,600–2,600 ft) |
Lithology | |
Primary | Sandstone |
Other | Shale |
Location | |
Coordinates | 5°38′11″N 73°30′41″W |
Region | Altiplano Cundiboyacense Eastern Ranges, Andes |
Country | ![]() |
Type section | |
Named for | Arcabuco |
Named by | Scheibe |
Location | Arcabuco (original) Villa de Leyva (redefined) |
Year defined | 1938, 1985 |
Coordinates | 5°38′11″N 73°30′41″W |
Region | Boyacá |
Country | ![]() |
![]() Paleogeography of Northern South America 150 Ma, by Ron Blakey |
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