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Mininco Formation

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Mininco Formation
Stratigraphic range: Pliocene
TypeGeological formation
UnderliesQuaternary sediments
OverliesHuelehueico Formation
Thicknessup to 300 m (980 ft)
Lithology
PrimaryConglomerate, and siltstone, sandstone, claystone
OtherTuff, coal
Location
RegionBío Bío Region, Araucanía Region
Country Chile
Type section
Named forMininco River

Mininco Formation (Spanish: Formación Mininco) is a geological formation composed of sediments that deposited during the Pliocene in central Chile. Near Angol the formation reaches thicknesses of up to 300 m. The upper strata of the formation contain tuff layers and coal beds that are rich in leaf fossils. Other fossils that have been found in the formation include fresh-water diatoms and bivalves.[1]

References

  1. ^ Elgueta, S.; Rubio, X. (1991). "Estratigrafía del Terciario del sector Occidental de la Depresión Central entre 37° y 38° S, Chile" (PDF). Actas. 6. Congreso Geológico Chileno (in Spanish). Santiago, Chile: Servicio Nacional de Geología y Minería. pp. 723–727.