Estratos de San Pedro

Estratos de San Pedro
Stratigraphic range: EoceneMiocene
UnderliesQuaternary sediments
OverliesTrafún Metamorphic Complex
Thicknessca. 1,000 m (3,300 ft)
Lithology
PrimaryConglomerate, sandstone, mudstone
OtherLignite
Location
RegionLos Ríos Region
CountryChile
Type section
Named forSan Pedro River
Named byJuan Brüggen

Estratos de San Pedro is the name given to the sedimentary strata of Paleogene age that crop out along San Pedro River, southern Chile. The strata were initially described by Juan Brüggen and later briefly investigated by Henning Illies who estimated their thickness at 1,000 metres (3,300 ft).[1] The strata are made up of conglomerate, sandstone and mudstone (Chilean Spanish: fangolita). The clasts of the conglomerates are made up of metamorphic rock and the disposition of the conglomerates varies from clast-supported to matrix-supported. The sandstone and mudstone contains layers of lignite coal that exceed 30 centimetres (12 in) in thickness.[1]

  1. ^ a b Elgueta, Sara; Le Roux, Jacobus; Duhart, Paul; McDonough, Michael; Urqueta, Esteban. Estratigrafía y sedimentología de la cuencas terciarias de la Región de Los Lagos (39-41°30'S (in Spanish). Santiago, Chile: Servicio Nacional de Geología y Minería. p. 14. ISSN 0020-3939.