Underlies Quaternary sediments Other Lignite Named by Juan Brüggen Named for San Pedro River | Thickness ca. 1000 m Country Chile Region Los Ríos Region | |
Overlies Trafún Metamorphic Complex Primary Conglomerate, Sandstone, Mudstone | ||
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 m. The strata are made up of conglomerate, sandstone and mudstone (Chilean Spanish: fangolita). The clast 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 do exceed 30 cm in thickness.
References
Estratos de San Pedro Wikipedia(Text) CC BY-SA