The Lower Cretaceous Apeleg Formation of the Aisen Basin, southern Chile. Tidal sandbar deposits of an epicontinental sea

C. Mike Bell, Manuel Suárez

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

The Apeleg Formation is a Lower Cretaceous marine succession of the Aisen Basin of southern Chile. Clastic sediments were deposited in a shallow epicontinental sea in a north-south elongated retroarc basin. This sedimentary basin developed as a thermal sag to the east of a subduction-related magmatic arc on the South American continental margin. A sequence of up to 1200 m of well-sorted sandstones and mudstones are characterised by mud-draped ripples and a well-preserved and varied trace fossil assemblage. The sediments were deposited as offshore tidal sandbars or sand ridges on a shallow marine shelf.

Original languageEnglish
Pages (from-to)203-225
Number of pages23
JournalRevista Geologica de Chile
Volume24
Issue number2
Publication statusPublished - 1 Dec 1997

ASJC Scopus subject areas

  • Geology

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