Dolomite pipes in the Crato Formation fossil lagerstätte (Lower Cretaceous, Aptian), of northeastern Brazil

David Martill, Bob Loveridge, U. Heimhofer

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Pipe-like structures filled with massive and brecciated Fe-rich dolomites occur within a 5–6 m sequence of otherwise horizontal, millimetre-laminated limestones of the Nova Olinda Member of the Crato Formation (Aptian, Lower Cretaceous) of north east Brazil. The pipe-fills predate compaction, contain hydro-brecciated host strata, developed penecontemporaneously with a carbonate laminite, and may represent methane seeps. Such seeps may have developed above buried topographic highs as fluids emanating from deeper strata migrated along buried discontinuities such as the basement/Cretaceous unconformity and buried faults in the basement.
    Original languageEnglish
    Pages (from-to)78-86
    Number of pages9
    JournalCretaceous Research
    Volume29
    Issue number1
    DOIs
    Publication statusPublished - Feb 2008

    Fingerprint

    Dive into the research topics of 'Dolomite pipes in the Crato Formation fossil lagerstätte (Lower Cretaceous, Aptian), of northeastern Brazil'. Together they form a unique fingerprint.

    Cite this