Evidence for 2.0 Ga continental microbial mats in a paleodesert setting
作者： Edward L Simpson , Elizabeth Heness , Adam Bumby , Patrick G Eriksson , Kenneth A Eriksson
DOI: 10.1016/J.PRECAMRES.2013.08.001
关键词: Geology 、 Precambrian 、 Sediment 、 Microbial mat 、 Sedimentary depositional environment 、 Arid 、 Earth science 、 Paleontology 、 Great Oxygenation Event
摘要: Abstract Early evolved microbial communities characterized the initial biological invasion of Precambrian continental landscapes. In modern arid settings, mats and soil crusts are well-developed stabilize sediment. The Paleoproterozoic Makgabeng Formation in South Africa is one oldest best preserved, dryland systems on Earth. Six types mat-related structures now recognized within these depositional systems. This paper presents three newly discovered that include tufted mat, crusts, gas-escape features, addition to previously documented roll up sand cracks, wrinkled features. These discoveries demonstrate were well-established inhabited diverse settings by 2.0 Ga, approximately 200 million years after onset Great Oxidation Event.
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