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Altered river morphology in south africa related to the permian-triassic extinction | | P D Ward
; D R Montgomery
; R Smith
; | | Date: |
8 Sep 2000 | | Journal: | Science, 289 (5485), 1740-3 | | Abstract: | The Permian-Triassic transition in the Karoo Basin of South Africa was characterized by a rapid and apparently basin-wide change from meandering to braided river systems, as evidenced by preserved sedimentary facies. This radical changeover in river morphology is consistent with geomorphic consequences stemming from a rapid and major die-off of rooted plant life in the basin. Evidence from correlative nonmarine strata elsewhere in the world containing fluvial Permian-Triassic boundary sections suggests that a catastrophic terrestrial die-off of vegetation was a global event, producing a marked increase in sediment yield as well as contributing to the global delta(13)C excursion across the Permian-Triassic boundary. | | Source: | PubMed, pmid10976065 doi: 8792 | | Services: | Forum | Review | Favorites | |
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