Topic
Gondwana
About: Gondwana is a research topic. Over the lifetime, 6078 publications have been published within this topic receiving 263050 citations. The topic is also known as: Gondwanaland.
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TL;DR: A small brachiopod fauna of early Permian age is recorded from pebbly mudstones and sandstones of the Phuket (Kaeng Krachan) Group at the Thai islands of Ko Muk, and Ko Phi Phi in the Andaman Sea, suggesting that the pebble mudstones are cool water deposits, contemporaneous with the late Asselian glacial deposits of Gondwana.
Abstract: A small brachiopod fauna of early Permian age is recorded from pebbly mudstones and sandstones of the Phuket (Kaeng Krachan) Group at the Thai islands of Ko Muk, and Ko Phi Phi in the Andaman Sea. Most species belong to genera found in temperate to high Permian palaeolatitudes, whereas other Permian faunas from Thailand are strong in tropical affinities, suggesting that the pebbly mudstones are cool water deposits, contemporaneous with the late Asselian glacial deposits of Gondwana. New taxa are Arctitreta percostata sp.nov., Komukia solita gen.nov., sp.nov. (Rugosochonetidae), Cancrinelloides monticulus sp.nov., Rhynchopora culta sp.nov., Arionthia sapa sp.nov. and Elasmata retusus gen.nov., sp.nov. (Heterelasminidae).
84 citations
TL;DR: In this paper, 30 apatite fission track ages and 22 track length measurements are presented from samples of basement rocks flanking the Malawi and Rukwa Rifts (East African Rift System) in order to elucidate the thermotectonic history of the rift flanks.
84 citations
TL;DR: In this paper, the authors studied detrital zircons from Early Carboniferous turbidites in synorogenic basins located on both sides of the Rheic suture in SW Iberia for provenance analysis.
84 citations
01 Jan 2008
TL;DR: The earliest glacial sequences may be Bashkirian in the subsurface of the Southern Carnarvon and Canning Basins, although definitive glacial characteristics are less well defined as mentioned in this paper.
Abstract: Widely distributed glacially derived material indicates that an extensive ice sheet covered Western Australia from at least the Gzhelian to mid-Sakmarian times. The earliest glacial sequences may be Bashkirian in the subsurface of the Southern Carnarvon and Canning Basins, although definitive glacial characteristics are less well defined. The younger glacially influenced successions are present in nearly all Phanerozoic basins in Western Australia, and typically comprise a lowermost glacial facies, middle marine mudstone facies, and uppermost fluvial-deltaic strata. Current palynological correlation show that the tripartite successions may not be coeval among all basins, which appears to contradict models of Gondwana-wide glaciation in which the end of glacial conditions is an inter-regional coeval event. However, detailed analysis is hampered by the existing low-resolution biostratigraphic scheme. There is some evidence that subsidence or penecontemporaneous faulting may have locally dominated relative sea-level change and modified regional glacial influences. A dramatic improvement in biostratigraphic resolution is required to resolve the controls on facies distribution, especially to differentiate between deglaciation patterns and periodic ice-sheet advance and retreat, and regional climatic changes and latitudinal differences within Gondwana.
84 citations
TL;DR: The most reliable results are obtained by combining analysis of faunal similarity (especially shelf faunas) with mapping the distribution of those biofacies which relate to former deep-water sites as mentioned in this paper.
84 citations