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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Asia
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Far East
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China
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Xinjiang China
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Junggar Basin (1)
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Great Lakes
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Primary terms
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carbon
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geomorphology (2)
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Invertebrata
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isotopes
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stable isotopes
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Mesozoic
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Jurassic
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Xishanyao Formation (1)
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meteorites (1)
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North America
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Great Lakes
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Great Lakes region (4)
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United States
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Outagamie County Wisconsin (1)
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Winnebago County Wisconsin (1)
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sedimentary structures
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planar bedding structures
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sediments
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clastic sediments
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till (6)
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peat (1)
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Environmental conditions and mechanisms restricting microbial methanogenesis in the Miquan region of the southern Junggar Basin, NW China
Folding double-width pontoon boat for vibracoring and other aquatic sampling
Lake Michigan water levels and the development of Holocene beach-ridge complexes at Two Rivers, Wisconsin: Stratigraphic, geomorphic, and radiocarbon evidence
Environmental analysis of a Twocreekan-aged beetle (Coleoptera) assemblage from Kewaunee, Wisconsin
A Twocreekan organic horizon, which is underlain by till of the Haven Member and overlain by till of the Two Rivers Member of the Kewaunee Formation, was investigated near Kewaunee, Wisconsin. Wood from this horizon was dated at 11,700 ± 110 B.P. (ISGS-1061) and 11,650 ± 170 B.P. (ISGS-1234). The insect fauna from the Kewaunee site has many elements in common with the insects from the type section of the Two Creeks Forest Bed, 14 km to the south. These include the northwestern carabid Asaphidion yukonense , northern carabids Carabus taedatus and Bembidion grapii , and the northern staphylinid Acidota quad rata . In contrast, the Kewaunee site fauna appears to have inhabited a somewhat colder environment, as suggested by the occurrence of the carabids Cymindis unicolor and Pterostichus (Cryobius) spp. We interpret the Kewaunee specimens of aquatic, water-marginal, and upland species to represent an allochthonous rather than an autochthonous assemblage.