Results 121 to 130 of about 292 (159)
Controlling factors of low resistivity in deep shale and their implications on adsorbed gas content: a case study in the luzhou area. [PDF]
Liang M, Fu G, Yu Y, Yuan H.
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Marine microfossils: Tiny archives of ocean changes through deep time. [PDF]
Sremac J +4 more
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The Cabrières Biota (France) provides insights into Ordovician polar ecosystems. [PDF]
Saleh F +20 more
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Influence of quartz types on mechanical parameters in the early silurian Longmaxi shale, Sichuan Basin. [PDF]
Zhang Q +9 more
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The rise of lichens during the colonization of terrestrial environments. [PDF]
Becker-Kerber B +31 more
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Age-dependent extinction and the neutral theory of biodiversity. [PDF]
Saulsbury JG +4 more
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Graptolite ontogeny and the size of the graptolite zooid
Geological Magazine, 1995AbstractTwo methods of estimating the size of the graptolite zooid are described and discussed. It is possible to size a zooid by reference to cortical bandages or with reference to modem Rhabdopleura and its tubes. These two methods give very different results, with the first suggesting small zooids relative to thecal size and the second suggesting ...
Susan Rigby, Margaret Sudbury
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Geological Society, London, Special Publications, 1979
Summary Graptoloids became extinct in latest Early Devonian (Pragian) times, and dendroids in the late Carboniferous. There is insufficient information for the other six graptolite orders to suggest when they might have become extinct, so that in these cases it is impossible as yet to speculate how extinction occurred.
T. N. Koren’, R. B. Rickards
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Summary Graptoloids became extinct in latest Early Devonian (Pragian) times, and dendroids in the late Carboniferous. There is insufficient information for the other six graptolite orders to suggest when they might have become extinct, so that in these cases it is impossible as yet to speculate how extinction occurred.
T. N. Koren’, R. B. Rickards
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Are the Graptolites Bryozoans?
Geological Society of America Bulletin, 1931Introduction The authors, while enjoying the ease of a steamer chair on a joint trip to Europe in 1922, and discussing somewhat idly at first the taxonomic position of the graptolites, discovered to their mutual great satisfaction that they had arrived independently at the conviction that the graptolites are an early and long extinct branch of the ...
E. O. ULRICH, R. RUEDEMANN
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