Results 201 to 210 of about 32,377 (248)
How do the principal megabiases in the fossil record affect the discovery of past bryophyte diversity? [PDF]
Ann BotBlanco-Moreno C, Bippus AC, Tomescu AMF.
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Dynamic deep marine oxygenation during the Early and Middle Paleozoic. [PDF]
Sci AdvOstrander CM +6 more
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Parasitism as a Long-Lasting Interaction-First Evidence From Paleozoic Corals. [PDF]
Ecol EvolZapalski MK +3 more
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The rise of lichens during the colonization of terrestrial environments. [PDF]
Sci AdvBecker-Kerber B +31 more
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Geological Society, London, Memoirs, 1992
Abstract The Devonian System was the first pre-Quaternary system to have its base established at an internationally ratified Global Stratotype Section and Point (GSSP). The base of the System was defined at the base of the Monograptus uniformis Biozone at Klonk in Czechoslovakia (McLaren 1977). The upper boundary of the System is fixed by the
B. J. Bluck +2 more
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Abstract The Devonian System was the first pre-Quaternary system to have its base established at an internationally ratified Global Stratotype Section and Point (GSSP). The base of the System was defined at the base of the Monograptus uniformis Biozone at Klonk in Czechoslovakia (McLaren 1977). The upper boundary of the System is fixed by the
B. J. Bluck +2 more
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Geological Magazine, 1924
My attention has recently been called to some very interesting comments on the problem of the delimitation of the Silurian and Devonian systems, which were made by Dr. Elles in her Presidential address to Section C of the British Association at Liverpool.
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My attention has recently been called to some very interesting comments on the problem of the delimitation of the Silurian and Devonian systems, which were made by Dr. Elles in her Presidential address to Section C of the British Association at Liverpool.
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Nature, 2003
Perhaps the most enduring of puzzles in palaeontology has been the identity of Palaeospondylus gunni Traquair, a tiny (5-60-mm) vertebrate fossil from the Middle Devonian period (approximately 385 Myr ago) of Scotland, first discovered in 1890 (refs 1-3). It is known principally from a single site (Achanarras Quarry, Caithness) where, paradoxically, it
Keith S, Thomson +2 more
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Perhaps the most enduring of puzzles in palaeontology has been the identity of Palaeospondylus gunni Traquair, a tiny (5-60-mm) vertebrate fossil from the Middle Devonian period (approximately 385 Myr ago) of Scotland, first discovered in 1890 (refs 1-3). It is known principally from a single site (Achanarras Quarry, Caithness) where, paradoxically, it
Keith S, Thomson +2 more
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1978
Abstract Evaluation of time and correlation work within the Devonian suffer greatly from the lack of internationally agreed upon boundaries. The only boundary of the whole system which has been internationally agreed upon is its lower boundaryan excellent example of a precisely defined boundary based on biochronologic evidence.
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Abstract Evaluation of time and correlation work within the Devonian suffer greatly from the lack of internationally agreed upon boundaries. The only boundary of the whole system which has been internationally agreed upon is its lower boundaryan excellent example of a precisely defined boundary based on biochronologic evidence.
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A Devonian Trilobite with an Eyeshade
Science, 2003Trilobites include the oldest species with preserved eyes for which detailed optical mechanisms have been suggested. They appear in the Cambrian, and in comparison to other species present then, trilobites already had unusually sophisticated eyes with lenses made out of the mineral calcite ( [1 ...
Richard, Fortey, Brian, Chatterton
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