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Distinct causes underlie double-peaked trilobite morphological disparity in cephalic shape. [PDF]
Commun BiolDrage HB, Pates S.
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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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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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Thermophysical Properties Of Devonian Shales
SPE Annual Technical Conference and Exhibition, 1979Abstract A detailed study of the thermophysical properties of Devonian shales from the central and eastern United States has been carried out. The properties encompass a wide spectrum of material properties such as thermal conductivity, thermal diffusivity, specific heat, dielectric constant and sonic velocities ...
Krishnan Rajeshwar, Joel DuBow
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1993
AbstractThe region described in this subchapter lies between the craton and the western edge of the carbonate platform built upon the Devonian continental shelf within one or two hundred kilometres of the continental margin. Sediments deposited west of the platform edge are described in the companion volume, “Geology of the Cordilleran Orogen in Canada”
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AbstractThe region described in this subchapter lies between the craton and the western edge of the carbonate platform built upon the Devonian continental shelf within one or two hundred kilometres of the continental margin. Sediments deposited west of the platform edge are described in the companion volume, “Geology of the Cordilleran Orogen in Canada”
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1994
Abstract The Devonian succeeded the Caledonian orogeny, which had resulted in great changes in plate framework and tectonogeography in the world. Smith eta!. (1981), Ziegler (1981), and Scotese and McKerrow (1990) have attempted to reconstruct the Devonian palaeocontinents.
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Abstract The Devonian succeeded the Caledonian orogeny, which had resulted in great changes in plate framework and tectonogeography in the world. Smith eta!. (1981), Ziegler (1981), and Scotese and McKerrow (1990) have attempted to reconstruct the Devonian palaeocontinents.
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