Results 321 to 330 of about 69,223 (345)
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Geological Society, London, Special Publications, 1964
Summary It is estimated that the duration of Carboniferous time was 65 m.y., extending from 345 to 280 m.y. ago. Using age-determinations made on sediments, contemporaneous volcanic rocks, and intrusive rocks that have varying degrees ofstratigraphical control, a provisional Carboniferous time-scale is proposed.
Edward Howel Francis +1 more
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Summary It is estimated that the duration of Carboniferous time was 65 m.y., extending from 345 to 280 m.y. ago. Using age-determinations made on sediments, contemporaneous volcanic rocks, and intrusive rocks that have varying degrees ofstratigraphical control, a provisional Carboniferous time-scale is proposed.
Edward Howel Francis +1 more
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Nature, 1973
AN expedition to search for insects in the Upper Carboniferous freshwater shales of the Hellyer Gorge area of north-western Tasmania in December 1972 was successful. The single specimen obtained is a whole insect (Fig. 1) with wing span of 50 mm, preserving all details of both a fore and a hind wing and some details of the body.
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AN expedition to search for insects in the Upper Carboniferous freshwater shales of the Hellyer Gorge area of north-western Tasmania in December 1972 was successful. The single specimen obtained is a whole insect (Fig. 1) with wing span of 50 mm, preserving all details of both a fore and a hind wing and some details of the body.
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2020
The Carboniferous Period experienced recovery and major diversification in the marine and terrestrial realms after the end-Devonian mass extinctions. Marked evolutions took place in the terrestrial realm with the development of extended forests and the appearance of reptiles and the first flying organisms.
Aretz, Markus +5 more
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The Carboniferous Period experienced recovery and major diversification in the marine and terrestrial realms after the end-Devonian mass extinctions. Marked evolutions took place in the terrestrial realm with the development of extended forests and the appearance of reptiles and the first flying organisms.
Aretz, Markus +5 more
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Carboniferous isotope stratigraphy
Geological Society, London, Special Publications, 2021Abstract We present an updated set of Carboniferous Sr, C and O isotope stratigraphies based on the existing literature, given the importance of chemostratigraphy for stratigraphic correlation in the Carboniferous. The Carboniferous 87 Sr/ 86 Sr record, constructed using brachiopods
Jitao Chen, Bo Chen, Isabel P. Montañez
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Bathymetry on a Carboniferous reef [PDF]
Lethaia, 1973 Broadhurst, F. M. & Simpson, I. M.: Bathymetry on a Carboniferous reef. In the Lower Carboniferous deposits of Castleton, Derbyshire, well bedded shelf limestones, apparently of shallow water origin, pass northwards into a marginal tract of poorly bedded apron-reef limestones which dip at about 30° downwards and away from the ‘shelf’.
Frederick M. Broadhurst +1 more
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The diversity of the Carboniferous phytoplankton
Review of Palaeobotany and Palynology, 2008Here were present a synthesis of the published literature on in situ Carboniferous acritarchs, prasinophyte algae and associated microfossils. The Early Carboniferous had a rich acritarch fossil record, with assemblages documented in both equatorial and high latitude regions.
Mullins, G.L., Servais, Thomas
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The biostratigraphy of Carboniferous chondrichthyans
Geological Society, London, Special Publications, 2021Abstract Among several groups of fishes existing in the Carboniferous, the Chondrichthyes appear to have the greatest stratigraphic potential. However, despite the long history of investigation into Paleozoic sharks, and especially their teeth, our knowledge of their usefulness in biostratigraphy and palaeoecology is still at an ...
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Carboniferous lepidodendraceae and lepidocarpaceae [PDF]
The Botanical Review, 1978 The Carboniferous arborescent lycopods were the largest and most specialized members of this group, having developed from the simpler Devonian forms described asLepidodendropsis. The changes of external morphology and internal anatomy show that the plants belonging to the Lepidodendraceae had determinate growth patterns.
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American Carboniferous Dipnoans
The Journal of Geology, 1934New Carboniferous lungfish material is described and Figured, including Prosageno-dus? castrensis sp. nov., founded on a tooth plate from the Chester; a skull roof from the Pennsylvanian of Illinois assigned to S. serratus; a tooth from the same period and region described as Proceratodus carlinvillensis, gen. et sp. nov.; and S. ciscoenis sp.
Homer J. Smith, Alfred Sherwood Romer
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2006
Carboniferous deposits outcrop at several localities in different parts of Croatia (Medvednica Mt., Slavonian Mts., Banovina-Kordun region, Gorski Kotar region, Velebit Mt.), or have been found as pebbles in younger sediments (Gorski Kotar, Hrvatsko Zagorje)
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Carboniferous deposits outcrop at several localities in different parts of Croatia (Medvednica Mt., Slavonian Mts., Banovina-Kordun region, Gorski Kotar region, Velebit Mt.), or have been found as pebbles in younger sediments (Gorski Kotar, Hrvatsko Zagorje)
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