Results 31 to 40 of about 325 (174)
A new elasmobranch Karksiodus mirus gen. et sp. nov. from the Burtnieki Regional Stage, Middle Devonian of Estonia [PDF]
Estonian Journal of Earth Sciences, 2011 Teeth of a new elasmobranch Karksiodus mirus gen. et sp. nov. were discovered on two levels in the sandstones of the Karksi outcrop (South Estonia), corresponding to the Härma Beds, lower part of the Burtnieki Regional Stage (Givetian, Middle Devonian ...
Alexander Ivanov +2 more
doaj +1 more source
Chondrichthyan microremains from the Givetian of the Aragonian Pyrenees (Spain)
Bulletin de la Société Géologique de France, 2007 Abstract A Lower and basal Middle varcus Zone (Givetian, Middle Devonian) vertebrate association consisting of chondrichtyan teeth and scales of the genus Phoebodus is documented for the first time from the Aragonian Pyrenees of Spain. This record suggests that different teeth morphologies that were previously treated as separate taxa ...
Liao Chen, Jau-Chyn +2 more
openaire +2 more sources
Late Givetian ammonoids from Hassi Nebech (Tafilalt Basin, Anti-Atlas, southern Morocco) [PDF]
Fossil Record, 2013 The Hassi Nebech area of the SE Tafilalt (Tafilalt Basin, Anti-Atlas, Morocco) yielded the richest and most diverse late Givetian ammonoid fauna on a global scale.
J. Bockwinkel +2 more
doaj +5 more sources
Givetian/Frasnian (Middle/Upper Devonian) transition in the eastern Taurides, Turkey
TURKISH JOURNAL OF EARTH SCIENCES, 2019 Devonian strata, including siliciclastic and carbonate rocks that were deposited in shallow marine to coastal environments, are widely distributed in the eastern Taurides of southern Turkey. To document the regional formation of the Givetian (Middle Devonian)/ Frasnian (Upper Devonian) boundary, a section in the eastern Taurides was studied in high ...
Recep ÖZKAN +11 more
openaire +4 more sources
Givetian-Frasnian phytogeography of Euramerica and western Gondwana based on miospore distribution [PDF]
Geological Society, London, Memoirs, 1990 Abstract The Givetian and Frasnian miospore distributions in western Gondwana and southern Euramerica show a rather uniform vegetation prevailing from palaeo-polar to palaeo-tropical regions. Similar climatic conditions are certainly required to explain this but it is concluded from a discussion on the dispersal of homosporous vegetation that
Streel, Maurice +2 more
openaire +2 more sources
Известия высших учебных заведений: Геология и разведка, 2019 Three stages, namely Middle Devonian (I), Early Late Devonian (II) and Late Late Devonian (III), are distin-guished in the evolution of antiarchs (Placodermi, Antiarchi) in the Middle-Late Devonian of Northern Eurasia.
S. V. Moloshnikov
doaj +1 more source
DEVONIAN-CARBONIFEROUS MAGMATISM AND METALLOGENY IN THE SOUTH URAL ACCRETIONARY-COLLISIONAL SYSTEM
Геодинамика и тектонофизика, 2021 The oceanic stage in the history of the South Urals completed in the Ordovician – Early Silurian. The Ordovician through Devonian events in the region included the formation of an island arc in the East Ural zone from the Middle Ordovician to Silurian ...
A. M. Kosarev +9 more
doaj +1 more source
Early evolutionary history of the seed
Biological Reviews, Volume 101, Issue 3, Page 1511-1553, June 2026.ABSTRACT The seed is an essential stage in the life history of gymnospermous and angiospermous plants, facilitating both their survival and dispersal. We reappraise knowledge of the evolutionary history of the gymnospermous seed, from its origin in the late Devonian through to the well‐known end‐Permian extinctions – an interval encompassing the ...
Richard M. Bateman +2 more
wiley +1 more source
Middle Devonian and Frasnian bryozoan fauna from the Holy Cross Mountains, Poland
Acta Palaeontologica PolonicaThe present paper describes a bryozoan fauna from the Devonian of Holy Cross Mountains (Poland) which includes nine species. Six species were described from the Dobruchna Member of the Skały Formation (Eifelian) of Skały section: Cyclotrypa sp ...
Andrej Ernst +2 more
doaj +1 more source
Geologia USP. Série Científica, 2018 The Devonian brachiopods from Goiás (Alto Garças Sub-basin, Paraná Basin) present records in the cities of Caiapônia, Amorinópolis, and Doverlândia.
Fábio Augusto Carbonaro +3 more
doaj +1 more source