Results 81 to 90 of about 39,712 (281)
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
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Geochemistry of organic matter in carbonate Devonian sediments of the South Tatar arch
GeoresursyThe article deals with the lithology and geochemistry of organic matter of Upper Devonian-Lower Carboniferous deposits (Carbonate Devonian) of the eastern part of the South Tatar arch.
A. Yu. Orlova +5 more
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The Age, Stratigraphic Relationships, and Correlation of the Lower Part of the Olentangy Shale of Central Ohio [PDF]
, 1970 Author Institution: Department of Geology, Ohio Wesleyan University, Delaware, OhioThe Olentangy Shale of central Ohio (Delaware County) is made up of two distinct stratigraphic units separated by an unconformity.
Tillman, John R.
core
Synfolding and prefolding magnetizations in the Upper Devonian Catskill Formation of eastern Pennsylvania [PDF]
, 1986 The Upper Devonian Catskill Formation was sampled for paleomagnetic study in east-central Pennsylvania (41°N, 76°W). In one area the dominant component of magnetization (SE) is revealed over a broad spectrum of demagnetization temperatures ranging to at ...
Kent, Dennis V., Miller, John D.
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Geological Journal, Volume 61, Issue 5, Page 1291-1309, May 2026.The Pangkaimen Au–Ag deposits belong to the epithermal Au deposits, which are of great significance for guiding the research and development of this type of gold deposit. Metallogenic model diagram of Pangkaimen Au–Ag deposit. ABSTRACT The gold (Au) metallogenic belt in the northern Great Xing'an Range is characterised by the wide occurrence of the ...
Sheng Lu +8 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
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FRASNIAN AND VISEAN-NAMURIAN CONODONT FAUNAS AT PRAPROTNO, SLOVENIA
Rivista Italiana di Paleontologia e Stratigrafia, 2017 Conodont faunas from the limestone pebbles of the Upper Paleozoic Conglomerate at Praprotno, Slovenia demonstrate the presence of two faunas. The older fauna, marked by Palmatolepis surecta and Polygnathus decorosus is indicative of the Frasnian stage ...
TEA KOLAR-JURKOVSEK, BOGDAN JURKOVSEK
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A New Fern-like Plant Xinhangia spina Gen. et sp. Nov. from the Upper Devonian of China. [PDF]
Biology (Basel), 2022 Yang JN, Wang DM.
europepmc +1 more source
Limnology and Oceanography, Volume 71, Issue 5, May 2026.Abstract Enrichment patterns of the redox‐ and bio‐sensitive trace elements U, V, Cr, and Ni in margin sediments are essential for environmental reconstructions. However, their sedimentary accumulation pathways are not fully understood. While the accumulation of toxic trace elements like Cd, Hg, Pb, and Zn has been relatively well studied in fish ...
Frederik Gäng +4 more
wiley +1 more source
UPPER DEVONIAN ACRITARCHS AND MIOSPORES FROM THE GEIRUD FORMATION IN CENTRAL ALBORZ RANGE, NORTHERN IRAN [PDF]
Journal of Sciences, Islamic Republic of Iran, 1994 The Geirud Formation consists mainly of clastic sediments which are interbedded with limestone stringers. This rock unit is well-exposed along the Central Alborz Range in northern Iran.
doaj