Results 31 to 40 of about 94,162 (350)

Evolution of leaf-form in land plants linked to atmospheric CO2 decline in the Late Palaeozoic era [PDF]

, 2001
The widespread appearance of megaphyll leaves, with their branched veins and planate form, did not occur until the close of the Devonian period at about 360 Myr ago.
AH Knoll, C. P. Osborne, CI Mora, D Edwards, D Edwards, D. J. Beerling, DJ Beerling, DJ Beerling, DJ Beerling, DJ Beerling, FI Woodward, G Bowes, GD Farquhar, GD Farquhar, JC McElwain, KJ Niklas, LA Martinelli, P Kenrick, PG Gensel, PG Gensel, PJ Schulte, PJ Valdes, PS Nobel, RA Berner, RA Berner, S Von Caemmerer, SG Hao, TJ Algeo, W Larcher, W Zimmermann, W. G. Chaloner, WG Chaloner, WG Chaloner   +32 more
core   +1 more source

Anatomy and evolution of the first Coleoidea in the Carboniferous

Communications Biology, 2019
Coleoidea (squids and octopuses) comprise all crown group cephalopods except the Nautilida. Coleoids are characterized by internal shell (endocochleate), ink sac and arm hooks, while nautilids lack an ink sac, arm hooks, suckers, and have an external ...
C. Klug, N. Landman, D. Fuchs, R. Mapes, Alexander Pohle, P. Guériau, S. Reguer, R. Hoffmann   +7 more
semanticscholar   +1 more source

Gold in Devono-Carboniferous red beds of northern Britain [PDF]

, 2015
We are grateful to D. Craw and an anonymous reviewer for comments that helped to clarify the paper.
Bellis, David, Parnell, John, Spinks, Samuel, Still, John   +3 more
core   +1 more source

Sedimentation conditions and clast transport during the formation of sedimentary paleobasins in the north of Irkutsk Oblast and river network formation

Известия высших учебных заведений: Геология и разведка, 2023
Background. Changes in the composition of clastic material reflect changes in both the paleogeographic environment and clast transport paths. In turn, this indicates changes in the conditions of regional development.
N. A. Orlova, M. V. Orlov
doaj   +1 more source

An effective palynological preparation procedure using hydrogen peroxide [PDF]

, 2007
Most pre-Quaternary palynology samples are currently prepared by demineralization of the sediment/sedimentary rock matrix using hydrochloric and hydrofluoric acids (HCl and HF respectively).
Kyffin-Hughes, Jane E., Owens, Bernard, Riding, James   +2 more
core   +2 more sources

Timing of the magmatism of the paleo-Pacific border of Gondwana: U-Pb geochronology of Late Paleozoic to Early Mesozoic igneous rocks of the north Chilean Andes between 20° and 31°S [PDF]

, 2014
Indexación: Web of Science; ScieloABSTRACT. U-Pb zircon geochronological data provide record of about 130 Ma of igneous activity in the Andes of northern Chile, which extended episodically from the latest Early Carboniferous to Early Jurassic (328-194 Ma)
Maksaev, Víctor, Munizaga, Francisco, Tassinari, Colombo   +2 more
core   +1 more source

A Description of the New Hybodont Shark Genus, Columnaodus, from the Burlington and Keokuk Limestones (Carboniferous, Mississippian, Osagean) of Illinois and Iowa, USA

Diversity
Bonebeds occurring in exposures of the Burlington and Keokuk Limestones (Mississippian/Osagean) along the Iowa and Illinois border (USA) contain an abundant and diverse collection of chondrichthyan remains that includes teeth, spines, denticles, and ...
David Cicimurri, Charles Ciampaglio, Matthew Hoenig, Ryan Shell, Lauren Fuelling, David Peterman, Daniel A. Cline, Stephen Jacquemin   +7 more
doaj   +1 more source

Stratigraphic-Tectonic Evolution and Characterization of the Carboniferous in the Karamay–Baikouquan Fault Zone in the Northwestern Margin of the Junggar Basin, Northwest China

Frontiers in Earth Science, 2022
The northwestern margin of the Junggar Basin has a complex tectonic history, which is challenging for hydrocarbon exploration. This study highlights the structural patterns, tectonic evolution, and controlling factors of the Karamay–Baikouquan Fault Zone
Yinshan Ma, Yinshan Ma, Tao Wang, Yazhou Yang, Yazhou Yang, Zhiwei Liu, Lei Zhang, Yu Bai   +7 more
doaj   +1 more source

Internal framework and geochemistry of the Carboniferous Huaco granite pluton, Sierra de Velasco, NW Argentina [PDF]

, 2018
The A-type Huaco granite pluton of the Velasco range (Sierras Pampeanas of northwest Argentina) is formed by three coeval granitic facies and contains subordinate coeval-to-late facies, as well as enclaves, dikes and stocks that show different temporal ...
Grosse, Pablo, Lozano Fernández, Rafael Pablo, Murata, Mamoru, Sardi, Fernando Guillermo   +3 more
core   +2 more sources

Diversity change during the rise of tetrapods and the impact of the ‘Carboniferous rainforest collapse’

Proceedings of the Royal Society B: Biological Sciences, 2018
The Carboniferous and early Permian were critical intervals in the diversification of early four-limbed vertebrates (tetrapods), yet the major patterns of diversity and biogeography during this time remain unresolved.
E. Dunne, R. Close, David J. Button, N. Brocklehurst, Daniel D. Cashmore, Graeme T. Lloyd, R. Butler   +6 more
semanticscholar   +1 more source