Results 31 to 40 of about 3,963,579 (218)

The lower actinopterygian fauna from the Lower Carboniferous Albert shale formation of New Brunswick, Canada – a review of previously described taxa and a description of a new genus and species [PDF]

open access: yes, 2017
The Lower Carboniferous Albert shale formation of New Brunswick, Canada, is well-known for the preservation of countless articulated lower actinopterygian palaeoniscoid fishes. This site is at the boundary between the Devonian and the Lower Carboniferous,
Mickle, Kathryn E.
core   +2 more sources

Pulses of enhanced continental weathering associated with multiple Late Devonian climate perturbations: Evidence from osmium-isotope compositions

open access: yesPalaeogeography, Palaeoclimatology, Palaeoecology, 2019
Anomalously high rates of continental weathering have frequently been proposed as a key stimulus for the development of widespread marine anoxia during a number of Late Devonian environmental and biospheric crises, which included a major mass extinction ...
L. Percival   +8 more
semanticscholar   +1 more source

Are the Chinese Altai “terranes” the result of juxtaposition of different crustal levels during Late Devonian and Permian orogenesis?

open access: yesGondwana Research, 2019
The general structure of the Chinese Altai has been traditionally regarded as being formed by five tectono-stratigraphic ‘terranes’ bounded by large-scale faults.
A. Broussolle   +8 more
semanticscholar   +1 more source

Evidence from Rb–Sr mineral ages for multiple orogenic events in the Caledonides of Shetland, Scotland [PDF]

open access: yes, 2015
Shetland occupies a unique central location within the North Atlantic Caledonides. Thirty-three new high-precision Rb–Sr mineral ages indicate a polyorogenic history.
Bird, A. F.   +3 more
core   +3 more sources

The fossil record of early tetrapods: worker effort and the end-Permian mass extinction [PDF]

open access: yes, 2010
It is important to understand the quality of the fossil record of early tetrapods (Tetrapoda, minus Lissamphibia and Amniota) because of their key role in the transition of vertebrates from water to land, their dominance of terrestrial faunas for over ...
Bebber D.F.   +18 more
core   +3 more sources

Late Devonian-Carboniferous tectonic evolution within the Firth of Forth, Midland Valley : as revealed from 2D seisimic reflection data [PDF]

open access: yes, 2003
Results of integrated seismic mapping, within the Firth of Forth in the offshore Midland Valley of Scotland, are presented and illustrate aspects of the subsurface structure and tectonic evolution of the Upper Devonian to Carboniferous succession ...
Browne, M.A.E.   +3 more
core  

First articulated phyllolepid placoderm from North America, with comments on phyllolepid systematics [PDF]

open access: yes, 2013
Copyright 2013 The Academy of Natural Sciences of Philadelphia. Published version of the paper reproduced here with permission from the publisher.The first articulated phyllolepid placoderm from North America (outside of Greenland) is described from the ...
Daeschler, EB, Long, John A
core   +1 more source

Fossil evidence of tylosis formation in Late Devonian plants

open access: yesNature Plants, 2023
Tyloses are swellings of parenchyma cells into adjacent water-conducting cells that develop in vascular plants as part of heartwood formation or specifically in response to embolism and pathogen infection. Here we document tyloses in Late Devonian (approximately 360 Myr ago) Callixylon wood. This discovery suggests that some of the earliest woody trees
Decombeix, Anne-Laure   +5 more
openaire   +5 more sources

An ontological morphological phylogenetic framework for living and extinct ray‐finned fishes (Actinopterygii)

open access: yesThe Anatomical Record, EarlyView.
Abstract The ray‐finned fishes include one out of every two species of living vertebrates on Earth and have an abundant fossil record stretching 380 million years into the past. The division of systematic knowledge of ray‐finned fishes between paleontologists working on extinct animals and neontologists studying extant species has obscured the ...
Jack Stack
wiley   +1 more source

Birth and demise of the Rheic Ocean magmatic arc(s): Combined U–Pb and Hf isotope analyses in detrital zircon from SW Iberia siliciclastic strata [PDF]

open access: yes, 2017
Paleozoic continental reconstructions indicate that subduction of Rheic oceanic lithosphere led to collision be- tween Laurussia and Gondwanawhich was a major event in the formation of the Ouachita-Appalachian-Variscan orogenic belt and the amalgamation ...
Drost, Kerstin   +5 more
core   +3 more sources

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