Results 51 to 60 of about 23,241 (210)

Environmental and climatic proxies for the Cañadón Asfalto and Neuquén basins (Patagonia, Argentina): review of middle to upper jurassic continental and near coastal sequences [PDF]

open access: yes, 2015
In this review, we include several proxies (sedimentology, palynology, invertebrates) from the Cañadón Asfalto and Neuquén basins, to infer the environments and regional climatic context during the Middle to Late Jurassic of Patagonia.
Cabaleri, Nora Graciela   +6 more
core   +1 more source

Astronomically paced changes in overturning circulation in the Western North Atlantic during the middle Eocene [PDF]

open access: yes, 2018
North Atlantic Deep Water (NADW) currently redistributes heat and salt between Earth’s ocean basins, and plays a vital role in the ocean-atmosphere CO2 exchange.
Bickert, Torsten   +9 more
core   +1 more source

A secular increase in continental crust nitrogen during the Precambrian [PDF]

open access: yes, 2017
Recent work indicates the presence of substantial geologic nitrogen reservoirs in the mantle and continental crust. Importantly, this geologic nitrogen has exchanged between the atmosphere and the solid Earth over time. Changes in atmospheric nitrogen (i.
Goldblatt, Colin, Johnson, Benjamin W
core   +3 more sources

Hypotheses to explain the origin of species in Amazonia

open access: yesBrazilian Journal of Biology
The main hypotheses proposed to explain barrier formation separating populations and causing the differentiation of species in Amazonia during the course of geological history are based on different factors, as follow: (1) Changes in the distribution of ...
J. Haffer
doaj   +1 more source

Reconstruction of the Dead (Grey) Dune evolution along the Curonian Spit, Southeastern Baltic [PDF]

open access: yesBulletin of the Geological Society of Finland, 2013
One of the unique places in Europe in both environmental and cultural terms is the Curonian Spit – a massive sandy barrier separating the Curonian Lagoon from the Baltic Sea. Straddling both the Lithuanian and the Russian parts, the spit is included into
N. Dobrotin   +4 more
doaj   +1 more source

Multiple freshwater invasions of the tapertail anchovy (Clupeiformes: Engraulidae) of the Yangtze River

open access: yesEcology and Evolution, 2019
Freshwater fish evolved from anadromous ancestors can be found in almost all continents. The roles of paleogeographic events and nature selection in speciation process often are under focus of research.
Fangyuan Cheng   +3 more
doaj   +1 more source

Academician Vladimir Laskarev (1868-1954) and Paratethys [PDF]

open access: yesGeološki Anali Balkanskoga Poluostrva
Vladimir Laskarev (1868–1954) Russian and Serbian geologist strongly influenced geological literature by introducing a scientific term Paratethys for the series of intercontinental water basins separated from the Mediterranean Sea and the World Ocean by ...
Malakhova Irina   +3 more
doaj   +1 more source

Evolutionary history and identification of conservation units in the giant otter, Pteronura brasiliensis. [PDF]

open access: yes, 2011
The giant otter, Pteronura brasiliensis, occupies a range including the major drainage basins of South America, yet the degree of structure that exists within and among populations inhabiting these drainages is unknown.
Ariani, C.   +19 more
core   +1 more source

Paleozoic paleogeography and biogeography.

open access: yesSpanish Journal of Palaeontology, 2022
An attempt is now being made to reconcile the data of Paleozoic climatically sensitive sediments, such as evaporites, coals, and bauxites, with the contemporary biogeographic data. This attempt results in sorne new paleogeographic reconstructions that are very different from those based on the data of remanent magnetism, and are more consistent with ...
openaire   +1 more source

THE USE OF THE ELEMENTS OF MORPHOECOLOGICAL ADAPTATIONS OF ORGANISMS TO THE ENVIRONMENT UNDER PALEOGEOGRAPHIC RECONSTRUCTIONS OF BIOTAS OF TETIYSKY DESERT-STEPPE REGION (BUILDING SCHEMES OF HISTORICAL FORMATION OF FLORA AND FAUNA)

open access: yesЮг России: экология, развитие, 2016
Aim. The question of life forms (morpho-ecological adaptation of the organism to the environment) is an actual problem of ecological morphology. Different approaches in the study of Coleoptera life forms, including comparative morphological, ontogenetic ...
G. M. Abdurakhmanov   +7 more
doaj   +1 more source

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