Results 31 to 40 of about 72,467 (243)

Tectonic overview of the West Gondwana margin [PDF]

open access: yes, 2008
The oceanic southern margin of Gondwana, from southern South America through South Africa, West Antarctica, New Zealand (in its pre break-up position), and Victoria Land to Eastern Australia is one of the longest and longest-lived active continental ...
Pankhurst, Robert J., Vaughan, Alan P.M.
core   +1 more source

Geologic quadrangle map no. 47 [PDF]

open access: yes, 1978
Process Steps: 1. Either: a) a Portable Document Format (PDF) version of the map provided the Bureau of Economic Geology, University of Texas at Austin was converted from pdf to Tagged Image File Format (TIFF) or b) a paper map was scanned and saved in ...
Barnes, Virgil E. (Virgil Everett), 1903-1998
core   +1 more source

Sedimentary–Tectonic Evolution and Paleogeographic Characteristics of the Paleozoic in the Ordos Basin

open access: yesJournal of Marine Science and Engineering
As a tectonically stable and extensively superimposed basin situated in the North China Craton, the Ordos Basin hosts abundant reserves of oil, natural gas, and coal within its Paleozoic strata, rendering it a focal area in energy-related geological ...
Yuxia Wang   +5 more
doaj   +1 more source

Constraints on Early Paleozoic Deep‐Ocean Oxygen Concentrations From the Iron Geochemistry of the Bay of Islands Ophiolite

open access: yesGeochemistry, Geophysics, Geosystems, 2022
The deep ocean is generally considered to have changed from anoxic in the Precambrian to oxygenated by the Late Paleozoic (∼420–400 Ma) due to changes in atmospheric oxygen concentrations.
Daniel A. Stolper   +5 more
doaj   +1 more source

Functional diversity of marine ecosystems after the Late Permian mass extinction event [PDF]

open access: yes, 2014
Article can be accessed from http://www.nature.com/ngeo/journal/v7/n3/full/ngeo2079.htmlThe Late Permian mass extinction event was the most severe such crisis of the past 500 million years and occurred during an episode of global warming.
A Baud   +49 more
core   +1 more source

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

The achievements of Volodymyr Grytsenko in stratigraphy, paleontology and paleoenvironments and in the field of the geoheritage

open access: yesGeo&Bio, 2018
This paper is about the achievements of V. P. Grytsenko in scientific and pedagogical activity, his discoveries in the field of paleontology and stratigraphy.
M. Reshetnik, K. Rudenko
doaj   +1 more source

RELATIONSHIP BETWEEN THE PALEOZOIC AND CENOSIOIC FAULTING ENSEMBLES IN THE WESTERN PART OF THE ALTAI-SAYAN FOLDED AREA

open access: yesГеодинамика и тектонофизика, 2023
Fault structures in folded areas are an important element of the geological structure. Their age and history of development affect seismicity, distribution of minerals, and engineering and geological characteristics of the area.
I. S. Novikov   +4 more
doaj   +1 more source

Indosinian high-strain deformation for the Yunkaidashan tectonic belt, south China : Kinematics and 40Ar/39Ar geochronological constraints [PDF]

open access: yes, 2007
Structural and 40Ar/39Ar data from the Yunkaidashan Belt document kinematic and tectonothermal characteristics of early Mesozoic Indosinian orogenesis in the southern part of the South China Block.
Bureau of Geology and Mineral Resources of Guangdong Province (GDBGMR)   +90 more
core   +1 more source

Slip versus dilation tendency parameter space as a tool for prospecting structurally controlled geothermal systems in greenfield: insights from the greater Ruhr region

open access: yesDeep Underground Science and Engineering, EarlyView.
This study highlights that with the static and time‐dependent evolution of slip versus dilation tendency parameter space, structurally controlled deep geothermal systems can be selected within areas of higher permeability and lower seismic hazard. Abstract Faults play a vital role in the Earth's hydraulic system by facilitating fluid flow when dilating
Michal Kruszewski   +4 more
wiley   +1 more source

Home - About - Disclaimer - Privacy