Results 91 to 100 of about 220,818 (349)

Evidence From Microscopy and U–Pb Geochronology as a Clue to the Influence of the Cretaceous Magmatism in the Diagenesis of Pre‐Salt Carbonate Reservoirs in the Santos Basin (Brazil)

Geological Journal, EarlyView.
Carbonates from Santos Basin revealed U–Pb ages correlated with basalt ages (A), suggesting that they were formed during magmatic events. These events placed hot CO2 in the reservoir, which, when mixed with carbonate‐rich cold water (B), led to thermal convection, enabling the formation of the U contained in the carbonates.
Marco António Ruivo de Castro e Brito, Cristiano Leite Sombra, Davy Raeder Brandão, Cleverson Guizan Silva, Sidney Luiz de Matos Mello, Eugênio Vaz dos Santos Neto, Rui Jorge Fernandes Baptista, Ramsés Capilla, Luiz Antônio Pierantoni Gambôa   +8 more
wiley   +1 more source

Climate and biota of the early Paleogene: recent advances and new perspectives

Geologica Acta, 2009
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V. PUJALTE, A. PAYROS AGIRRE, E. APELLANIZ INGUNZA   +2 more
doaj  

Non-invasive imaging of subsurface paint layers with optical coherence tomography [PDF]

, 2007
Optical coherence tomography (OCT) systems are fast scanning infrared Michelson interferometers designed for the non-invasive examination of the interiors of the eye and subsurface structures of biological tissues.
Hughes, M, Liang, H, Peric, B, Podoleanu, AG, Saunders, D, Spring, M   +5 more
core  

A review of late Quaternary silicic and some other tephra formations from New Zealand: their stratigraphy, nomenclature, distribution, volume, and age. [PDF]

, 1990
The stratigraphic relationships and distribution of 36 named late Quaternary (≤c. 50 000 yr B P.) silicic tephra formations, erupted from 4 volcanic centres—Okataina, Taupo, Maroa, and Tuhua (Mayor Island)—are presented.
Froggatt, Paul C., Lowe, David J.
core   +2 more sources

Analysing the Drivers of Cropland Footprint in Leading Agricultural Nations: Evidence From MMQR Approach

Geological Journal, EarlyView.
ABSTRACT Climate change represents the biggest current challenge for us and for future generations. Its impact on agriculture is undeniable, considering the food security goal. Thus, the cropland footprint has been distinguished as a comprehensive index for assessing the impact of environmental changes in agricultural areas determined by the increased ...
Ibrahim Cutcu, Magdalena Radulescu
wiley   +1 more source

Climate–carbon-cycle interactions and spatial heterogeneity of the late Triassic Carnian pluvial episode

Nature Communications
The Carnian Pluvial Episode (CPE; 234–232 million years ago) is an iconic but poorly understood hyperthermal event. Here, we present an integrated high-resolution (~2–10 kyr) multi-proxy record from a Carnian lacustrine succession of the Junggar Basin of
Xiangdong Zhao, Naihua Xue, Hu Yang, Daran Zheng, Jungang Peng, Joost Frieling, David De Vleeschouwer, Xuewu Fu, Wanglu Jia, Yanan Fang, Sha Li, Meng Wang, Xianye Zhao, Qiang Wang, Haichun Zhang, Jingeng Sha, Hugh C. Jenkyns, Philippe Claeys, Bo Wang   +18 more
doaj   +1 more source

Reconstruction of eolian bed forms and paleocurrents from cross-bedded strata at Victoria Crater, Meridiani Planum, Mars [PDF]

, 2011
Outcrop exposures imaged by the Opportunity rover at Victoria Crater, a 750 m diameter crater in Meridiani Planum, are used to delineate sedimentary structures and further develop a dune-interdune depositional model for the region.
Edgar, L. A., Grotzinger, J. P., Hayes, A. G., Sohl-Dickstein, J., Squyres, S. W., Watters, W. A.   +5 more
core   +1 more source

Mesozoic–Cenozoic Thermochronology of the Tarim–Southern Tianshan System, NW China

Geological Journal, EarlyView.
Tectonothermal history of the Tarim–Southern Tianshan system compared with the major tectonic events at far‐field plate margins. ABSTRACT The Tarim Basin, an oil‐bearing basin in northwest China, is tectonically and sedimentologically linked to the Southern Tianshan Orogenic Belt.
Shuangfeng Zhao, Wen Chen, Jingbo Sun, Ze Shen, Jie Zhang   +4 more
wiley   +1 more source

Cretaceous rudists of Guatemala

Revista Mexicana de Ciencias Geológicas, 2019
A small assemblage of rudists was described in the 1930´s from central Guatemala by MacGillavry and Mullerried… in order to continue, download the full paper in PDF.
Robert W. Scott
doaj  

Are regional stages necessary? [PDF]

, 2005
The bipartition of the Carboniferous System adopted by the International Commission of Stratigraphy for the world stratigraphic chart is impractical in Gondwana.
Gonzalez, Carlos Roberto
core