Results 101 to 110 of about 37,171 (241)

The making of pure quartzose sand in continental interiors: Paraná River (Brazil and Argentina)

Sedimentology, EarlyView.
ABSTRACT As part of a comprehensive project on sedimentary processes in South America, this study focuses on sediment generation in the intracratonic Paraná Basin and monitors the evolution of sand composition along the Paraná River from central Brazil to the Río de la Plata estuary in Argentina.
Eduardo Garzanti, Marta Barbarano, Mara Limonta, Guido Pastore, Pieter Vermeesch, Giovanni Vezzoli   +5 more
wiley   +1 more source

Characteristics and controlling factors of Paleogene deep reservoir in northern area of Huizhou Sag， Pearl River Mouth Basin

Youqi dizhi yu caishoulu
Multiple marginal subsags in the northern South China Sea Basin have been confirmed as subsags with rich hydrocarbon， but unclear favorable reservoir controlling factors have hindered their efficient development.
WU Lianhua, XIONG Lianqiao, ZHAO Zhongxiang, CHEN Ying, HE Youbin, LIU Shengqian, BAI Zhizhao, YAN Yuyang   +7 more
doaj   +1 more source

The Role of Gene Flow in the Diversification of the Monkey Treefrog Complex Across the South American Dry Diagonal

Zoologica Scripta, EarlyView.
ABSTRACT Understanding Neotropical megadiversity remains challenging due to fundamental taxonomic issues, including identifying and describing cryptic species and their distribution, and the limited knowledge of key factors driving biological diversification. Such challenges are especially prominent in diverse clades with high levels of cryptic species,
Felipe Camurugi, Vinícius A. São Pedro, Felipe Magalhães, Marcelo Gehara, Eliana F. Oliveira, Gabriel C. Costa, Frank T. Burbrink, Edward A. Myers, Guarino R. Colli, Miguel T. Rodrigues, Adrian A. Garda   +10 more
wiley   +1 more source

Microscopic pore structure characteristics and mobility of shale oil reservoirs in Liushagang Formation, Weixinan Sag, Beibu Gulf Basin

Shiyou shiyan dizhi
Shale oil reservoirs are characterized by tightness and strong heterogeneity, and the microscopic pore structures affect the storage and flow of shale oil in reservoirs.
Junjun YOU, Desheng HU, Zhenzhu YUAN, Gang ZHOU, Li JIANG   +4 more
doaj   +1 more source

Magnetostratigraphy of the Hell Creek and lower Fort Union formations in northeast Montana [PDF]

, 2010
Magnetostratigraphic evaluation of a well-exposed stratigraphic section in northeast Montana has been undertaken to expand upon and better understand the timing of the deposition of Hell Creek and Fort Union Formations.
LeCain, Rebecca
core   +2 more sources

Remarks on the type locality and current status of the foraminiferal species Rzehakina epigona (Rzehak, 1895) [PDF]

, 2001
A likely topotype locality is proposed for Rzehakina epigona. As the type specimen of Silicina epigona Rzehak, 1895 is assumed to be lost, we undertook a search for new material in the type area, Zdounky village in Moravia. A single locality provided a
Bubik, M., Kaminski, M.A.
core  

In-situ stress orientation and main controlling factors of deep shale reservoirs in the second member of Paleogene Funing Formation in Gaoyou Sag, Subei Basin

Shiyou shiyan dizhi
The shale oil resources in the second member of the Paleogene Funing Formation in the Gaoyou Sag, Subei Basin exceed 700 million tons. However, the complex geological conditions of both its structure and stress significantly impact the shale oil ...
Zeyu YAN, Bing LIANG, Yaxiong SUN, Hongliang DUAN, Xuming QIU   +4 more
doaj   +1 more source

A terrestrial snake from the lower Eocene of the mid-Atlantic region (Nanjemoy Formation, Virginia) of North America

Acta Palaeontologica Polonica
We report on the oldest vertebra of a terrestrial snake from the Paleogene of eastern North America. The nearly complete trunk vertebra was recovered from the Eocene Nanjemoy Formation of Virginia and is referred to Constrictores, the clade including ...
Adam C. Pritchard, Jacob A. Mccartney, Georgios L. Georgalis, Krister T. Smith   +3 more
doaj   +1 more source

Post Cretaceous/Paleogene boundary recovery of the deep marine ecosystem recorded by benthic foraminiferal morphogroups

Acta Palaeontologica Polonica
The uppermost 2 meters of the Maastrichtian Scaglia Rossa Fm. (Gubbio, Italy) record a notable change in the proportions of morphogroups of deep-water agglutinated foraminifera beginning about 1.4 m below the boundary, where we observe a gradual decrease
Michael A. Kaminski, Syouma Hikmahtiar, Claudia G. Cetean   +2 more
doaj   +1 more source

Organic geochemistry of the crater-fill sediments from Boltysh impact crater, Ukraine [PDF]

, 2009
The Boltysh impact crater, is a complex structure formed on the basement rocks of the Ukrainian shield which has been dated at 65.17±0.64 Ma [1]. The Boltysh crater has been know for several decades and was originally drilled in the 1960s-1980s in a ...
Gilmour, I., Gurov, E. P., Jolley, D. W., Kelley, S. P., Watson, J. S.   +4 more
core