Results 101 to 110 of about 44,585 (300)

Search for impact ejecta at the Paleocene–Eocene boundary

Meteoritics &Planetary Science, EarlyView.
Abstract Almost 10 years have passed since microtektites and microkrystites were reported for the Paleocene–Eocene (P–E) boundary in drill cores and outcrop in New Jersey and in ODP Hole 1051B in the western North Atlantic. The glassy spherules were interpreted to reflect an impact trigger for the Paleocene–Eocene Thermal Maximum (PETM).
Birger Schmitz, Yue Cai, Shiyong Liao, Victoriano Pujalte, Ting Ruan, Robert P. Speijer, Ellen Thomas   +6 more
wiley   +1 more source

Documenting Translation and Vertical-Axis Rotations using Paleomagnetic Techniques along the Panama Isthmus: Preliminary Results

Revista de I + D Tecnológico, 2012
Along the Isthmus of Panama 23 paleomagnetic sites were sampled in order to determine preliminary block rotations and paleolatitudinal movements. The lithology selected for this research corresponds to volcanic and sedimentary rocks with ages ranging ...
César Silva, Germán Bayona, Abraham Osorio, Camilo Montes, Carlos Jaramillo, Luis Santamaría   +5 more
doaj  

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

Paleogene Ficus leaves from India and their implications for fig evolution and diversification [PDF]

, 2023
Kajal Chandra, Robert A. Spicer, Anumeha Shukla, Teresa E.V. Spicer, R.C. Mehrotra, Amit Kumar Singh   +5 more
openalex   +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

Biostratigraphy of the Danian/Selandian transition: A case study from Kamestan anticline section, northwest of Izeh city in Khuzestan province, Southern Iran [PDF]

, 2010
The planktonic foraminifera turnover across the Danian-Selandian boundary (early to late Paleocene, ~60 Ma) has been studied in the Kamestan anticline section. The studied interval span planktonic foraminifera zones P2-P3.
Abbas Sadeghi, Nasrin Hadavandkhani
core   +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

Scientific drilling of the Boltysh impact crater, Ukraine [PDF]

, 2009
Introduction: The Boltysh crater has been known for several decades and was first drilled in the 1960s as part of a study of economic oil shale deposits. Unfortunately, the cores were not curated and have been lost.
Gilmour, I., Jolley, D. W., Kelley, S. P., Watson, J. S.   +3 more
core  

Dinosaur extinction can explain continental facies shifts at the Cretaceous-Paleogene boundary

Communications Earth & Environment
Continental Cretaceous-Paleogene boundary sections are best known from North America, where they invariably exhibit a marked shift in sedimentary facies at or very near the boundary level.
Lucas N. Weaver, Thomas S. Tobin, Courtney J. Sprain, Paige K. Wilson Deibel, Vera A. Korasidis, Mónica R. Carvalho, Pim Kaskes, Isabel M. Fendley   +7 more
doaj   +1 more source

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