Results 31 to 40 of about 19,060 (240)

Surface Microtextures of Quartz Grains and Origin of the Paleogene Sands in the Ulyanovsk-Syzran Volga Region

Учёные записки Казанского университета: Серия Естественные науки, 2023
Quartz grains were separated by standard sieving of the Paleogene sands from the Sosnovka Formation of the Ulyanovsk-Syzran Volga region, which are a scarce and valuable raw material for glass making and construction.
S. О. Zorina, K. I. Nikashin, N. I. Afanasieva, N. Hamada   +3 more
doaj   +1 more source

An early Eocene pan-gekkotan from France could represent an extra squamate group that survived the K/Pg extinction [PDF]

Acta Palaeontologica Polonica, 2023
In this paper we describe a new lizard from the early Eocene of the Cos locality in the Quercy region (near the Caylus village, Southwest France). The age of the Cos deposit has been proposed as the MP 10–11 interval, close to the transition of the ...
ANDREJ ČERŇANSKÝ, JUAN D. DAZA, RODOLPHE TABUCE, ELIZABETH SAXTON, DOMINIQUE VIDALENC   +4 more
doaj   +1 more source

Tracing Ancient Migration Routes: Did <i>Gloydius</i> Pitvipers Disperse Across Paleo-Tibet Through Temperate and Subtropical Corridors? [PDF]

Ecol Evol
We investigated the evolutionary and biogeographic history of Himalayan and Hindu Kush Gloydius pitvipers by integrating time‐calibrated phylogenetic analyses with paleoclimatic reconstructions and species distribution modeling. Our results suggest an early Miocene origin in East and Southeast Asia, followed by westward dispersal across Paleo‐Tibet via
Hofmann S, García EP, Flecks M, Jablonski D, Baniya CB, Rödder D, Schmidt J.   +6 more
europepmc   +2 more sources

Main controlling factors for the enrichment of shale oil and significant discovery in second member of Paleogene Funing Formation, Qintong Sag, Subei Basin

Shiyou shiyan dizhi, 2021
Based on the study of hydrocarbon generation features, oil bearing property and reservoir property of shale in the second member of Paleogene Funing Formation in the Qintong Sag of the Subei Basin, the main controlling factors of shale oil enrichment ...
Hongsheng YAO, Ling ZAN, Yuqiao GAO, Caixia HUA, Wenduan YU, Weifeng LUO, Xiaodong MA   +6 more
doaj   +1 more source

Evaluation and influencing factors for brittleness of lacustrine shale reservoir: a case study of Qutang Sub-Sag, Subei Basin

Shiyou shiyan dizhi, 2021
In order to accurately evaluate the brittleness of lacustrine shale and explore its influencing factors, the mineral compositions, geochemical characteristics and reservoir spaces of the lacustrine shale samples from the second member of Paleogene Funing
Biao SUN, Xiaoping LIU, Honglin SHU, Chuangyun JIAO, Gaocheng WANG, Mengcai LIU, Yufeng LUO   +6 more
doaj   +1 more source

Mollusks and a crustacean from early Oligocene methane-seep deposits in the Talara Basin, northern Peru [PDF]

Acta Palaeontologica Polonica, 2020
A total of 25 species of mollusks and crustaceans are reported from Oligocene seep deposits in the Talara Basin in northern Peru. Among these, 12 are identified to the species-level, including one new genus, six new species, and three new combinations ...
Steffen Kiel, Frida Hybertsen, Matúš Hyžný, Adiël A. Klompmaker   +3 more
doaj   +1 more source

Leg 199 summary [PDF]

, 2002
Ocean Drilling Program (ODP) Leg 199, "The Paleogene Equatorial Transect" (Sites 1215-1222), was designed to study the evolution of the equatorial Pacific current and wind system as Earth went from maximum Cenozoic warmth to initial Antarctic glaciations.
Lyle, M., Vanden Berg, M.D., Quintin, L., Wilson, P.A., Backman, J., Pälike, H., Coxall, H.K., Janecek, T.R., Raffi, I., Moore, T.C., Nomura, R., Nigrini, C.A., Faul, K., Tripati, A.K., Parés, J.M., Rea, B.R., Kruse, S., Wade, B.S., Nishi, H., Lanci, L., Hovan, S.A., Lear, C.H., Gaillot, P.A., Knoop, P., Busch, W.H., Norris, R.D., Rea, D.K., Steiger, T.H.   +27 more
core   +1 more source

New early Paleocene (Danian) paguroids from deep-water coral/bryozoan mounds at Faxe, eastern Denmark

Geologija, 2020
During recent decades, decapod crustacean faunas from middle Danian (lower Paleocene) strata at Faxe (Sjælland, Denmark) have been studied in detail. However, paguroid anomurans have not yet been described formally.
Sten L. JAKOBSEN, René H.B. FRAAIJE, John W.M. JAGT, Barry W.M. VAN BAKEL   +3 more
doaj   +1 more source

A new species of Ampulicomorpha Ashmead from Eocene French amber, with a list of fossil and extant Embolemidae (Insecta: Hymenoptera) of the world

BSGF - Earth Sciences Bulletin, 2020
Embolemidae is a cosmopolitan but species-poor group of chrysidoid wasps with a scarce fossil record, despite a long evolutionary history since at least the Early Cretaceous. Here, the new species, Ampulicomorpha quesnoyensis sp. nov., is illustrated and
Chény Cédric, Guillam Elvis, Nel André, Perrichot Vincent   +3 more
doaj   +1 more source

Short note on the first record of fossil shark teeth in the Chehel-Kaman formation, Iran [PDF]

Geološki Anali Balkanskoga Poluostrva, 2020
Shark teeth discovered in the late Paleocene-early Eocene Chehel-Kaman Formation in NE Iran bring new data on the fossil fish record from this country. Two genera from the location are described and figured.
Trif Nicolae, Ghaemi Farrokh, Taheri Jafar, Taherpour-Khalil-Abad Morteza   +3 more
doaj   +1 more source