Results 61 to 70 of about 59,258 (240)

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

Postcranial remains of basal typotherian notoungulates from the Eocene of northwestern Argentina [PDF]

Acta Palaeontologica Polonica, 2020
Notoungulates represent the most taxonomically diverse and temporally and geographically widespread group among South American native ungulates. Here, we analyze anatomical and systematic aspects of proximal tarsal bones recovered from the Lower and ...
Matías A. Armella, Daniel A. García-López, M. Judith Babot, Virginia Deraco, Claudia M. Herrera, Luis Saade, Sara Bertelli   +6 more
doaj   +1 more source

Upper Cretaceous, K/T boundary, and Paleocene agglutinated foraminifers from Hole 959D (Côte d'Ivoire-Ghana Transform Margin) [PDF]

, 1998
Upper Cretaceous agglutinated foraminifer assemblages from Hole 959D of Ocean Drilling Program (ODP) Leg 159, Côte d’Ivoire-Ghana Transform Margin, reflect the subsidence history and paleoceanography of the widening equatorial Atlantic gateway.
Kaminski, M.A., Kuhnt, W., Moullade, M.
core   +1 more source

Ecological niche modelling does not support climatically-driven dinosaur diversity decline before the Cretaceous/Paleogene mass extinction

Nature Communications, 2019
In the lead-up to the Cretaceous/Paleogene mass extinction, dinosaur diversity is argued to have been either in long-term decline, or thriving until their sudden demise. The latest Cretaceous (Campanian–Maastrichtian [83–66 Ma]) of North America provides
Alfio Alessandro Chiarenza, P. Mannion, D. Lunt, A. Farnsworth, Lewis A. Jones, Sarah-Jane Kelland, P. Allison   +6 more
semanticscholar   +1 more source

Clay mineralogical evidence for mid-latitude terrestrial climate change from the latest Cretaceous through the earliest Paleogene in the Songliao Basin, NE China

Cretaceous research (Print), 2020
. From the latest Cretaceous (late Campanian to Maastrichtian, ~ 76−66 Ma) through the earliest Paleogene, a fluctuating greenhouse climate prevailed and climatic changes were linked to catastrophic geological events and massive biotic extinction ...
Yuanhong Gao, You-feng Gao, D. Ibarra, Xiaojing Du, T. Dong, Zhifei Liu, Chengshan Wang   +6 more
semanticscholar   +1 more source

Development characteristics and controlling factors of fractures in deep-buried tight oil reservoirs of the 3rd member of Paleogene Hetaoyuan Formation in southeast An'peng area, Nanxiang Basin

Shiyou shiyan dizhi
To elucidate the development patterns and influencing factors of natural fractures in deep-buried tight oil reservoirs, a comprehensive evaluation was conducted using a large amount of core samples, thin section, physical property data, imaging and ...
Zheng HUANG, Yongqiang ZHOU, Zixiao HE, Ming LI, Tao YANG, Su WANG, Qiang LI, Ying ZHAO, Shuai YIN   +8 more
doaj   +1 more source

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

Late Maastrichtian pterosaurs from North Africa and mass extinction of Pterosauria at the Cretaceous-Paleogene boundary

PLoS Biology, 2018
Pterosaurs were the first vertebrates to evolve powered flight and the largest animals to ever take wing. The pterosaurs persisted for over 150 million years before disappearing at the end of the Cretaceous, but the patterns of and processes driving ...
N. Longrich, D. Martill, B. Andres
semanticscholar   +1 more source

The Gashatan (late Paleocene) mammal fauna from Subeng, Inner Mongolia, China [PDF]

, 2008
The Paleocene–Eocene boundary is of particular importance for the evolution of mammals and the poorly known Asian mammal faunas from this period have received much attention.
Missiaen, Pieter, Smith, T.
core   +1 more source

Fossil History of Curculionoidea (Coleoptera) from the Paleogene

, 2020
Currently, some 564 species of Curculionoidea from nine families (Nemonychidae—4, Anthribidae—33, Ithyceridae—3, Belidae—9, Rhynchitidae—41, Attelabidae—3, Brentidae—47, Curculionidae—384, Platypodidae—2, Scolytidae—37) are known from the Paleogene ...
A. Legalov
semanticscholar   +1 more source