Results 81 to 90 of about 466,826 (265)

The Earliest Feathers from the Lower Cretaceous Dabeigou Formation of North Hebei: Implications for the Early Evolution of the Jehol Biota

Integrative Zoology, EarlyView.
This study reports two isolated feather fossils from the Lower Cretaceous Dabeigou Formation in northeastern China. Morphological analyses identified them as the earliest known feathered theropods (potentially including avian) in the Jehol Biota. This finding reveals a complex ecosystem at the dawn of the Jehol Biota, bridging the temporal and faunal ...
Qian Wu, Qian‐Nan Zhang, Dang‐Peng Xi   +2 more
wiley   +1 more source

N2 influences on CH4 accumulation and displacement in shale by molecular dynamics

Scientific Reports
N2 is generally employed as a displacement agent to enhance gas recovery in shale gas-bearing reservoirs. However, the primary displacement mechanism in the subsurface still needs to be clarified due to the characteristics of shale reservoirs with low ...
Jiawei Li, Yue Lang, Binhui Li, Yong Liu, Zhejun Pan, Sheikh S. Rahman   +5 more
doaj   +1 more source

High-Precision Density Log Reconstruction Method Based on the RF-Transformer Algorithm

Applied Sciences
Under the backdrop of digital subsurface and intelligent field development, together with sustainable development planning, reliable and continuous well-log measurements are increasingly essential for reservoir evaluation and geological interpretation ...
Junlei Su, Xu Dong, Yu Zeng, Peidong Liu, Xueying Shi, Wenqi Shi   +5 more
doaj   +1 more source

Background levels of heavy metals in surficial sediments of the Gulf of Lions (NW Mediterranean): An approach based on 133Cs normalization and lead isotope measurements [PDF]

, 2005
This paper presents an attempt to reach natural background levels of heavy metals in surficial sediments of the Gulf of Lions(NW Mediterranean). To correct for the grain-size effect, normalization procedures based on a clay mineral indicator element are ...
Ludwig, Wolfgang, Monaco, André, Probst, Jean-Luc, Roussiez, Vincent   +3 more
core   +2 more sources

Between the Indian Ocean and the Gulf: Ceramics From Ḥattā Oasis in the Emirate of Dubai

Arabian Archaeology and Epigraphy, EarlyView.
ABSTRACT This study presents the ceramic finds from archaeological investigations conducted in 2024 at two settlements: ‘Islamic Village' and Suhaila 2, one of a number of mountain villages of the Late Islamic period within the Ḥattā Oasis: a high‐altitude exclave in the Emirate of Dubai. The sites are located on the northeastern slopes of Jabal Qallāt
Seth M. N. Priestman, Agnese Kukela, Mansour Boraik, Hassan Mohammed Zein   +3 more
wiley   +1 more source

Experimental investigation of hydraulic fracture propagation behavior in layered continental shale

Energy Reports, 2022
In this study, numerous triaxial hydraulic fracturing experiments are performed in continental shale outcrop samples and artificial samples with similar properties to investigate the HF propagation behavior under single-cluster and multi-cluster fracturing treatments. The single-cluster fracturing experimental results show that the interlayer interface
Wenjun Xu, Yanxin Zhao, Lei Wang, Feng Jiang   +3 more
openaire   +2 more sources

Research and application of 3D attribute fusion technology based on lithology probability analysis

Scientific Reports
To address the challenges of seismic attribute selection and the low accuracy of characterizing single-phase river channels with a single seismic attribute, a 3D seismic attribute fusion technology based on lithology probability curve analysis has been ...
Shanyi Zhang, Xueying Li, Jinyu Lan, Dejian Zhang, Lin Cong, Yaning Shi   +5 more
doaj   +1 more source

Glyptostrobus europaeus (Brongn.) Heer in Arkansas [PDF]

, 1970
Glyptostrobus europaeus (Brongn.) Heer, a fossil gymnosperm is found at a few locations in central North America, in deposits of the Eocene. This work cites previously reported localities and reports a new site at Hooker, Arkansas.
Wittlake, Eugene B.
core   +2 more sources

Dinosaur footprints from the Duntulm Formation (Bathonian, Jurassic) of the Isle of Skye [PDF]

, 2004
The first in situ dinosaur tracks from Scotland were discovered at the top of the Duntulm Formation (Bathonian, Jurassic) near to Staffin in northeastern Skye.
ANDERSON, BOCK, CLARK, CLARK, HUDSON, LOCKLEY, LOCKLEY, LOCKLEY, LOCKLEY, ROMANO   +9 more
core   +1 more source

Quantitative Characterization of Pore Space for the Occurrence of Continental Shale Oil in Lithofacies of Different Types: Middle Jurassic Lianggaoshan Formation in Southeastern Sichuan Basin of the Upper Yangtze Area

Geofluids, 2021
In addition to marine and marine-continental transitional strata, the continental ones are also widely distributed in various oil and gas-bearing basins in China.
Xiangfeng Wei, Kun Zhang, Qian-wen Li, Dongfeng Hu, Z. Wei, Ruobing Liu, Zhujiang Liu, Jiayi Liu   +7 more
semanticscholar   +1 more source