Results 151 to 160 of about 7,798 (251)

First Occurrence of <i>Wronascolex</i> sp. (Palaeoscolecida, Priapulida) in the Cambrian Tianpeng Formation (Wuliuan Stage), Southeastern Yunnan, South China: Implications for a New Burgess Shale-Type Lagerstätte. [PDF]

Life (Basel)
Xiao SY, Chen LR, Zhang ST, Zhang D, Chen XC, Hu YK, Song QY, Yang XQ, Zuo RH, Zhang GX.   +9 more
europepmc   +1 more source

Failure characteristics and the energy criterion of rock with a through‐going joint under true‐triaxial unloading conditions: Insights from the DEM model

Deep Underground Science and Engineering, Volume 5, Issue 2, Page 465-481, June 2026.
The rock failure mode is significantly influenced by the contributing factors, such as the joint inclination, the initial confining pressure, and the unloading point. We found six typical rock failure modes after a large number of numerical tests. Abstract Excavation unloading damages rock masses, with preferential failure along geological defects in ...
Fei Liu, Changhui Liang, Sijia Liu, Yongjun Zhang, Luo Wang   +4 more
wiley   +1 more source

Study on Acoustic Emission <i>b</i>‑Value Characteristics in Hydraulically Fractured Shale Fracture Propagation under High Confining Pressure Conditions. [PDF]

ACS Omega
Zhao H, Sun W, Liang B, Yang Y, Wang C, Liu Q, Liao B, Bu Y, Zhao Y, Gao Y, Wu X, Zeng X.   +11 more
europepmc   +1 more source

Dynamic tensile strength and fracture evolution of characteristic shale with bedding and hole using linear regression theory

Deep Underground Science and Engineering, Volume 5, Issue 2, Page 426-445, June 2026.
The spiral conical perforations generated during methane in situ explosion fracturing operations lead to tensile fracture propagation in shale reservoirs being governed by the combined effects of impact pressure, bedding, and aperture under explosive loading. Using multiple regression analysis and digital image correlation technology, the mechanisms of
Yabo Chai, Ning Luo, Jianan Zhou, Haohao Zhang, Penglong Li, Yu Wang, Cheng Zhai, Tianran Ma   +7 more
wiley   +1 more source

Efficiency of mining rock wastes in the removal of toxic heavy metal ions (Pb²⁺, Cu²⁺, and Cd²⁺) from contaminated water solutions. [PDF]

Sci Rep
Fathy AT, Moneim MA, Dardir FM, El Ayyat AM, Ahmed EA.   +4 more
europepmc   +1 more source

Hydrothermal Transformation of Organic Matter in the Case of Domanik Shale Deposits. [PDF]

Molecules
Onishenko Y, Tajik A, Vakhin A, Dengaev A, Oscar FK, Sitnov S, Duglav Y, Ismaeel M, Mirzaev O, Aliev F.   +9 more
europepmc   +1 more source

Characteristics of the Coal-Associated Shale and Its Paleoenvironmental Analysis of the Upper Triassic Tumengela Formation in the Central Part of the Qiangtang Basin. [PDF]

ACS Omega
Peng Q, Du B, Yue M, Peng J, Li P, Liu Z, Liu H, Liu X.   +7 more
europepmc   +1 more source

Thicket Formation and Light Limitation Drive Patch‐Scale Vegetation Transitions in a Subtropical Savanna

Ecology and Evolution, Volume 16, Issue 6, June 2026.
Bush encroachment drives a shift from savanna dominated by Vachellia karroo to thicket vegetation. As canopies close, light availability declines, herbaceous cover and species richness decrease, and shade‐tolerant species replace open‐savanna taxa. Woody cover above ca.
Marina R. Khoza, Susanne Vetter
wiley   +1 more source

Origins Under the Blowtorch: Frequent Fire Shifts the Balance Between Sunda‐Origin and Sahul‐Origin Plant Species in a Tropical Savanna

Ecology and Evolution, Volume 16, Issue 6, June 2026.
We examined the effect of fire frequency on the composition of vegetation of different biogeographic origins, to understand how frequently an ecosystem can be subject to fire but still retain its evolutionary diversity. There was dramatic structural and biogeographic change in less than 20 years from dry tropical woodlands into savannas, creating ...
Susanna Rozsa Bryceson, John William Morgan   +1 more
wiley   +1 more source

Distributions and Applications of Nitrogen- and Oxygen-Containing Compounds in the Saline Lacustrine Source Rocks of the Baoding-Raoyang Sag, Bohai Bay Basin, Eastern China. [PDF]

ACS Omega
Liu J, Li S, Li X.
europepmc   +1 more source