Results 101 to 110 of about 1,983,107 (202)

Depositional environment and organic matter enrichment mechanism of the lower cambrian shale in the southern Sichuan Basin

Frontiers in Earth Science
The Ediacaran-Cambrian transition was one of the most important periods in Earth’s history. Based on the analysis of lithofacies, mineral composition, total organic carbon major and trace elements, we have studied the depositional environment and organic
Bin Lu, Bin Lu, Du-jie Hou, Cai-neng Zou, Xi-zhe Li, Ri-sheng Gao, Heng-ye Wei, Zhen Qiu   +7 more
doaj   +1 more source

Organic Geochemical Characteristics and Organic Matter Enrichment of the Upper Permian Longtan Formation Black Shale in Southern Anhui Province, South China. [PDF]

ACS Omega, 2023
Ding J, Sun J, Nie H, Yang X, Ye Y, Shi G, Wang R, Huang B, Sun X, Li H.   +9 more
europepmc   +1 more source

Siliceous sponges or seawater as a silicon source? Tracing silicon burial pathways of the Upper Cretaceous opal‐CT deposits using δ30Si and δ7Li

Sedimentology, EarlyView.
ABSTRACT Classical models of formation of sedimentary siliceous rocks (flint, chert, opoka) commonly assume that the Cretaceous marine silicon (Si) cycle was primarily biologically controlled, broadly analogous to the modern ocean. In this framework, siliceous sponges are regarded as the principal source of dissolved silica (dSi) to sediment porewaters,
Agata Jurkowska, Ewa Świerczewska‐Gładysz, Marek Szczerba, Tomáš Magna, Szymon Kowalik Filipowicz   +4 more
wiley   +1 more source

How Particle Size Influences Oxidation of Ancient Organic Matter during Weathering of Black Shale. [PDF]

ACS Earth Space Chem, 2022
Gu X, Brantley SL.
europepmc   +1 more source

Differentiation and Population Structure of Idyla bicristata (Gastropoda: Clausiliidae) on Euboea, Greece

Zoologica Scripta, EarlyView.
ABSTRACT Idyla bicristata is a highly variable rock‐dwelling door snail species living on limestone rocks around the Aegean Sea. The island of Euboea and the adjacent Greek mainland are a hotspot for morphological variability in I. bicristata, resulting in the various forms being named. A population genetic analysis of 23 populations of I.
Elisa Becher, Viktoriia Lebedynska, Jie Xu, Bernhard Hausdorf   +3 more
wiley   +1 more source

Terry M. Black to the Jacksons

, 1966
Terry M. Black, writing from Camp Pendleton, California, to his parents, the Jacksons, in Van Buren, Arkansas, discusses his feelings about his recent leave in Van Buren, the current plans for his unit's deployment, and some of the training and duty he ...
Black, Terry Moore, 1946-2022;
core  

1962 Annual Review, Black Hills National Forest

, 1962
Annual report for the Black Hills National Forest. "GPO 831935.
Black Hills National Forest (Agency : U.S.)
core  

Controlling Factors and Formation Models of Organic Matter Accumulation for the Upper Permian Dalong Formation Black Shale in the Lower Yangtze Region, South China: Constraints from Geochemical Evidence. [PDF]

ACS Omega, 2021
Ding J, Zhang J, Huo Z, Shen B, Shi G, Yang Z, Li X, Li C.   +7 more
europepmc   +1 more source

1959 Annual Review, Black Hills National Forest

, 1959
Annual report for the Black Hills National Forest. "GPO 836822.
Black Hills National Forest (Agency : U.S.)
core  

Geochemical Properties and Gas-Bearing Analysis of Lower Cambrian Black Shale in Western Hunan Province

Energies
Western Hunan province and its surrounding areas are significant targets for shale gas exploration and development in southern China, where the black shale of the lower Cambrian Niutitang Formation and Wunitang Formation is extensively distributed ...
Kaixun Zhang, Xiaoyin Tang, Xiaoqiang Liu, Zisheng Zhao, Meijun Li   +4 more
doaj   +1 more source