Results 11 to 20 of about 94,057 (319)

EFFECT OF PEBBLE SIZE ON GOLD DISTRIBUTION IN THE BANKET SERIES OF THE STRATIGRAPHY IN TARKWAIAN SUPERGROUP [PDF]

open access: diamondGeological Behavior, 2022
The purpose of this research is to establish the relationship between the gold grades and the various pebble sizes from a mine. This objective was reached by choosing parameters of interest from the logging and sampling data, lithological data and assay ...
Matthew Coffie Wilson   +1 more
doaj   +2 more sources

A study of sequence stratigraphy of the Early Cretaceous coal-bearing series in the southeastern Songliao Basin, NE China [PDF]

open access: diamondInternational Journal of Coal Science & Technology, 2020
The Early Cretaceous is an important coal accumulation period in China. Abundant coal resources were formed in the southeastern margin of Songliao Basin.
Kai Shao   +5 more
doaj   +2 more sources

Large Igneous Province Record Through Time and Implications for Secular Environmental Changes and Geological Time‐Scale Boundaries

open access: yesGeophysical Monograph Series, Page 1-26., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Richard E. Ernst   +8 more
wiley  

+15 more sources

An interdisciplinary approach to Iron Age Mediterranean chronology through combined archaeological and 14C-radiometric evidence from Sidon, Lebanon.

open access: yesPLoS ONE, 2023
The construction of the Iron Age Mediterranean chronology began in the Levant based on historical evidence and has been additionally supported in recent decades by means of radiocarbon analysis, although with variable precision and ratification.
Claude Doumet-Serhal   +4 more
doaj   +2 more sources

PETROGRAPHY AND THERMODYNAMIC REACTIONS OF SOME OF THE ROCKS IN THE BANKET SERIES OF THE TARKWAIAN SUPERGROUP [PDF]

open access: yesGeological Behavior, 2023
The Banket Series, which is a paleoplacer deposit, is the third formation in the stratigraphy of Tarkwaian Supergroup. This project seeks to study petrographically; the lithologies in the banket series to confirm the rocks identity as already known or ...
Matthew Coffie Wilson   +1 more
doaj   +1 more source

Sulphur isotope stratigraphy of drill cuttings and stratigraphic correlation of Permian-Triassic evaporites

open access: yesFrontiers in Earth Science, 2023
The stratigraphy of the European late Permian-Triassic commonly lacks chronostratigraphic constraint due to the scarcity of diagnostic fossils for biostratigraphy.
Jack Salisbury   +2 more
doaj   +1 more source

Lithostratigraphic and Paleoenvironmental Characterization of the Senonian Series of the Errachidia-Boudenib-Erfoud Basin, South-East Morocco

open access: yesIraqi Geological Journal, 2023
Six lithostratigraphic sections distributed in different parts of the Errachidia-Boudenib-Erfoud basin (SE Morocco) were surveyed bed by bed and sampled in order to study stratigraphy, analyzed the facies, and characterized the depositional ...
Ismail Chaaou   +2 more
doaj   +1 more source

Sensitivity of isochrones to surface mass balance and dynamics

open access: yesJournal of Glaciology, 2023
The interior of an ice sheet consists of layers of accumulated snow, which contain important information on accumulation and ice dynamics that are imprinted on layer shapes over time.
Alexios Theofilopoulos, Andreas Born
doaj   +1 more source

Quaternary stratigraphic regionalization and comprehensive framework in Nanling and adjacent areas

open access: yes地质科技通报, 2021
The Quaternary sediments in the Nanling and adjacent areas are dominated by alluvial, eluvium and cave deposits, which have lacked of a unified stratigraphic and chronological framework.Based on the results of field survey and research on profiles, the ...
Yuanrun Shi   +4 more
doaj   +1 more source

Multi-scale virtual field experience: sedimentology and stratigraphy of Grand Ledge, Michigan, USA [PDF]

open access: yesGeoscience Communication, 2021
Field experiences are a critical component of undergraduate geoscience education; however, traditional onsite field experiences are not always practical due to accessibility, and the popularity of alternative modes of learning in higher education is ...
M. S. Marshall, M. C. Higley
doaj   +1 more source

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