Results 91 to 100 of about 22,802 (265)
Regional variation in the Amitsoq gneisses related to crustal levels during late Archean granulite facies metamorphism: Southern west Greenland [PDF]
The dominant lithology at Kangimut sangmissoq is described as nebulitic tonalitic gneiss containing highly distended plagioclase phyric amphibolites. The gneiss amphibolite complex was intruded by Nuk gneiss between 3.05 and 2.90 Ga and later (2.6 to 2.7
Bridgwater, D. +2 more
core +1 more source
Industrial mineral resources of Zambia [PDF]
, 2000 Zambia has for many years been heavily dependent upon the mining of copper which, combined with cobalt production, represents over 98% of mineral sales and 75% of export earnings (1997 figures).
Mitchell, Clive
core
Sedimentology, EarlyView.ABSTRACT The c. 1 Ga Diabaig Formation of north‐west Scotland preserves diverse lacustrine and fluvial facies and abundant microbial and non‐microbial surficial sedimentary features. 172.6 m of section was logged across seven localities to assess the distribution of microbially induced sedimentary structures (MISS) relative to lithofacies, substrate ...
Seán T. Herron +2 more
wiley +1 more source
Journal of the Geological Survey of Brazil, 2018 Aeromagnetic, petrographic and isotopic data coupled with information obtained from a deep stratigraphic hole (440 m), shallow drillings (
Rogério Cavalcante +8 more
doaj +1 more source
Near Surface Geophysics, Volume 24, Issue 3, Page 234-251, June 2026.Abstract A better understanding of the near‐surface aquifer system of the Caxambu Water Park, located in the Minas Gerais State, Brazil, has been achieved. The study aimed to identify groundwater reservoirs and flow patterns and contribute to the hydrogeological conceptual model using a multi‐scale geophysical approach.
Emanuele F. La Terra +5 more
wiley +1 more source
Seismic imaging of the critical zone of dolerite dykes at Cap Fréhel in Brittany (France)
Near Surface Geophysics, Volume 24, Issue 3, Page 262-288, June 2026.Abstract In June 2023, we measured ten near‐surface seismic profiles to image the critical zone of dolerite (diabase) dykes that cut the sandstone at Cap Fréhel in Brittany (France). Seismic ray tracing and inversion are used to determine the thickness of the regolith layer from first‐arrival P‐wave traveltimes.
M. Zillmer +4 more
wiley +1 more source
Widespread Impact‐Induced Crustal Permeability on the Early Earth
AGU Advances, Volume 7, Issue 3, June 2026.Abstract The early Earth (i.e., Archean and Hadean Eons, 2.5–4.0 and 4.0–4.5 Ga, respectively) experienced frequent cosmic bombardment. Impacts have been shown to stimulate crustal alteration, for instance via hydrothermal systems active for up to millions of years post‐impact.
A. M. Alexander +2 more
wiley +1 more source
Environmental Microbiology Reports, Volume 18, Issue 3, June 2026.Deep biosphere hosted by Archean granitoid basement of Deccan Traps showed depth‐wise microbial partitioning. Limited dispersion and variable selection control community assembly. Fewer abundant bacterial taxa were ubiquitous, while large numbers of rare taxa remained localized.
Rajendra Prasad Sahu +5 more
wiley +1 more source
Archaeometry, Volume 68, Issue 3, Page 409-420, June 2026.ABSTRACT As the capital of Makuria, Tungul was a major sociopolitical center within medieval Nubia, being the seat of a bishopric and a monastic community. During the excavation of the Kom H monastery, three burial crypts (Crypts 1–3) were uncovered.
Robert J. Stark +2 more
wiley +1 more source
The Cretaceous-Tertiary (K/T) impact: One or more source craters? [PDF]
The Cretaceous-Tertiary (K/T) boundary is marked by signs of a worldwide catastrophe, marking the demise of more than 50 percent of all living species. Ever since Alvarez et al.
Koeberl, Christian
core +1 more source