Marine Anoxia and Ocean Acidification During the End‐Permian Extinction
Geophysical Monograph Series, Page 325-340., 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.
Ying Cui +4 more
wiley +5 more sources
Microfossil-like tourmaline microlites in early Proterozoic nodular chert at Kiihtelysvaara, eastern Finland [PDF]
Bulletin of the Geological Society of Finland, 1992 Many Proterozoic silicified sedimentary carbonates have been reported to contain remains of early micro-organisms. One of these localities in the Fennoscandian Shield is the village of Hyypiä at Kiihtelysvaara in eastern Finland, where a nodular chert ...
J. Karhu, H. O'Brien
doaj +1 more source
Lower Mississippian Chert Development, Southern Midcontinent Region [PDF]
, 2016 The Lower Mississippian Boone Formation is a chert-bearing, fossiliferous limestone typically 100-115m. thick forming the Springfield Plateau across the tri-state region of northwestern Arkansas, southwestern Missouri, and northeastern Oklahoma.
Cains, J. M., Pollock, E. D., Potra, A.
core +2 more sources
Frontiers in Earth Science, 2022 The Middle–Late Permian witnessed an unusual chert accumulation event along the margin of the Pangea and Paleo-Tethys realms, known as the “Permian Chert Event (PCE).” The PCE is well recognized in the Permian limestone from South China, in the forms of ...
Chenqing Li +9 more
doaj +1 more source
A deep subaqueous fan depositional model for the Palaeoarchaean (3.46 Ga) Marble Bar Cherts, Warrawoona Group, Western Australia [PDF]
, 2012 International audienceThe 3.46 Ga Marble Bar Chert Member of the East Pilbara Craton, Western Australia, is one of the earliest and best-preserved sedimentary successions on Earth.
Coltice, Nicolas +5 more
core +4 more sources
Journal of Lithic Studies, 2021 In 2014, an anthropic accumulation of chert material was discovered in La Guinardera area, at the southwest of the Sant Martí de Tous town (Barcelona, NE Iberian Peninsula). In 2018 a first archaeological intervention was carried out in two locations: La
Bruno Gómez de Soler +16 more
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Quartz Crystallinity Index of Arabian Sands and Sandstones
Earth and Space Science, 2021 Although quartz crystallinity index (QCI) was developed more than four decades ago, it remains a relatively new tool used in provenance studies. This study examines QCI values of Arabian sands (Quaternary sands from Nafud, Dahna, and AlRub'AlKhali ...
Omar A. Radwan +2 more
doaj +1 more source
Chemical and oxygen isotopic composition of Roman and late Antique glass from northern Greece [PDF]
, 2017 The present paper emphasizes the importance of measuring the oxygen isotopic and chemical compositions of ancient glass, in order to constrain some features such as age, raw materials, and production technologies and to identify the \u201cfingerprint ...
Dotsika, Elissavet +4 more
core +3 more sources
Chert raw materials and artefacts from NE Bulgaria: A combined petrographic and LA-ICP-MS study
Journal of Lithic Studies, 2014 In the present study two analytical methods are applied to characterize chert artefacts and raw materials from northeastern Bulgaria (Ludogorie region): petrographic observation and laser ablation inductively coupled plasma mass spectrometry ...
Polina Andreeva +2 more
doaj +1 more source
3.46 Ga Apex chert 'microfossils' reinterpreted as mineral artefacts produced during phyllosilicate exfoliation [PDF]
, 2016 We acknowledge the facilities, scientific and technical assistance of the Australian Microscopy & Microanalysis Research Facility at: Centre for Microscopy Characterisation and Analysis, The University of Western Australia; Electron Microscopy Unit, The ...
Brasier, Alexander +4 more
core +1 more source