Results 21 to 30 of about 58,241 (215)
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
Viscous strengthening followed by slip weakening during frictional melting of chert
Earth, Planets and Space, 2019 Pelagic chert is one of the major lithologies in accretionary complexes. Thus, frictional properties of chert at seismic slip rates are important for understanding of earthquake faulting in subduction zones.
Ginta Motohashi +2 more
doaj +1 more source
Controls on development and diversity of Early Archean stromatolites [PDF]
, 2009 The ≈3,450-million-year-old Strelley Pool Formation in Western Australia contains a reef-like assembly of laminated sedimentary accretion structures (stromatolites) that have macroscale characteristics suggestive of biological influence.
A. C. Allwood +11 more
core +3 more sources
Journal of Lithic Studies, 2016 In 2012, during a field survey to locate primary outcrops of cherts in the Carrodilla Mountain Range (Huesca, Spain), abundant remains of chert-knapping were found next to nodular cherts in primary and sub-primary position from the Garumnian limestones ...
Marta Sánchez de la Torre +4 more
doaj +1 more source
Frontiers in Earth Science, 2021 The end-Permian mass extinction (EPME) was the most severe mass extinction event of the Phanerozoic, and was associated with the development of global oceanic anoxia.
Tetsuji Onoue +2 more
doaj +1 more source
Journal of Lithic StudiesThe Oolitic chert is an important raw material for large blade production in Betic Cordillera (Spain) during 4th-3rd mill. BCE. These blades are part of a long-distance trade network of artefacts found in Chalcolithic settlements of southwestern Iberia ...
Patrícia Jordão +3 more
doaj +1 more source
A Geomechanical Study of the Mississippian Boone Formation [PDF]
, 2013 The Boone Formation in northwest Arkansas is a chert-limestone sequence analogous to the subsurface Mississippi Lime reservoir in parts of Oklahoma and Kansas. It has low permeability and produces via horizontal drilling and hydraulic fracturing.
Buckland, Karen Nicole Mason
core +2 more sources
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
Journal of Quaternary Science, EarlyView.Abstract The sedimentary succession at Whittlesey preserves a unique British late Middle Pleistocene to Holocene record back to a time equivalent to at least marine oxygen isotope stage 8 (ca. 250 ka). This study builds on previously published sedimentology, geochronology and palaeoecology results to establish 20 sedimentary facies associations, with ...
H. E. Langford +3 more
wiley +1 more source
Geochemical Data of Scaglia Bianca Chert from Central Italy for Provenance Studies
Journal of Open Archaeology DataThis work presents the first geochemical characterization data of Scaglia Bianca Fm chert from Central Italy. The dataset is part of the chert reference collection (SiliROck) of Sapienza, University of Rome, and includes 110 chert samples collected from ...
Elena Carletti +5 more
doaj +1 more source