Articles with "chert" as a keyword



Characterizing southern Baffin Island chert: A cautionary tale for provenance research

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Published in 2018 at "Journal of Archaeological Science: Reports"

DOI: 10.1016/j.jasrep.2016.03.016

Abstract: Abstract The southern Baffin Island chert provenance project was initiated in 2007 to investigate the effects on Palaeo-Eskimo mobility and technological organization of the differential distribution of chert sources in this area of the eastern… read more here.

Keywords: chert; island chert; southern baffin; baffin island ... See more keywords
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Integrating visual and chemical data to source chert artifacts in the North American Great Basin

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Published in 2017 at "Journal of Archaeological Science: Reports"

DOI: 10.1016/j.jasrep.2016.12.037

Abstract: Abstract Studies of toolstone procurement and conveyance in the North American Great Basin have generated an extensive database of geochemistry and provenance over the last few decades, and, more recently, provenance analyses have been extended… read more here.

Keywords: chert artifacts; chemical data; chert; great basin ... See more keywords

Advances in characterizing the cyclostratigraphy of binary chert-mudstone lithologic successions, Permian (Roadian-lower Capitanian), Chaohu, Lower Yangtze, South China

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Published in 2019 at "Palaeogeography, Palaeoclimatology, Palaeoecology"

DOI: 10.1016/j.palaeo.2019.05.004

Abstract: Abstract Successions of Mesozoic and Paleozoic radiolarian-bedded cherts display a “binary” cyclic hierarchy of cm-scale chert and mudstone couplets. Some of these couplet successions contain an apparent imprint of Milankovitch cycles, in which the couplets… read more here.

Keywords: binary chert; chert mudstone; chert; mudstone ... See more keywords

A molecular probe for detecting cholinesterase activity in MRI.

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Published in 2025 at "Proceedings of the National Academy of Sciences of the United States of America"

DOI: 10.1073/pnas.2504547122

Abstract: Cholinesterase (ChE) enzymes terminate action of the neurotransmitter acetylcholine at synapses and neuromuscular junctions throughout the body. Noninvasive strategies for monitoring these enzymes could be important for studying basic biology of cholinergic systems and disorders… read more here.

Keywords: cholinesterase activity; chert; probe; che ... See more keywords

Primary microfossiliferous chert in the Aptian Barra Velha Formation

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Published in 2024 at "Sedimentology"

DOI: 10.1111/sed.13193

Abstract: The Barra Velha Formation and other Aptian pre‐salt deposits record the history of the proto‐Atlantic basin and the rifting of Gondwana. Studies have sought to characterize the depositional environment of the basin with a focus… read more here.

Keywords: chemistry; barra velha; chert; formation ... See more keywords

Viscous strengthening followed by slip weakening during frictional melting of chert

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Published in 2019 at "Earth, Planets and Space"

DOI: 10.1186/s40623-019-1035-5

Abstract: 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. Here, we conducted high-velocity friction… read more here.

Keywords: slip; slip weakening; chert; melting ... See more keywords

The origin of chert in the Aurignacian of Vogelherd Cave investigated by infrared spectroscopy

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Published in 2022 at "PLoS ONE"

DOI: 10.1371/journal.pone.0272988

Abstract: The analyses of raw material provenance offers the possibility of tracing short and long-distance raw material transport. So far, most studies of raw material of flint and chert in Europe have been based on macroscopic… read more here.

Keywords: spectroscopy; raw material; archaeological samples; infrared spectroscopy ... See more keywords