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Development of a quartz-based geothermometer for biogenic chert. [PDF]

open access: yesSci Rep
Tanaka H   +3 more
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Assessing Fluoride Concentrations in Iowa's Groundwater and Drinking Water: Implications for Public Health and Water Management. [PDF]

open access: yesEnv Sci Adv
Thompson DA   +9 more
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A Silurian pseudocolonial pterobranch

Current Biology, 2023
Pterobranchs, a major group of the phylum Hemichordata, first appear in the fossil record during the Cambrian,1 and there are more than 600 fossil genera dominated by the mainly planktic graptolites of the Paleozoic, which are widely used as zone fossils for correlating sedimentary rock sequences.2 Pterobranchs are rare today; they are sessile marine ...
Derek E.G. Briggs   +1 more
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Silurian

Geological Society, London, Memoirs, 1992
Abstract The history of establishment of the Silurian System (and hence of the Silurian Period) and its principal divisions has been reviewed by Cocks et al . (1971) and Holland (1984, 1989 a ).
M. G. Bassett   +4 more
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