publication . Article . 2019

Pulses of enhanced continental weathering associated with multiple Late Devonian climate perturbations: Evidence from osmium-isotope compositions

Percival, L.M.E.; Selby, D.; Bond, D.P.G.; Rachocinski, M.; Racki, G.; Marynowski, L.; Adatte, T.; Spangenberg, J.E; Follmi, K.B.;
Open Access
  • Published: 15 Jun 2019 Journal: Palaeogeography, Palaeoclimatology, Palaeoecology, volume 524, pages 240-249 (issn: 0031-0182, Copyright policy)
  • Publisher: Elsevier BV
  • Country: United Kingdom
Abstract
Anomalously high rates of continental weathering have frequently been proposed as a key stimulus for the development of widespread marine anoxia during a number of Late Devonian environmental and biospheric crises, which included a major mass extinction during the Frasnian–Famennian transition (marked by the Upper and Lower Kellwasser horizons). Here, this model is investigated by presenting the first stratigraphic record of osmium-isotope trends (187Os/188Os) in upper Devonian strata from the Kowala Quarry (Holy Cross Mountains, Poland). Changes in reconstructed 187Os/188Os seawater values to more radiogenic compositions are documented at the base of both the L...
Subjects
free text keywords: Earth-Surface Processes, Palaeontology, Ecology, Evolution, Behavior and Systematics, Oceanography, Perturbation (astronomy), Extinction event, Osmium isotope, Weathering, Late Devonian extinction, Geology, Paleontology, Radiogenic nuclide, Anoxic waters, Devonian
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publication . Article . 2019

Pulses of enhanced continental weathering associated with multiple Late Devonian climate perturbations: Evidence from osmium-isotope compositions

Percival, L.M.E.; Selby, D.; Bond, D.P.G.; Rachocinski, M.; Racki, G.; Marynowski, L.; Adatte, T.; Spangenberg, J.E; Follmi, K.B.;