Global ETD Search
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Showing 1 to 4 of 4 for “"Panthalassa"”.
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Marine Deoxygenation Predates the End-Triassic Mass Extinction Within the Equatorial Panthalassa and its Influence on Marine Ecosystems Before the Biotic Crisis
… water marine deposition in eastern equatorial Panthalassa, likely capturing regional oceanic redox trends. δ15N records from Grotto Creek show a pronounced positive excursion of +3‰ that initiates in the upper Norian, peaks near the Norian-Rhaetian boundary (NRB; ~208.5), and declines through …
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Biogeochemical Cycling and Paleoenvironmental Reconstructions of the Toarcian Oceanic Anoxic Event from Western North America
… which was deposited on the eastern margin of the Panthalassa Ocean. The Toarcian carbon isotope excursions (CIEs) in the WCSB confirm that these features are global phenomena. I have suggested a new driver for small-scale CIEs observed during the event: the release of wetland-derived methane …
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The impact of global environmental changes on exceptional preservation, extinction, and recovery in the early Jurassic (late Pliensbachian-Toarcian)
… different geographical locations (Tethys versus Panthalassa Oceans) and depositional settings (shallow water carbonates versus deeper water shales). Scanning Electron Microscopy (SEM) and Energy Dispersive X-Ray Spectroscopy (EDS) analyses showed phosphatization is the main preservation pathway …
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New Constraints For Convergent Margin Plate Tectonic Reconstructions From Imaged And Predicted Mantle Structure
Details of global plate models decrease back in geological time, such that approximately one-third of the Earth surface lacks sufficient plate tectonic constraints by the early Cenozoic ~50 Ma, increasing to >60% uncertainty by the Late Jurassic. The most significant global plate model …