Late Devonian time was a period of rapid upheaval in the Earth system, including climate change, sea level changes, widespread ocean anoxia, and Frasnian-Famennian mass extinction; cause(s) these changes remain(s) uncertain. The Lennard Shelf Canning Basin Western Australia contains carbonate reef sections spanning much Epoch has been sampled for paleomagnetic analysis with studies by Hansma co...

The Earn Group of central Yukon records the transition from a passive to an active margin along western Laurentia in Late Devonian. Fine-grained clastic rocks and chert lower contain late Early Middle Devonian fossils were deposited offshelf environment. upper comprises mixture sandstone conglomerate, fine-grained siliciclastic rocks, widespread crystal lithic tuff. Zircons this succession are ...

Abstract The Drewer quarry located in the Rhenish Massif is a well-studied outcrop that comprises Upper Devonian (Famennian) to Lower Carboniferous (Viséan) strata. Within deposits two black shale intervals have been described are linked global oceanic anoxic events, Hangenberg Event and Alum Shale Event. shales associated with Middle Tournaisian contain abundant phosphatic concretions, which w...

The diversification of the tetrapod stem group occurred during the late Middle through the Late Devonian, that is from the Givetian to Famennian stages about 385-365 million years ago. The relationships between the known taxa representing this radiation have currently reached a reasonable consensus so that interpretations of the order of appearance of tetrapod characters is possible. The immedi...

Edenopteron keithcrooki gen. et sp. nov. is described from the Famennian Worange Point Formation; the holotype is amongst the largest tristichopterids and sarcopterygians documented by semi-articulated remains from the Devonian Period. The new taxon has dentary fangs and premaxillary tusks, features assumed to be derived for large Northern Hemisphere tristichopterids (Eusthenodon, Hyneria, Lang...

The evolution of land plant root systems occurred stepwise throughout the Devonian, with first evidence complex appearing in mid-Givetian. This biological innovation provided an enhanced pathway for transfer terrestrial phosphorus (P) to marine system via weathering and erosion. enhancement is consistent paleosol records has led hypotheses about causes eutrophication mass extinctions during Dev...