Localities within strata of the Witpoort Formation (Witteberg Group, Cape Supergroup) South Africa provide diverse new fossil material Famennian plants from a high palaeolatitude marginal marine setting. Lycopsid axes with sterile leaves include here diagnosed to two species Colpodexylon Banks 1944. C. pullumpedes sp. nov. Waterloo Farm is ‘short-tipped’ species, whereas mergae Coombs Hill, ‘lo...

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...

In the original description of the Devonian tetrapod Ventastega curonica Ahlberg et al., 1994, Oleg Lebedev mentioned his finding of an uncatalogued, presumed postorbital bone from the Late Devonian of Latvia in the collection of fossil fishes in the Museum f r Naturkunde in Berlin (Ahlberg et al. 1994). The bone bears a dermal sculpture of radially arranged ridges and furrows and is crossed by...

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 ...

Experimental evidence shows that blocking temperature-relaxation time theory for single-domain magnetite can grossly underestimate laboratory thermal demagnetization temperatures of a present day viscous remanence in Devonian limestones of New York State. Thermoviscous remagnetization at moderately elevated burial temperatures during the late Paleozoic cannot therefore be readily excluded for t...