Devonian


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Devonian

Geology of, denoting, or formed in the fourth period of the Palaeozoic era, between the Silurian and Carboniferous periods, lasting 60–70 million years during which amphibians first appeared

Devonian

[di′vō·nē·ən]
(geology)
The fourth period of the Paleozoic Era, covering the geological time span between about 412 and 354 × 106 years before present.
References in periodicals archive ?
The sampled Upper Devonian to lower Carboniferous succession, here referred to as the Ghoznavi section (Figs 1, 2), is a natural outcrop located in the eastern Alborz Mountains northeast of Shahrud, on the west side of the road connecting Shahrud and Azadshahr, between the Ghoznavi Bridge and the Tilabad village.
Only one Devonian tetrapod jaw came from Gondwana - the supercontinent which incorporated present day Africa, South America, Australia, Antarctica and India.
Nostolepis striata has been reported from upper Silurian to Lower Devonian deposits almost worldwide, but it seems likely that at least some of these records are from one of the other morphologically similar species.
The residual bitumen stored in the famous Middle Devonian paleoreservoir of Dachang reef is estimated to be tens of millions of tons.
Apart from finds in Jordan, a Devonian light oil discovery made in the 1980s in southern Turkey is said to be sourced by these shales.
In the Devonian period, Waters explained, the world was experiencing super greenhouse climate conditions.
Palaeoscorpius devonicus Lehmann, 1944 from the Lower Devonian Hunsruck Slate Lagerstatte in Germany has also been re-investigated (Kuhl et al.
These places represent Australia through pre-Rodinian and Proterozoic plate tectonic processes, Devonian periods and mass extinction events.
This scenario comes from the late Devonian, about 390 million years ago to roughly 360 million years ago.
The company reiterated its plan to reach a plateau of 46,000 bpd (2.3 mln tons per annum) from the field's principal Devonian reservoir.
The stratigraphy consists of Neoproterozoic Limestone and quartzite, trusting over the Lower to Upper Devonian volcano-sedimentary sequences and intruded by Middle to Upper Devonian Khatanbulag intrusive complex.
After a long period of emergence, movement along the Beagle Bay-Pinnacle and Fenton Faults systems during the Devonian initiated the Fitzroy Trough and separated the Lennard Shelf.