Lower Devonian

Lower Devonian

[′lō·ər də′vō·nē·ən]
(geology)
The earliest epoch of the Devonian period of geologic time, extending from about 400- to 385,000,000 years ago.
References in periodicals archive ?
New material of Microbrachius from Lower Devonian of Qujing, Yunnan,
A new species of Psilophyton from the Lower Devonian of northern New Brunswick.
In the study area, the older Pampa de los Avestruces granite is Lower Devonian in age and shows evidences of compressive deformation during emplacement (Tickyj et al, 2009a).
The stratigraphic age of these Lower Devonian limestones is Lower Emsian in the presently valid concept but the exact stratigraphic level lies close below the Graptolite Dysoxic Event beds which can be selected as a future Pragian-Emsian boundary (Hladil et al.
Palaeoscorpius devonicus Lehmann, 1944 from the Lower Devonian Hunsruck Slate Lagerstatte in Germany has also been re-investigated (Kuhl et al.
The research also includes an analysis of fossils of a fragmented spine and isolated scales from the Lower Devonian found in northern Spain (Palencia and Cantabrian Mountains) and western France, originally attributed to the Machaeracanthus species.
We believe output from reservoirs other than the currently producing Lower Devonian could extend the plateau beyond 3-4 years.
The Tamadanet Well discharged 5,883 cubic metres of gas per hour (gph) from the Ordovician reservoir (units III 3 and II) and 3,619 cubic metres of gph from the Lower Devonian reservoir F, the source pointed out.
Arthropod trace fossils in the Lower Devonian Jacquet River Formation of New Brunswick.
A new sea spider (Pycnogonida) with a flagelliform telson from the Lower Devonian Hunsruck Slate, Germany.
The regression, which had started in the Silurian and continued with short interruptions also in the lower Devonian (Kemeri time), marks the geocratic period separating the Caledonian and Herzynian tectonic stages (Nestor & Einasto 1997).

Full browser ?