Devonian

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Related to Devonian Age: Carboniferous age, Permian Age

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 remaining faunal elements within the Eastport Formation are all known to occur within Silurian and Devonian age deposits alike and are therefore not stratigraphically useful in this context.
The Early Devonian age that is commonly assigned to the Hersey Formation is based on the fact that it interfingers with the assumed Devonian age Eastport Formation.
The Early Devonian age was proposed for the Rezekne RS, using fish faunas in the interregional correlation, among others those from the Eifel Hills sequence (Mark-Kurik 1991, fig.
Primary oil targets will include the Mission Canyon & McGowan formations at 5000 - 8000 feet; the Devonian Age Baaken & Nisku formations at 7000 - 9000 feet.
The Shoshone Range is underlain by siliceous and volcanic rocks of Ordovician and Devonian age, in a complex array of fault slices in the upper plate of the Roberts Mountain Thrust.
The Rubicon et al #7 well encountered natural gas in a shallow reservoir at a depth of 376 feet and tested gas at a stabilized flow rate of 465 MCFD from a six foot interval in the Dundee limestone of Devonian age.
7-230m Zone of pervasive serpentinization-silicification of original Devonian age microgabbro-diorites.
These wells are completed in the Devonian Age, Iquiri sandstone that is the most prolific oil reservoir in Bolivia.
The prospect contains three main stratiform lenses of ankerite, quartz, sphalerite, galena and minor pyrite enclosed in limestone-rich strata of probable Middle Devonian age.
The well discovered oil in the Strunian F1 zone of a Devonian age reservoir.
Primary objective is the Leduc Formation of Devonian age.
FME's 11 exploration permits, totaling 4,874 km2, cover Upper Devonian to Lower Carboniferous sediments/volcanics and their unconformable contact with underlying Palaeoproterozoic metasediments, and granitoids of Proterozoic and Silurian to Early Devonian ages.