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The Devonian is a geologic period and system of the Paleozoic Era spanning from the end of the Silurian Period, about 416.0 ± 2.8 Mya (million years ago), to the beginning of the Carboniferous Period, about 359.2 ± 2.5 Mya . It is named after Devon, England, where rocks from this period were first studied.

During the Devonian Period the first ray finned and lobe-finned bony fish evolved. The pectoral and pelvic fins of lobe-finned fish evolved into legs as they started to walk on land as tetrapods around 397 Ma. Various terrestrial arthropods also became well-established.

The first seed-bearing plants spread across dry land, forming huge forests.

In the oceans, primitive sharks became more numerous than in the Silurian and the late Ordovician. The first ammonite mollusks appeared. Trilobites, the mollusc-like brachiopods, as well as great coral reefs were still common. The Late Devonian extinction severely affected marine life.

The paleogeography was dominated by the supercontinent of Gondwana to the south, the continent of Siberia to the north, and the early formation of the small supercontinent of Euramerica in between.

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HOCKEY: Welsh woe for Swindon - Swindon Advertiser Tweet this news
Swindon Advertiser--Adrianna Boullosa and Becky Clarke also scored as Swindon overwhelmed their -Devonian- guests. Stokes was elated with the performance, saying: “This really ... - Date : Wed, 27 Oct 2010 07:33:13 GMT+00:00
Cowtown no more: Why Calgary chose Naheed Nenshi - Globe and Mail Tweet this news
Globe and Mail--The -Devonian- Room is an elegant, semicircular dining lounge on the second floor of Calgary's Petroleum Club, panelled in dark wood and lit by a glittering ... - Date : Fri, 22 Oct 2010 23:28:15 GMT+00:00
Downtown 'champion' moves in - Edmonton Journal Tweet this news
Edmonton Journal--EDMONTON - The redeveloped -Devonian- Building is getting engineering consulting firm Stantec as its first ... - Date : Sat, 16 Oct 2010 13:58:33 GMT+00:00
Doubling Down on the Marcellus Shale - Motley Fool Tweet this news
Motley Fool--The Marcellus is meaty on its own, but other stacked plays in the region, such as the Upper -Devonian-, provide extra gravy. A recent Upper -Devonian- ... - Date : Sat, 30 Oct 2010 18:35:34 GMT+00:00
Virgin Territory South Of Edmonton Scene Of Two Important New Wildcat Drilling ... - Nickle's Energy Group Tweet this news
Nickle's Energy Group--They will test all horizons down to and including the -Devonian-, with maximum completion depths of 6500 and 7000 ft. Both wells were staked on basis of ... - Date : Mon, 01 Nov 2010 07:17:18 GMT+00:00

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