Devonian reefs

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• Devonian Period — Interval of geologic time from 417 to 354 million years ago; it was the fourth period of the Paleozoic Era. During the Devonian, a giant continent was situated in the Southern Hemisphere (see Gondwana), and other landmasses were located in the… …   Universalium

• Devonian — For the Celtic language, see Southwestern Brythonic language; for the residents of the English county, see Devon. Devonian Period 416–359.2 million years ago …   Wikipedia

• Late Devonian extinction — …   Wikipedia

• Eric W. Mountjoy — Eric Walter Mountjoy PhD, FRSC is an award winning Canadian emeritus professor at McGill University. He is a foremost expert on sedimentology, Devonian reefs, carbonate diagenesis, porosity development and the structure of the Rocky Mountains.… …   Wikipedia

• Onychodus — Temporal range: Eifelian–Famennian …   Wikipedia

• History of the petroleum industry in Canada — The Canadian petroleum industry arose in parallel with that of the United States. Because of Canada s unique geography, geology, resources and patterns of settlement, however, it developed in quite different ways. The evolution of the petroleum… …   Wikipedia

• Charles R. Stelck — Charles Richard Stelck, OC, FRSC (born 1917) is an award winning Canadian petroleum geologist, paleontologist, stratigrapher and emeritus professor. His research has yielded many large oil and gas finds in western Canada. Stelck was born in… …   Wikipedia

• Life Sciences — ▪ 2009 Introduction Zoology       In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… …   Universalium

• Silurian Period — Interval of geologic time, 443–417 million years ago. The third period of the Paleozoic Era, the Silurian follows the Ordovician Period and precedes the Devonian. It marks the first appearance of land plants and jawed fishes. The continents were… …   Universalium

• echinoderm — /i kuy neuh derrm , ek euh neuh /, n. any marine animal of the invertebrate phylum Echinodermata, having a radiating arrangement of parts and a body wall stiffened by calcareous pieces that may protrude as spines and including the starfishes, sea …   Universalium

• community ecology — Introduction       study of the organization and functioning of communities (community), which are assemblages of interacting populations of the species living within a particular area or habitat.       As populations of species interact with one …   Universalium