Avalonian orogeny An episode of mountain building, named after the Avalon Peninsula of Newfoundland, that occurred about 650–500 Ma ago (Cambrian to Ordovician) as a result of rifting (see RIFT) and volcanicity associated with the opening of the Atlantic. Its rocks are found intermittently from Georgia to Newfoundland. See APPALACHIAN OROGENIC BELT.
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Atlantic mackerel , Scomber scombrus (Atlantic mackerel) See SCOMBRIDAE. Atlantic mackerel (Scomber scombrus) See SCOMBRIDAE. Thrust Faults , Orogeny The terms orogeny and orogenesis are synonymous for tectonic processes that result in the formation of mountain chains . Orogeny and orogenes… Bedrock , Bedrock Bedrock (also termed Bed rock ) is a layer of undisturbed rock usually located beneath a surface layer of soil or other material. In areas of… Mountains , A mountain is any landmass on Earth's surface that rises to a great height in comparison to its surrounding landscape. Mountains usually have more-or… Mountain beaver , mountain beaver See APLODONTIDAE. Metamorphism , Metamorphism is the process by which the structure and mineral content of rocks transform in response to changes in temperature , pressure , fluid co…
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