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Hercynian orogeny
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Thrust faults
Orogeny The terms orogeny and orogenesis are synonymous for tectonic processes that result in the formation of mountain chains . Orogeny and orogenesis are derived from the Greek words oros, meaning mountain, and geneia, meaning born. Orogeny can also have a time connotation when used in naming... Read more |
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Avalon Peninsula
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... Read more |
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metamorphic rocks
metamorphic rock An aggregate of minerals formed by the recrystallization of pre-existing rocks in response to a change of pressure, temperature, or volatile content. Metamorphic rocks can generally be divided into four types: (a) regional metamorphic rocks, formed in response to changes leading to... Read more |
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Rocky Mountains
Rocky Mountains major mountain system of W North America and easternmost belt of the North American cordillera, extending more than 3,000 mi (4,800 km) from central N.Mex. to NW Alaska; Mt. Elbert (14,431 ft/4,399 m) in Colorado is the highest peak. The Rockies are located between the Great Plains... Read more |
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Acadians
ACADIANS by Evan Heimlich Overview Acadians are the descendants of a group of French-speaking settlers who migrated from coastal France in the late sixteenth century to establish a French colony called Acadia in the maritime provinces of Canada and part of what is now the state of... Read more |
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Cajuns
Cajuns ETHNONYMS: Acadians of Louisiana Orientation Identification. The Cajuns are a distinct cultural group of people who have lived mainly in south-central and Southwestern Louisiana since the late eighteenth century. In the past, because of their Acadian heritage, residential... Read more |
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Truro
Truro , town (1991 pop. 11,683), central N.S., Canada, near the head of Cobequid Bay, an arm of the Bay of Fundy. It is a railroad and industrial center, with lumber mills, printing plants, and other factories. The Nova Scotia Agricultural College there is the headquarters of the provincial... Read more |
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Abbeville
Abbeville , city (1990 pop. 11,187), seat of Vermilion parish, S La., on the Vermilion River, with access to the Intracoastal Waterway ; inc. 1850. It is a trade and processing center for a region of rice and sugarcane fields. There is fishing for crawfish, alligator, and crab, as well as varied... Read more |
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Acadia
Acadia , Fr. Acadie, region and former French colony, E Canada, encompassing modern Nova Scotia but also New Brunswick, Prince Edward Island, and coastal areas of E Maine. After an abortive 1604 settlement of St. Croix (Dochet) Island, in the Saint Croix River, the chief town, Port Royal (now ... Read more |
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Acadian orogeny
Acadian orogeny A phase of mountain building affecting an area from the northern Appalachians...uncertain, and was most intense east of the Taconic area (see TACONIC OROGENY). It was caused by the westward movement of the Avalon terrane. See... |
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Appalachian orogenic belt
...strike include the Caledonian orogenic belt (see CALEDONIAN OROGENY) in north-western Europe, now separated by the Atlantic...from late Precambrian to Permian, divided into four major orogenies (Avalonian, Taconic, Acadian, and Alleghanian), with the transport of ... |
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Insights into the Acadian orogeny, New England Appalachians: a provenance...
...the initial stages of the Acadian orogeny may have uplifted...has been written about the Acadian orogeny than any other New...et al.ngland part of the Acadian orogeny remains. The orogenies of the New ... |
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A Rheic cause for the Acadian deformation in Europe
...Meguma was responsible for the Acadian Orogeny on Western Avalonia (Schenk 1997...the proposed Rheic origin of the Acadian shortening phase is not compatible...constrain allowable kinematics of the Acadian Orogeny in Europe. Exten |
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Distinct Taconic, Salinic, and Acadian deformation along the Iapetus suture...
...with the Ordovician Taconic orogeny and involved accretion of...Salinic and Silurian-Devonian Acadian orogenies, which involved the subsequent...Silurian to Early Devonian Acadian, Middle Devonian to Early...Carboniferous to Permian Alleghenian ... |
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Acadian deformation in the shallow crust: an example from the Siluro-Devonian...
...in the shallow crust during the Acadian orogeny, one of the most regionally extensive...in the shallow crust during the Acadian orogeny in mainland Nova Scotia...deformation during the Middle Devonian Acadian orogeny. The ... |
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New U-Pb and Rb-Sr constraints on pre-Acadian tectonism in North Wales
...significantly predated the mid-Devonian Acadian Orogeny often associated with terminal...southern Britain evidence for pre-Acadian deformation is relatively sparse...Indeed, even the assignment of the Acadian Orogeny to the collision ... |
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Evidence for post-Acadian through Alleghanian deformation in eastern Maine:...
...the formation of the post-Acadian (Carboniferous?) redbed...to the Permian Alleghanian orogeny. Paleostress analyses based...during the transition from the Acadian (late Silurian to middle...the Alleghanian (Permian) orogenies is poorly understood ... |
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U-Pb zircon geochronology of the Galway Granite, Connemara, Ireland:...
...implications for correlations between Acadian plutonism in New England and in western...North Atlantic region, the Caledonian Orogeny embraces Cambrian to Devonian tectonic...and east (McKerrow et al. 2000). The orogeny includes several tectonic phases, many... |
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Alleghanian faulting in the southern Gaspe Peninsula of Quebec.
...readjustments after the Middle Devonian Acadian Orogeny. Four SW-striking fault systems with post-Acadian sinistral motion that have been identified...INTRODUCTION Following identification of post-Acadian (post-Middle Devonian) paleostress... |
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Geochemistry of Sainte-Marguerite volcanic rocks: implications for the...
...deposited between the Taconian and Acadian orogenies in the Gaspe Peninsula, Quebec...Peninsula between the Taconian and Acadian orogenies could account for these...Peninsula; Pincivy 2003) and Devonian Acadian orogenies. ... |
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Investigators at Brigham Young University Zero in on General Science.
...during the early stages of the Acadian Orogeny in northern Maine," investigators...subsiding basin prior to the onset of Acadian deformation. Subsidence was accompanied...possible tectonic models of the Acadian Orogeny and the ... |
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