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Spanish to English translations [PRO]
Science - Surveying / Mapa Metalogenetico | | Spanish term or phrase: orogenia laramidica | | Extensos macizos (Concordia, Teupasenti, etc.) de composiciOn compleja constan de una mezcla de granitos, granodioritas, andesitas porfiridicas y demas rocas basicas y se extienden en conformidad con la estructuracion del Meal°, sin embargo, parecen haber side reactivados en la orogenia laramidica. Se atribuye a las intrusiones ligadas a esta orogenia la formation de numerosos yacimientos de contacto con las calizas del Cretacico. Las mediciones de edades son todavia demasiado pocas y diseminadas para que se puedan utilizar con efieiencia en la cronologia estratigrafica del pals. |
|  lbottoKudoZ activityQuestions: 1479 (none open) ( 56 closed without grading) Answers: 0
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Barbara L Pavlik
United Kingdom
Local time: 20:00
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3 hrs confidence: laramide orogeny
Explanation:
The Laramide orogeny produced intermontane structural basins and adjacent mountain blocks by means of deformation. This style of deformation is typical of continental plates adjacent to convergent margins of long duration that have not sustained continent/continent collisions. This tectonic setting produces a pattern of compressive uplifts and basins, with most of the deformation confined to block edges. Twelve kilometers of structural relief between basins and adjacent uplifts is not uncommon. The basins contain several thousand meters of Paleozoic and Mesozoic sedimentary rocks that predate the Laramide orogeny. As much as 5000 m of Cretaceous and Tertiary sediments filled these orogenically defined basins. Deformed Paleocene and Eocene deposits record continuing orogenic activity.[4]
During the Laramide orogeny, basin floors and mountain summits were much closer to sea level than today. After the seas retreated from the Rocky Mountain region, floodplains, swamps, and vast lakes developed in the basins. Drainage systems imposed at that time persist today. Since the Oligocene, episodic epeirogenic uplift gradually raised the entire region, including the Great Plains, to present elevations. Most of the modern topography is the result of Pliocene/Pleistocene events, including additional uplift, glaciation of the high country, and denudation and dissection of older Tertiary surfaces in the basin by fluvial processes.[4]
http://en.wikipedia.org/wiki/Laramide_orogeny
Laramide orogeny, a series of mountain-building events that affected much of western North America in Late Cretaceous and Paleogene time. (The Cretaceous Period ended 65.5 million years ago and was followed by the Paleogene Period.) Evidence of the Laramide orogeny is present from Mexico to Alaska, but the main effects appear centred in the eastern portion of the Cordilleran Geosynclinefrom southern Nevada to the Northern Rockies and Northern Cordillera in western Canada, in the Central Rockies of Montana and Wyoming, in the Southern Rockies of Colorado and New Mexico, and in southern Arizona, southwestern New Mexico, and northern ... (100 of 314 words)
http://www.britannica.com/EBchecked/topic/330453/Laramide-or...
| Helena Chavarria
Local time: 21:00
Native speaker of:  English, Spanish
PRO pts in category: 20
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