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Laramide orogeny |
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Laramide orogenySeries of mountain-building events that affected much of western North America in Late Cretaceous and Early Tertiary time (c. 65 million years ago). The Laramide orogeny originally was believed to mark the Cretaceous-Tertiary boundary. It is now considered to have consisted of many separate pulses of deformation that varied in intensity and age from place to place. Laramide rocks, however, were generally created around the Cretaceous-Tertiary time boundary. Laramide orogeny [′lar·ə·məd ȯ′räj·ə·nē] (geology) How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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In the San Juan Basin, for example, sediments were deposited after the Rocky Mountains were created in the collision of an oceanic plate with North America, an event called the Laramide orogeny. |
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