esas0601temp_Laramide-stu - EARTHSCIENCEin ARIZONAandthe...

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The Laramide Orogeny lifts the Southwest Late Cretaceous to Mid‐Paleogene (U.S. Geological Survey, 2007) Open‐pit copper mine, Morenci, Arizona (P. Kresan) EARTH SCIENCE in ARIZONA and the SOUTHWEST
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2 The Laramide Orogeny lifts the Southwest (Ron Blakey) North America at 65 Ma (Cretaceous‐Paleogene boundary, also Mesozoic‐Cenozoic boundary) North Atlantic now opening up Western Interior Sea almost gone Southwest emerges from interior sea
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3 The Laramide Orogeny lifts the Southwest (Ron Blakey) The Southwest at 65 Ma
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4 The Laramide Orogeny lifts the Southwest Sevier Orogeny gives way to Laramide Orogeny ~80‐50 Ma Named for Laramie WY “flat‐slab” subduction (After Humphreys et al., 2003) Major deformation moves inboard!
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5 The Laramide Orogeny lifts the Southwest (Reynolds, Johnson, Kelly, Morin, & Carter, 2010) The Southwest was at or near sea level during the late Cretaceous Period; the Laramide Orogeny began the process of lifting it high!
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6 The Laramide Orogeny lifts the Southwest
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