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Polyphase Laramide Structures And Possible Folded Tertiary(?) Sills At Dagger Mountain, Big Bend National Park, Texas, Jeff Cullen, Nathan K. Knox, Jacob Crouch, Joseph I. Satterfield
Polyphase Laramide Structures And Possible Folded Tertiary(?) Sills At Dagger Mountain, Big Bend National Park, Texas, Jeff Cullen, Nathan K. Knox, Jacob Crouch, Joseph I. Satterfield
The Compass: Earth Science Journal of Sigma Gamma Epsilon
Dagger Mountain, in Sierra del Carmen within Big Bend National Park, Texas, is a 5 km-long, doubly-plunging, southwest-vergent anticline adjacent to a doubly plunging syncline. Dagger Mountain lies near the eastern margins of the Cordilleran orogen and the Basin and Range province. Mapping at 1:12,000 scale reveals details about three phases of Laramide and Basin and Range structures. Mapping and descriptive structural analysis complement previous mapping at 1:12,000 – 1:75,000 scales (Poth, 1979; Moustafa, 1988; Cooper and others, 2011; Turner and others, 2011; Maxwell and others, 1967). Four distinctive formations of Cretaceous age crop out on Dagger Mountain: Santa Elena …