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2007 UW ESS spring break field trip to southern Utah Jody Bourgeois--intro

2007 UW ESS spring break field trip to southern Utah Jody Bourgeois--intro. Zion--UW spring break early 1980s. Escalante -- UW spring break field trip c. 1990. Capitol Reef spring break UW camp. Zion spring break UW camp. Capitol Reef Spring break UW hike c. 1990. THEMES.

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2007 UW ESS spring break field trip to southern Utah Jody Bourgeois--intro

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  1. 2007 UW ESS spring break field trip to southern Utah Jody Bourgeois--intro

  2. Zion--UW spring break early 1980s

  3. Escalante -- UW spring break field trip c. 1990

  4. Capitol Reef spring break UW camp Zion spring break UW camp

  5. Capitol Reef Spring break UW hike c. 1990

  6. THEMES • Mesozoic paleogeography • Mostly we’ll see Triassic and Jurassic rocks • Non-marine paleoenvironments • Surface processes

  7. Paleogeography • Late Permian • Pangea [Utah at the far limit] • Locally ~quiet tectonically • Extreme environments • shallow marine & • eolian sediments Dott and Prothero

  8. Triassic fluvial & playa sediments Moenkopi Permian limestone Cutler ~ Kaibab [eolian sediments below ~Coconino, other units in Canyonlands and Arches] Permo-Triassic boundary in Capitol Reef National Park

  9. Permian non-marine sediments in southeastern Utah -- Canyonlands NP

  10. Triassic • Beginning westward plate motion • but no real evidence where we’ll be • Fluvial, playa & eolian sediments • Petrified forest Dott and Prothero

  11. Shinarump [basal Chinle] Moenkopi

  12. Moenkopi playa deposits Zion & Capitol Reef evaporites & ripples

  13. Upper Triassic fluvial and eolian Chinle [petrified forest, painted desert] fluvial and paleosols Shinarump [basal Chinle] coarse fluvial conglomerate Moenkopi

  14. Zion National Park Coal Pits Wash hike Petrified wood, base of Chinle

  15. QUIZ

  16. QUIZ Upper Triassic Chinle Shinarump Moenkopi

  17. Triassic --> Jurassic Navajo Sandstone, Zion National Park View from Angels Landing

  18. Jurassic • Plate tectonic setting similar to Triassic • Sea level beginning to rise globally • Mostly TONS OF eolian sediments • Some shallow-marine incursions • Famous dinosaur localities • [but we won’t see them] Dott and Prothero

  19. Navajo Sandstone Escalante Canyon

  20. giant eolian cross-bedding Zion National Park

  21. possible Jurassic impact -- strong shaking -- mega-soft-sediment deformation

  22. Dott and Prothero millions of years ago

  23. Carmel Fm. Temple Cap Zion National Park

  24. evaporite crystals [bedding plane] oyster fossils Carmel Fm, Zion NP cyanobacterial mat lamination

  25. Henry Mountains [Tertiary laccoliths] Cretaceous Upper Jurassic

  26. Cretaceous • Sevier orogeny—major thrusting, uplift to west • Cretaceous interior seaway in North America • Fluvial sediments to west, marine to east • Deltas and coal deposits • Non-marine and marine reptiles Dott & Prothero

  27. Cretaceous Mancos Shale, Utah

  28. Cretaceous shallow-marine sediments near Price, Utah Cretaceous deltaic sediments "Book Cliffs" Utah

  29. Capitol Reef National Park “Waterpocket fold” a Laramide monocline

  30. Cenozoic non-marine sediments Bryce National Park

  31. Bryce in March

  32. Cenozoic volcanic cone, Zion National Park

  33. Henry Mountains Utah Cenozoic laccoliths G.K. Gilbert, 1877

  34. x Cryptogamic soil Capitol Reef National Park

  35. Zion National Park "aerial" view from Angels Landing

  36. Capitol Reef National Park

  37. Navajo Upper Triassic red beds Chinle Chinle Shinarump Moenkopi Capitol Reef National Park

  38. 2007 UW ESS spring break field trip to southern Utah Waterpocket monocline, Capitol Reef National Park

  39. LET'S GO! The Great Arch Zion National Park

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