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Natural History of the Salton Trough

Natural History of the Salton Trough. Salton Trough. Gulf of California. Colorado River Delta. Peninsular Ranges. Cuyamaca Mountains. San Diego. T. U. M. S. T. U. M. S. Limestone. Great Barrier Reef, Australia. ARIZONA. SAN DIEGO. Stable Continental Crust (craton). Limestone.

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Natural History of the Salton Trough

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  1. Natural History of the SaltonTrough

  2. Salton Trough Gulf of California

  3. Colorado River Delta

  4. Peninsular Ranges

  5. Cuyamaca Mountains San Diego

  6. T U M S

  7. T U M S

  8. Limestone Great Barrier Reef, Australia

  9. ARIZONA SAN DIEGO Stable Continental Crust (craton) Limestone Ocean Crust

  10. Paleozoic rocks

  11. Grand Canyon

  12. Paleozoic Limestone Colorado River Delta

  13. Algae removes CO2 - acidity decreases - lime precipitates Ancient Lake Cahuilla

  14. Travertine Point (sort of) Paleozoic Lime (Marble) Holocene Lime (Travertine)

  15. Marble (metamorphosed limestone)

  16. Pangaea Breakup Pangaea’s Breakup ends Paleozoic Stability

  17. Lithospheric Plates

  18. Plate B Plate A Plate C Fig. 3-16b, p. 75

  19. Plate B Plate A Gap: divergent plate boundary Plate C Fig. 3-16b, p. 75

  20. Plate B Plate A Overlap: convergent plate boundary Plate C Fig. 3-16b, p. 75

  21. Sliding: transform plate boundary Plate B Plate A Plate C Fig. 3-16b, p. 75

  22. T U M S

  23. Volcanic Arc Craton Farallon Plate North American Plate

  24. Backbone of Cuyamaca Mountains = Complex of 100’s of Plutons

  25. Batholiths

  26. Accretionary Wedge Forearc Basin (Point Loma / Cabrillo Fm.) Regional Metamorphism (Santiago Peak Volcanics, Julian Schist, Marble) Forearc thrusting and subduction erosion Peninsular Ranges Batholith Metamorphosed wedge sediments (Catalina - Orocopia schists)

  27. Pangaea Breakup Paleocene (58–66 Ma) Pleistocene to Recent (0–1.6 Ma) Pliocene (1.6–5 Ma) Late Cretaceous (66–88 Ma) Middle Cretaceous (88–118 Ma) Miocene (5–24 Ma) Oligocene (24–37 Ma) Early Cretaceous (118–144 Ma) Late Jurassic (144–161 Ma) Eocene (37–58 Ma) Subduction Flattens

  28. T U M S

  29. U Un-roofed batholith Forearc Basin (La Jolla / Poway groups) Undulating peneplain Catalina Schist Uplift Orocopia Schist subduction erosion Underplating Unusually thick Farallon Plate Magma production shifts east

  30. UPLIFTED PENEPLAIN

  31. East Pacific Rise

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