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Geologic Considerations in Conservation Planning for Southern California

This discussion focuses on the geological features and considerations essential for effective conservation planning in Southern California. Topics include foundational California geology, relevant geologic structures, and hazards that must be understood in the context of land management. The presentation will cover the rock cycle, types of rocks, geologic time scales, and the impact of tectonic activities. Participants will gain insights into pertinent NRCS policies, available geological resources, and how these elements intertwine with conservation efforts.

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Geologic Considerations in Conservation Planning for Southern California

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  1. Geologic Considerations inConservation Planning Southern California December 3-5, 2002 JGrim

  2. Discussion Topics 1. California Geology 101 2. Southern California Geology (Lunch) 3. Geologic Considerations in Conservation Planning 4. Geologic Hazards 5. Pertinent NRCS Policies & Procedures 6. Available Resources

  3. California Geology 101 Geologic Time Scale Rocks Structure Plate Tectonics Process through Time

  4. THE ROCK CYCLE

  5. Rock Types Igneous Sedimentary Metamorphic

  6. Igneous Rocks Intrusive Igneous e.g Granite

  7. Granite Granite Mountains, San Bernardino Co.

  8. Igneous Rocks Extrusive/Volcanic (e.g. Basalt)

  9. Pillow Basalt Conejo Volcanics on Kanan Rd, Santa Monica Mtns.

  10. Cindercones Red Hill, just north of Little Lake near 395, Inyo Co.

  11. Volcaniclastic Rocks Ricardo Group, Red Rock Canyon, Kern Co.

  12. Sedimentary Rocks Sandstone

  13. Sandstone & Shale Sespe Formation near Casitas Pass, Ventura Co.

  14. Sedimentary Rocks Conglomerate Eocene Llagas Fm, Rambla Pacifico, Santa Monica Mtns.

  15. Sedimentary Rocks Breccia Blackhawk Slide Breccia derived from Furnace Marble (Rd. 247, San Bernardino Co.)

  16. Metamorphic Rocks Slate (top) vs. Shale

  17. Metamorphic Rocks Schist

  18. Metamorphic Rocks Gneiss (and Skittles)

  19. Serpentenite North Baker Beach, Presidio

  20. Geologic Structure Folds Joints & Fractures Faults

  21. Geologic Structure results when rocks and sediments are subjected to: Tension Compression Shear Uplift

  22. Folds

  23. Ventura Anticline San Miguelito Anticline in Pico Formation beds near Ventura

  24. Oil Accumulations in Anticlinal Crests

  25. Natural Oil Seeps Ojai Road

  26. Barstow Syncline Folded Miocene shales and sandstones in Rainbow Basin (north of Barstow)

  27. Santa Ana Canyon east of Yorba Linda

  28. Joints & Fractures

  29. Joints & Fractures Campo Reservation, San Diego Co.

  30. Folding & Faulting Anaverde Formation in San Andreas Fault Zone, Highway 14 near Palmdale

  31. Brittle vs. Ductile Failure

  32. Blind Thrust Faults

  33. Northridge Earthquake, Jan. 1994

  34. Reverse & Thrust Faults

  35. Hollywood and Vine

  36. Normal Faults

  37. 1872 Owens Valley Earthquake

  38. Strike-Slip Faults Right-Lateral Left-Lateral

  39. Highway 247 1992 Lander Earthquake 1952 Kern Co. Quake Hwy 58 west of Hwy 223

  40. California Geology Telling the story with Plate Tectonics

  41. California Geology

  42. Plate Boundaries

  43. Convergent Boundaries- magmatic intrusions and volcanism

  44. Convergent Boundaries- Magmatic intrusions and volcanism

  45. Convergent Boundaries- Magmatic intrusions and volcanism

  46. California Geology

  47. California Geology PRECAMBRIAN (>570 my bp)

  48. California Geology PRE-CENOZOIC (<570 my bp) Metamorphics

  49. Antler Orogeny (approx. 350 my bp) California Geology PALEOZOIC (570-245 my bp)

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