geologic considerations in conservation planning southern california december 3-5, 2002 jgrim

72
Geologic Consideration s in Conservation Planning Southern California December 3-5, 2002 JGrim

Upload: milo-washington

Post on 11-Jan-2016

220 views

Category:

Documents


0 download

TRANSCRIPT

Page 1: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Geologic Considerations

inConservation

PlanningSouthern California

December 3-5, 2002JGrim

Page 2: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

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

Page 3: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

California Geology 101

Geologic Time Scale

Rocks

Structure

Plate Tectonics

Process through Time

Page 4: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim
Page 5: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

THE ROCK CYCLE

Page 6: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Rock Types

Igneous

Sedimentary

Metamorphic

Page 7: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Igneous Rocks

Intrusive Igneous

e.g Granite

Page 8: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Granite

Granite Mountains,San Bernardino Co.

Page 9: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Igneous Rocks

Extrusive/Volcanic

(e.g. Basalt)

Page 10: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Pillow Basalt

Conejo Volcanics on Kanan Rd, Santa

Monica Mtns.

Page 11: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Cindercones

Red Hill, just north of Little Lake near

395, Inyo Co.

Page 12: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Volcaniclastic Rocks

Ricardo Group, Red Rock Canyon, Kern

Co.

Page 13: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Sedimentary Rocks

Sandstone

Page 14: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Sandstone & Shale

Sespe Formation near Casitas Pass, Ventura Co.

Page 15: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Sedimentary Rocks

Conglomerate

Eocene Llagas Fm, Rambla Pacifico, Santa Monica Mtns.

Page 16: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Sedimentary Rocks

Breccia

Blackhawk Slide Breccia derived from Furnace Marble

(Rd. 247, San Bernardino Co.)

Page 17: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Metamorphic Rocks

Slate (top) vs. Shale

Page 18: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Metamorphic Rocks

Schist

Page 19: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Metamorphic Rocks

Gneiss (and Skittles)

Page 20: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Serpentenite

North Baker Beach, Presidio

Page 21: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Geologic Structure

Folds

Joints & Fractures

Faults

Page 22: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Geologic Structure results when rocks and sediments are

subjected to:

Tension

Compression

Shear

Uplift

Page 23: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Folds

Page 24: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Ventura Anticline

San Miguelito Anticline in Pico Formation beds

near Ventura

Page 25: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Oil Accumulations in Anticlinal Crests

Page 26: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Natural Oil SeepsOjai Road

Page 27: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Barstow Syncline

Folded Miocene shales and sandstones in

Rainbow Basin (north of Barstow)

Page 28: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Santa Ana Canyon east of Yorba Linda

Page 29: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Joints & Fractures

Page 30: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Joints & Fractures

Campo Reservation, San Diego Co.

Page 31: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Folding & Faulting

Anaverde Formation in San Andreas Fault Zone, Highway 14

near Palmdale

Page 32: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Brittle vs. Ductile Failure

Page 33: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Blind Thrust Faults

Page 34: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Northridge Earthquake, Jan.

1994

Page 35: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Reverse & Thrust Faults

Page 36: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Hollywood and Vine

Page 37: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Normal Faults

Page 38: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

1872 Owens Valley Earthquake

Page 39: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Strike-Slip Faults

Left-Lateral

Right-Lateral

Page 40: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Highway 247

1952 Kern Co. Quake

1992 Lander Earthquake

Hwy 58 west of Hwy 223

Page 41: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

California Geology

Telling the story with Plate Tectonics

Page 42: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

California Geology

Page 43: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Plate Boundaries

Page 44: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Convergent Boundaries-

magmatic intrusions and volcanism

Page 45: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Convergent Boundaries-

Magmatic intrusions and volcanism

Page 46: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Convergent Boundaries-

Magmatic intrusions and volcanism

Page 47: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

California Geology

Page 48: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

California GeologyPRECAMBRIAN (>570 my

bp)

Page 49: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

California GeologyPRE-CENOZOIC (<570 my

bp)

Metamorphics

Page 50: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

California GeologyPALEOZOIC (570-245 my

bp)

Antler Orogeny(approx. 350 my bp)

Page 51: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

California GeologyPALEOZOIC (570-245 my

bp)

SedimentaryVolcanics

Metamorphics

Page 52: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

California GeologyEARLY MESOZOIC (245-150 my

bp)

Sierran Trench

Page 53: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

California GeologyEARLY MESOZOIC (245-150 my

bp)

SedimentaryVolcanics

Metamorphics

Page 54: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

California GeologyMESOZOIC (245-65 my bp)

SedimentaryVolcanics

Metamorphics

Granitics

Page 55: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

California GeologyMID-LATE MESOZOIC (140 my bp)

Franciscan Trench

Page 56: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

California GeologyLATE MESOZOIC (140-65 my bp)

Great Valley Sed.

Page 57: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

California GeologyLATE MESOZOIC (140-65 my bp)

Great Valley Sed.Ultramafics

(Serpentenite)

Page 58: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

California GeologyLATE MESOZOIC (140-65 my bp)

Great Valley Sed.Ultramafics

(Serpentenite)

Franciscan

Page 59: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

The San Andreas “Zipper”

23my

14.5my

7.5my

3my

California GeologyMID-LATE TERTIARY (30-2 my bp)

Page 60: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

California GeologyCENOZOIC [(40) 17-my bp-Pres.]

Volcanics

Page 61: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

California GeologyCENOZOIC (24-2 my bp)

Marine Sedimentary

Sierra Nevada Uplift (3-5 my bp)

Page 62: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

California GeologyLATE CENOZOIC - RECENT

Nonmarine Sedimentary

Page 63: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

The San Andreas “Zipper”

Page 64: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

The San Andreas “Zipper”

Page 65: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

The San Andreas “Zipper”

Page 66: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

The San Andreas “Zipper”

Page 67: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

The San Andreas “Zipper”

Page 68: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

The San Andreas “Zipper”

Page 69: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

The San Andreas “Zipper”

Page 70: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

The San Andreas “Zipper”

Page 71: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

The San Andreas “Zipper”

Page 72: Geologic Considerations in Conservation Planning Southern California December 3-5, 2002 JGrim

Geology of Southern California

Complexity is thy

middle name