Seismic Section 213 

0

1

2

3000 4000 5000 

TWO-WAY TRAVELTIME, IN SECONDS

(Shotpoints)

0

1

2

1000 2000

Seismic Section 70

TWO-WAY TRAVELTIME, IN SECONDS

(Shotpoints)

6000 5000 

Seismic Section 69

0

1

2

TWO-WAY TRAVELTIME, IN SECONDS

(Shotpoints)

Seismic Section 80 0

1

2

1000 

TWO-WAY TRAVELTIME, IN SECONDS

(Shotpoints)

4000 3000 2000

Seismic Section 81

0

1

2

TWO-WAY TRAVELTIME, IN SECONDS

(Shotpoints)

6000 5000 4000 

Seismic Section 67

0

1

2

TWO-WAY TRAVELTIME, IN SECONDS

(Shotpoints)

2000 3000 

Seismic Section 66 0

1

2

TWO-WAY TRAVELTIME, IN SECONDS

(Shotpoints)

1000 2000 30

Seismic Section 84

TWO-WAY TRAVELTIME, IN SECONDS

0

1

2

(Shotpoints)

3000 Seismic Section 118 2000

0

1

2

TWO-WAY TRAVELTIME, IN SECONDS

1000

Seismic Section 115

0

1

2

TWO-WAY TRAVELTIME, IN SECONDS

(Shotpoints)

?

Palos Verdes Fault

Thums-Huntington Beach Fault

Newport-Inglewood Fault

Santa

Catalina

Island

San

 Pedro

 Shelf

Palos

 Verdes 

 Peninsula

Dana

Point

Long

Beach

Newport

Beach

Huntington 

Beach

Laguna

Beach

San 

 Pedro 

 Basin

Avalon

Knoll

Lasuen

Knoll

Santa

Monica

Bay

 15 km

Major fault

Seismic section with

shotpoint number

81

80

70

213

69

67

118

115

84

4000 66 5000

3000

3000

4000

3000

2000

2000

2000

1000

1000

1

1000 1000

4000

4000

3000

3000

4000

4000

3000

2000

2000

3000

3000

1000

1000

1000 2000

5000

5000

6000

6000

4000 3000 5000 6000 7000

100

80

80

80

60

60

60

60

40

40

40

20

20

20

200

200

300

300

400

400

400

500

500

600

600

600

600

500

400

400

300

200

100

100

100

700

500 600

500

300

200

600

700

700

800

900

800 700

600

600

600

500

200

800

700

500

300

200

100

500

Index Map

San

Gabriel

Canyon

Ridge "A"

Ridge "B"

?

Palos

Verdes F.

Bathymetry in meters

Bathymetric contour interval

 20 m for depth < 100 m

 100 m for depth > 100 m

118 30' W 118 15' 118 00' 117 45' 

33 

45' N

33

30'

33

15'

115

Increase in deformation

 associated with the

 uplift of Lasuen Knoll

Low part of bathymetric

saddle referred to in the text

North tip of Lasuen Knoll.

Structural expression of this

knoll increases to southeast

Increa

 along 

 fau

 is 

Lasuen Knoll

See detail in figure 17

Lasuen Knoll

Lasuen Knoll

Palos Verdes Fault Zone?

Extensional zone

Ridge A

(fig. 14A, B)

Ridge A

(fig. 14A, B)

Ridge A

(fig. 14A, B)

Multiple

Multiple

Multiple

Multiple

Multiple

Multiple

Multip

Multiple

Multiple

Multiple

Multiple

Multiple

Multiple

Ridge B

(fig. 14A, B)

Ridge B

(fig. 14A, B)

No

th

Pa

Unfaulted sediment

covers fault trace

Palos Verdes Fault 

Change in vergence and dip direction

of Palos Verdes Fault Zone. East dip of

this reverse fault becomes more

pronounced to southeast

Channels of

San Gabriel

Canyon

Palos Verdes

Fault Zone

Palos Verdes

Fault Zone

Palos Verdes

Fault Zone

Palos Verdes

Fault Zone

Poorly reflective

rocks Onlap

Onlap

Palos Verde

 Fault Zon

Small normal faults

offset seafloor

Small normal faults

Unconformity truncate

overlying rocks undef

Unconformity truncates di

overlying rocks undeforme

Unconformity truncates dipping beds,

overlying rocks undeformed

Parallel bedding below here

Beds thin westward

Extensional zone

sea-floor truncation

Buried fault

Buried fault

See detail in figure 18

See detail in figure 15

SW 

SW

SW

SW

SW

West

West

West

West

West

?

?

?

Seismic-Reflection Sections Showing Structural Variations along the Palos Verdes F

By

Michael A. Fisher, William R. Normark, Victoria E. Langenheim, Andrew J. Calvert

2004

Shift in alignment of the

Palos Verdes Fault Zone

U.S. DEPARTMENT OF THE INTERIOR

U.S. GEOLOGICAL SURVEY