Closeup of an outcrop of Catalina Schist at Stop 11 in the Palos Verdes Hills.
Gene Fritsche describes the rotation of the Santa Monica Mountains with the aid of drawings in the sand at Stop 13 at Crescent Bay in Laguna Beach. Rocks in the cliff to the left are dark gray, fine-grained turbidites of the Monterey Shale.
Tightly folded syncline in the Monterey Shale at Stop 13 at Crescent Bay in Laguna Beach. Syncline formed as a drag fold along the boundary of a thick, Miocene, andesite dike that is shown in the upper left portion of the photograph beginning at a light-colored contact zone, which is enlarged in the following photograph.
Contact between the Monterey Shale in the lower right part of the picture and a thick andesite dike in the upper left part of the picture. Beach cliff exposure is at Stop 13 at Crescent Bay in Laguna Beach. Evidence of rapid cooling or extensive baking are absent, which indicates that the dike was rather shallow and relatively cool when it was intruded.
Peter Weigand discusses the andesite intrusion at Stop 13 at Crescent Bay in Laguna Beach with Syrus Parvizian (left) and Butch Trembly (right). Carl Jacobson explores the andesite in the background.
Lunch at Stop 13 at Crescent Bay in Laguna Beach. Seated left to right with a thick andesite dike as their backrest are Peter Weigand, J.R. Morgan, Pam Irvine, Sally McGill, Marlin Dickey, and Fred Burnett.
Trip participants get a close-up look at the San Onofre Breccia at Stop 15 at Dana Point.
Carl Jacobson describes the finer points of Catalina Schist mineralogy. Most of the clasts in the San Onofre Breccia here at Stop 15 at Dana Point are from the Catalina Schist. The mineral fuchsite was found in the clasts here, and Peter Weigand, Butch Trembly, Syrus Parvizian, Sally McGill, and Marlin Dicky are hoping to learn how to recognize it.
Field trip participants study the Cristianitos fault contact at Stop 16 at San Onofre State Beach. Contact is between the less resistant upper Miocene Monterey Formation in the footwall and the more resistant upper Miocene to lower Pliocene San Mateo Formation in the hanging wall.
Synthetic (lower left to upper right) and antithetic (upper left to lower right) conjugate shears in the hanging wall block of the upper Miocene to lower Pliocene San Mateo Formation just above the Cristianitos fault at Stop 16 at San Onofre State Beach. These shears demonstrate the extensional, normal-slip nature of the Cristianitos fault.
Gene Fritsche describes the rotation of the Santa Monica Mountains with the aid of drawings in the sand at Stop 13 at Crescent Bay in Laguna Beach. Rocks in the cliff to the left are dark gray, fine-grained turbidites of the Monterey Shale.
Tightly folded syncline in the Monterey Shale at Stop 13 at Crescent Bay in Laguna Beach. Syncline formed as a drag fold along the boundary of a thick, Miocene, andesite dike that is shown in the upper left portion of the photograph beginning at a light-colored contact zone, which is enlarged in the following photograph.
Contact between the Monterey Shale in the lower right part of the picture and a thick andesite dike in the upper left part of the picture. Beach cliff exposure is at Stop 13 at Crescent Bay in Laguna Beach. Evidence of rapid cooling or extensive baking are absent, which indicates that the dike was rather shallow and relatively cool when it was intruded.
Peter Weigand discusses the andesite intrusion at Stop 13 at Crescent Bay in Laguna Beach with Syrus Parvizian (left) and Butch Trembly (right). Carl Jacobson explores the andesite in the background.
Lunch at Stop 13 at Crescent Bay in Laguna Beach. Seated left to right with a thick andesite dike as their backrest are Peter Weigand, J.R. Morgan, Pam Irvine, Sally McGill, Marlin Dickey, and Fred Burnett.
Trip participants get a close-up look at the San Onofre Breccia at Stop 15 at Dana Point.
Carl Jacobson describes the finer points of Catalina Schist mineralogy. Most of the clasts in the San Onofre Breccia here at Stop 15 at Dana Point are from the Catalina Schist. The mineral fuchsite was found in the clasts here, and Peter Weigand, Butch Trembly, Syrus Parvizian, Sally McGill, and Marlin Dicky are hoping to learn how to recognize it.
Field trip participants study the Cristianitos fault contact at Stop 16 at San Onofre State Beach. Contact is between the less resistant upper Miocene Monterey Formation in the footwall and the more resistant upper Miocene to lower Pliocene San Mateo Formation in the hanging wall.
Synthetic (lower left to upper right) and antithetic (upper left to lower right) conjugate shears in the hanging wall block of the upper Miocene to lower Pliocene San Mateo Formation just above the Cristianitos fault at Stop 16 at San Onofre State Beach. These shears demonstrate the extensional, normal-slip nature of the Cristianitos fault.
Tightly folded syncline in the Monterey Shale at Stop 13 at Crescent Bay in Laguna Beach. Syncline formed as a drag fold along the boundary of a thick, Miocene, andesite dike that is shown in the upper left portion of the photograph beginning at a light-colored contact zone, which is enlarged in the following photograph.
Contact between the Monterey Shale in the lower right part of the picture and a thick andesite dike in the upper left part of the picture. Beach cliff exposure is at Stop 13 at Crescent Bay in Laguna Beach. Evidence of rapid cooling or extensive baking are absent, which indicates that the dike was rather shallow and relatively cool when it was intruded.
Peter Weigand discusses the andesite intrusion at Stop 13 at Crescent Bay in Laguna Beach with Syrus Parvizian (left) and Butch Trembly (right). Carl Jacobson explores the andesite in the background.
Lunch at Stop 13 at Crescent Bay in Laguna Beach. Seated left to right with a thick andesite dike as their backrest are Peter Weigand, J.R. Morgan, Pam Irvine, Sally McGill, Marlin Dickey, and Fred Burnett.
Trip participants get a close-up look at the San Onofre Breccia at Stop 15 at Dana Point.
Carl Jacobson describes the finer points of Catalina Schist mineralogy. Most of the clasts in the San Onofre Breccia here at Stop 15 at Dana Point are from the Catalina Schist. The mineral fuchsite was found in the clasts here, and Peter Weigand, Butch Trembly, Syrus Parvizian, Sally McGill, and Marlin Dicky are hoping to learn how to recognize it.
Field trip participants study the Cristianitos fault contact at Stop 16 at San Onofre State Beach. Contact is between the less resistant upper Miocene Monterey Formation in the footwall and the more resistant upper Miocene to lower Pliocene San Mateo Formation in the hanging wall.
Synthetic (lower left to upper right) and antithetic (upper left to lower right) conjugate shears in the hanging wall block of the upper Miocene to lower Pliocene San Mateo Formation just above the Cristianitos fault at Stop 16 at San Onofre State Beach. These shears demonstrate the extensional, normal-slip nature of the Cristianitos fault.
Contact between the Monterey Shale in the lower right part of the picture and a thick andesite dike in the upper left part of the picture. Beach cliff exposure is at Stop 13 at Crescent Bay in Laguna Beach. Evidence of rapid cooling or extensive baking are absent, which indicates that the dike was rather shallow and relatively cool when it was intruded.
Peter Weigand discusses the andesite intrusion at Stop 13 at Crescent Bay in Laguna Beach with Syrus Parvizian (left) and Butch Trembly (right). Carl Jacobson explores the andesite in the background.
Lunch at Stop 13 at Crescent Bay in Laguna Beach. Seated left to right with a thick andesite dike as their backrest are Peter Weigand, J.R. Morgan, Pam Irvine, Sally McGill, Marlin Dickey, and Fred Burnett.
Trip participants get a close-up look at the San Onofre Breccia at Stop 15 at Dana Point.
Carl Jacobson describes the finer points of Catalina Schist mineralogy. Most of the clasts in the San Onofre Breccia here at Stop 15 at Dana Point are from the Catalina Schist. The mineral fuchsite was found in the clasts here, and Peter Weigand, Butch Trembly, Syrus Parvizian, Sally McGill, and Marlin Dicky are hoping to learn how to recognize it.
Field trip participants study the Cristianitos fault contact at Stop 16 at San Onofre State Beach. Contact is between the less resistant upper Miocene Monterey Formation in the footwall and the more resistant upper Miocene to lower Pliocene San Mateo Formation in the hanging wall.
Synthetic (lower left to upper right) and antithetic (upper left to lower right) conjugate shears in the hanging wall block of the upper Miocene to lower Pliocene San Mateo Formation just above the Cristianitos fault at Stop 16 at San Onofre State Beach. These shears demonstrate the extensional, normal-slip nature of the Cristianitos fault.
Peter Weigand discusses the andesite intrusion at Stop 13 at Crescent Bay in Laguna Beach with Syrus Parvizian (left) and Butch Trembly (right). Carl Jacobson explores the andesite in the background.
Lunch at Stop 13 at Crescent Bay in Laguna Beach. Seated left to right with a thick andesite dike as their backrest are Peter Weigand, J.R. Morgan, Pam Irvine, Sally McGill, Marlin Dickey, and Fred Burnett.
Trip participants get a close-up look at the San Onofre Breccia at Stop 15 at Dana Point.
Carl Jacobson describes the finer points of Catalina Schist mineralogy. Most of the clasts in the San Onofre Breccia here at Stop 15 at Dana Point are from the Catalina Schist. The mineral fuchsite was found in the clasts here, and Peter Weigand, Butch Trembly, Syrus Parvizian, Sally McGill, and Marlin Dicky are hoping to learn how to recognize it.
Field trip participants study the Cristianitos fault contact at Stop 16 at San Onofre State Beach. Contact is between the less resistant upper Miocene Monterey Formation in the footwall and the more resistant upper Miocene to lower Pliocene San Mateo Formation in the hanging wall.
Synthetic (lower left to upper right) and antithetic (upper left to lower right) conjugate shears in the hanging wall block of the upper Miocene to lower Pliocene San Mateo Formation just above the Cristianitos fault at Stop 16 at San Onofre State Beach. These shears demonstrate the extensional, normal-slip nature of the Cristianitos fault.
Lunch at Stop 13 at Crescent Bay in Laguna Beach. Seated left to right with a thick andesite dike as their backrest are Peter Weigand, J.R. Morgan, Pam Irvine, Sally McGill, Marlin Dickey, and Fred Burnett.
Trip participants get a close-up look at the San Onofre Breccia at Stop 15 at Dana Point.
Carl Jacobson describes the finer points of Catalina Schist mineralogy. Most of the clasts in the San Onofre Breccia here at Stop 15 at Dana Point are from the Catalina Schist. The mineral fuchsite was found in the clasts here, and Peter Weigand, Butch Trembly, Syrus Parvizian, Sally McGill, and Marlin Dicky are hoping to learn how to recognize it.
Field trip participants study the Cristianitos fault contact at Stop 16 at San Onofre State Beach. Contact is between the less resistant upper Miocene Monterey Formation in the footwall and the more resistant upper Miocene to lower Pliocene San Mateo Formation in the hanging wall.
Synthetic (lower left to upper right) and antithetic (upper left to lower right) conjugate shears in the hanging wall block of the upper Miocene to lower Pliocene San Mateo Formation just above the Cristianitos fault at Stop 16 at San Onofre State Beach. These shears demonstrate the extensional, normal-slip nature of the Cristianitos fault.
Trip participants get a close-up look at the San Onofre Breccia at Stop 15 at Dana Point.
Carl Jacobson describes the finer points of Catalina Schist mineralogy. Most of the clasts in the San Onofre Breccia here at Stop 15 at Dana Point are from the Catalina Schist. The mineral fuchsite was found in the clasts here, and Peter Weigand, Butch Trembly, Syrus Parvizian, Sally McGill, and Marlin Dicky are hoping to learn how to recognize it.
Field trip participants study the Cristianitos fault contact at Stop 16 at San Onofre State Beach. Contact is between the less resistant upper Miocene Monterey Formation in the footwall and the more resistant upper Miocene to lower Pliocene San Mateo Formation in the hanging wall.
Synthetic (lower left to upper right) and antithetic (upper left to lower right) conjugate shears in the hanging wall block of the upper Miocene to lower Pliocene San Mateo Formation just above the Cristianitos fault at Stop 16 at San Onofre State Beach. These shears demonstrate the extensional, normal-slip nature of the Cristianitos fault.
Carl Jacobson describes the finer points of Catalina Schist mineralogy. Most of the clasts in the San Onofre Breccia here at Stop 15 at Dana Point are from the Catalina Schist. The mineral fuchsite was found in the clasts here, and Peter Weigand, Butch Trembly, Syrus Parvizian, Sally McGill, and Marlin Dicky are hoping to learn how to recognize it.
Field trip participants study the Cristianitos fault contact at Stop 16 at San Onofre State Beach. Contact is between the less resistant upper Miocene Monterey Formation in the footwall and the more resistant upper Miocene to lower Pliocene San Mateo Formation in the hanging wall.
Synthetic (lower left to upper right) and antithetic (upper left to lower right) conjugate shears in the hanging wall block of the upper Miocene to lower Pliocene San Mateo Formation just above the Cristianitos fault at Stop 16 at San Onofre State Beach. These shears demonstrate the extensional, normal-slip nature of the Cristianitos fault.
Field trip participants study the Cristianitos fault contact at Stop 16 at San Onofre State Beach. Contact is between the less resistant upper Miocene Monterey Formation in the footwall and the more resistant upper Miocene to lower Pliocene San Mateo Formation in the hanging wall.
Synthetic (lower left to upper right) and antithetic (upper left to lower right) conjugate shears in the hanging wall block of the upper Miocene to lower Pliocene San Mateo Formation just above the Cristianitos fault at Stop 16 at San Onofre State Beach. These shears demonstrate the extensional, normal-slip nature of the Cristianitos fault.