SJVRocks!! CSUBakersfield Department of Geological Sciences

The Bone Bed of Sharktooth

Hill!

SJVRocks!! CSUBakersfield Department of Geological Sciences

Why?

These two shark teeth were found near Hart Park.

Why do you think there are shark teeth buried in the San Joaquin Valley?SJVRocks!! CSUBakersfield Department of

Geological Sciences

Objective:We will create a model that explains the presence of marine fossils in the San Joaquin Valley using the Plate Tectonic Theory to help us understand the change of geography over time.


VocabularyFault: a break along the crust of the earth where one or both sides move

Illustrations by: U.S. Geological Survey (Lead Author);Michael Pidwirny (Topic Editor) "Fault". In: Encyclopedia of Earth. Eds. Cutler J. Cleveland (Washington, D.C.: Environmental Information Coalition, National Council for Science and the Environment). [First published in the Encyclopedia of Earth March 12, 2011; Last revised Date March 13, 2011; Retrieved June 14, 2011 <http://www.eoearth.org/article/Fault>


VocabularyTectonic Plate: Plate: a large, hard slab

of solid rock. Tectonics: comes from the

Greek root "to build."

Putting these two words together, we get the term plate tectonics, which refers to how the Earth's surface is built of plates.

Illustration by http://hamertech.wikispaces.com are licensed under a Creative Commons Attribution Share-Alike 3.0 License.


http://hamertech.wikispaces.com/Plate+Tectonics

VocabularySubduction: the process of the oceanic plate colliding with and moving under a continental plate

Continental Crust

Illustrationby http://geology.com/nsta/

© 2005-2011 Geology.com. All Rights Reserved.SJVRocks!! CSUBakersfield Department of Geological Sciences

VocabularyFossil: form when animals or plants die in the loose sediments (what we commonly call dirt) and are covered by more layers of material

First and last photographs by Teri Madewell. Middle photograph by How Are Fossils Formed? An E-Book About...Fossils, By: Kamryn Herrington & Bryn Towner http://www.valdosta.edu/~klherrington/ebook.html


Vocabulary

Marine: coming from the ocean

Photograph by Brown University (2008, February 23). Resilience Science Is Promising Approach To Marine Conservation. ScienceDaily. Retrieved June 14, 2011, from http://www.sciencedaily.com /releases/2008/02/080217102153.htm


Bakersfield was once under the Pacific

Ocean!!


This place was under the Pacific

Ocean?What

evidence proves we were once under the

ocean?


Fossils of Marine Animals


Fossilization of shark teeth



If you look really hard….

In the hills outside of Bakersfield……

You can find Shark Teeth….

And Other Marine Animal Fossils….



Cow shark tooth

Mako shark tooth

Basking shark tooth

Ray crushing plate



Juvenile Baleen Whale FossilSJVRocks!! CSUBakersfield Department of Geological Sciences

Let’s travel back in time millions of years…


Sharktooth Hill

Central California

14-16 Million Years

Ago


Pliocene 4 mya Pleistocene 0.6 myaLate Miocene 10 mya

Early Miocene 21 myaEarly Eocene 52 myaLate Paleocene 59 mya


Why is Bakersfield in a Valley and no longer under the Pacific Ocean?

The subduction of the oceanic plate beneath the

North American Plate caused the uplift of the Sierra Nevada Mountains. Erosion of sediment

from the Sierra Nevada filled in the San Joaquin Valley and continues to this day.


The Creation of the San Joaquin Valley

59 Million Years Ago52 Million Years Ago45 Million Years Ago30 Million Years Ago21 Million Years Ago10 Million Years Ago 4 Million Years Ago .6 Million Years Ago

Sea Level


Documents

SJVRocks!! CSUBakersfield Department of Geological Sciences