Post on 17-Dec-2015
transcript
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.
SJVRocks!! CSUBakersfield Department of Geological Sciences
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>
SJVRocks!! CSUBakersfield Department of Geological Sciences
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.
SJVRocks!! CSUBakersfield Department of Geological Sciences
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
SJVRocks!! CSUBakersfield Department of Geological Sciences
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
SJVRocks!! CSUBakersfield Department of Geological Sciences
Bakersfield was once under the Pacific
Ocean!!
SJVRocks!! CSUBakersfield Department of Geological Sciences
This place was under the Pacific
Ocean?What
evidence proves we were once under the
ocean?
SJVRocks!! CSUBakersfield Department of Geological Sciences
Fossils of Marine Animals
SJVRocks!! CSUBakersfield Department of Geological Sciences
Fossilization of shark teeth
SJVRocks!! CSUBakersfield Department of Geological Sciences
Fossils of Marine Animals
If you look really hard….
In the hills outside of Bakersfield……
You can find Shark Teeth….
And Other Marine Animal Fossils….
SJVRocks!! CSUBakersfield Department of Geological Sciences
Fossils of Marine Animals
Cow shark tooth
Mako shark tooth
Basking shark tooth
Ray crushing plate
SJVRocks!! CSUBakersfield Department of Geological Sciences
Fossils of Marine Animals
Juvenile Baleen Whale FossilSJVRocks!! CSUBakersfield Department of Geological Sciences
Let’s travel back in time millions of years…
SJVRocks!! CSUBakersfield Department of Geological Sciences
Sharktooth Hill
Central California
14-16 Million Years
Ago
SJVRocks!! CSUBakersfield Department of Geological Sciences
Pliocene 4 mya Pleistocene 0.6 myaLate Miocene 10 mya
Early Miocene 21 myaEarly Eocene 52 myaLate Paleocene 59 mya
SJVRocks!! CSUBakersfield Department of Geological Sciences
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.
SJVRocks!! CSUBakersfield Department of Geological Sciences
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
SJVRocks!! CSUBakersfield Department of Geological Sciences