Transcript science 2010-2011 sediments zehr

Slide 1: Title Page
Slide 2: Table of Contents
Slide 3: A Look at the Precambrian Era
Slide 4: Paleozoic Era
Slide 5: Break down
Slide 6: Mesozoic
Slide 7: Cenozoic
Slide 8: Personal Thoughts
Slide 9: Summary
Slide 10: Works cited
Slide 11:Glossary
A look at the Precambrian Era
 This period was from about 4.6 billion
years until 570 million years ago.
 During this period there were a lot of
stromatolites.
 Also during this period there was Hakatai
Scale and Bass limestone which are
rocks.
Paleozoic Era
 The Tonto group is the lowest group in
the Grand Canyon and has many
complex fossils. As a matter of fact there
have been 47 different species that have
been found and reported.
 Bedding planes also contain burrows and
trace fossils also found in this layer.
Most of these look like traces we may
find in the ocean.
Break down
In the traces and fossils found in the
canyon we are able to distinguish the
difference in the different periods of the
canyon. There have been many fossils
found and then further investigated to
help figure out how old they are and in
what period were they alive.
Mesozoic
 During this period Pangaea broke up
forming land lifts and earth quakes.
 The rocks that were left from all this have
eroded away to nothing, this has stripped
the canyon back to the Permian layers of
rock
Cenozoic
 Fossils with vertebrates are being found
in the lower beds of this layer that are
exposed.
 Earlier deposits are being eroded down
to hard pre-Cenozoic pavements.
 Some of the best mammal producing
beds are considered to be found here.
Personal Thoughts
 I really think that it is a tragedy that some
of the rocks have eroded away and that
we will never be able to completely figure
all this out. However, I do think it is
fascinating that we are able to find all of
the fossils that were mentioned in slide 4.
Summary
 The few rivers that go through the Grand
Canyon have started to erode the rocks
and sediments found in the national park.
This all started about 6 million years ago.
Although some rocks are missing we are
still able to find traces and fossils of
animals. This helps us greatly in the
understanding of the Earth and how it
formed.
Works Cited
http://books.google.com/books?id=4tzWic
5488YC&pg=PA170&lpg=PA170&dq=mes
ozoic+era+in+the+grand+canyon&source
=bl&ots=oxJw4QV4Tg&sig=SNJLZ26Tx0L
HvDxADkN6XmPFUco&hl=en&ei=ykvkTI_
oGoWBlAfEp5nsDg&sa=X&oi=book_resul
t&ct=result&resnum=10&ved=0CDgQ6AE
wCQ#v=onepage&q=mesozoic%20era%2
0in%20the%20grand%20canyon&f=false
http://www.trat.com/Pages/Geological
HistGrandCanyon.html
 Pangaea- earliest known formation of
the earth’s continents.
 Tonto group- consists of 3 Cambrian
period formations, the Tapeats
Sandstone, Bright Angle Shale, and the
Muay limestone.