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EESA06H3 (610)
Nick Eyles (539)
Lecture

EESA LEC 8 NOTES

10 Pages
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Department
Environmental Science
Course Code
EESA06H3
Professor
Nick Eyles

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EESA LEC 8 NOTES: GEOLOGIC TIME & STRATIGRAPHY SLIDES
Brief recap of earthquake in Japan (1st page of slides)
Whole of Japan moved east as much as 25m in one go as a result of the
plates that were once locked and resulted in the build up of
accumulated movement/stress and plates moved
The recurrence interval in this part of the plate (should only move 2-
3cm/yer) but suddenly moved a 25m in superquake (recurrence of
superquake =1000yrs of accumulated pressure under plates Japan
went East and the Pacific plate underneath went West)
Stress accumulated in just one part of the subducting pacific plate
margin tokyo is in a dangerous zone because of the imminent threat
of pacific AND Philippines plate
Slide 5: the vertical uplift caused tsunami, tilting up of the ocean floor
and moes the water West towards Japan and to make it worse,
shoreline also depressed, and made the situation more severe.
Describes why the effects of the tsunami were so severe.
*Discussed Final exam info. Lec 8 and onwards and relevant chapters are all
on Plate Tectonics
*Last class = revision session (Apr. 8, 2011)
(2nd page of slides):
Stratigraphy = arranging rocks in a logical sequence in terms of their
age (i.e. if in ancient Japan and wanted to find historic earthquakes,
you would look for the age of sediments and the corresponding age of
record)
Relative aging of the rock is done in field work
Absolute age = can put an actual age/number on the dating of rocks
Geologic timescale just know what it is about and no need to
memorize the names and dates, no need to memorize the geologic
timescale
www.notesolution.com
Slide 3
Alaska cliff is about 1km high
The cliff has been uplifted as a result of the pacific plate going
underneath and this margin has been lifted up
These are moraine rocks good example of plate tectonics
Older strata (=beds) are at the bottom, succession of layers and each
layer may have a distinct fossil type and you can use that type to
correlate what the disposition of ancient geography was
(paleogeography)
Slide 4
This is in eastern Canada and is a deformed rock when Pangea was
coming together (these rocks have been folded b/c Africa was moving
towards North America and collided with the east coast and buckled all
the rocks)
Folded rocks
It was once thought the Earth was created as we see it today, and
ensuing research has made us realize that Earth actually has history
Diluvium = “of a flood was thought to be created by Noahs flood
which was thought to have created the Earths surface (creationist
VIEW OF earth HISTORYthat earth was created in an instant)
Slide 5
Archbishop Ussher : tried to use the bible to get information on the
Earth history (at the time was considered a scientific undertaken)
Counted generations in bible and in 1625, declared the Earth was only
6000 years ago (from 1625)
Slide 6:
Mining evolution all the digging made ppl realize the different
layers/strata and they wondered if these strata were all deposited in
the same flood or was there a complicated history to the creation of the
earth
www.notesolution.com
Georgius Agricola wrote his book in 1556 and was a textbook at the
time for mining geologists (very important textbook at the time)
Fossils seen in the rocks was the preserved remains of ancient
organisms this was discovered in this period
Nicholas Steno his book was translated by former president of the
U.S., Hoover (mining engineer) and his most last monument is the
Hoover Dam (built in 1930s to irrigate the desert) in Las Vegas.
Nicholas quote on slide nailed the logic behind geology.
(3rd page of slides)
Slide 1:
industrial Revolution (not encumbered by biblical references)
period called the Scottish Enlightenment
energy source used at the time was coal which was needed to fuel
steam engines to make products such as steel, cast iron
these production demands required the search and finding of resources
and as a result, ppl at the time began mapping the location of such
resources
canals were built and this excavation of huge areas for the canals
resulted in the learning of earths geography (many layers uncovered)
Who was Joseph Black (Scottish physician and chemist)
James Hutton farmer interested in soil and became interested in the
formation of soil and he is now regarded as the father of modern-day
geology
Adam Smith father / founder of modern-day economics and highly
regarded as free trade and wealth of nations
James Watt his name is used as an index of energy, developed the
steam engine
Sir Walter Scott writer who wrote about Scotland
Slide 2:
www.notesolution.com

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Description
EESA LEC 8 NOTES: GEOLOGIC TIME & STRATIGRAPHY SLIDES Brief recap of earthquake in Japan (1 page of slides) Whole of Japan moved east as much as 25m in one go as a result of the plates that were once locked and resulted in the build up of accumulated movementstress and plates moved The recurrence interval in this part of the plate (should only move 2- 3cmyer) but suddenly moved a 25m in superquake (recurrence of superquake =1000yrs of accumulated pressure under plates Japan went East and the Pacific plate underneath went West) Stress accumulated in just one part of the subducting pacific plate margin tokyo is in a dangerous zone because of the imminent threat of pacific AND Philippines plate Slide 5: the vertical uplift caused tsunami, tilting up of the ocean floor and moes the water West towards Japan and to make it worse, shoreline also depressed, and made the situation more severe. Describes why the effects of the tsunami were so severe. *Discussed Final exam info. Lec 8 and onwards and relevant chapters are all on Plate Tectonics *Last class = revision session (Apr. 8, 2011) (2 page of slides): Stratigraphy = arranging rocks in a logical sequence in terms of their age (i.e. if in ancient Japan and wanted to find historic earthquakes, you would look for the age of sediments and the corresponding age of record) Relative aging of the rock is done in field work Absolute age = can put an actual agenumber on the dating of rocks Geologic timescale just know what it is about and no need to memorize the names and dates, no need to memorize the geologic timescale www.notesolution.com
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