earth
pdf
keyboard_arrow_up
School
University of Oregon *
*We aren’t endorsed by this school
Course
310
Subject
Geology
Date
Dec 6, 2023
Type
Pages
2
Uploaded by ColonelFlagHummingbird40
1. What is the outermost layer of the Earth called? Do you take this for granted? Do you
feel bad about that after watching the film?
The outermost layer of the Earth is called the crust. the crust is a thin layer with a solid Rocky
shell that forms on the Earth's surface. do I take this for granted personally overall yes but also
just because the Earth is a very delicate Planet and with all the harm that has happened through a
global warming oil mines Etc it's not something I necessarily take for granted but something that
I work on trying to better as the environment and Earth as a whole.
2. How old is the earth, according to this film? Do you buy it?
The Earth is 4.5 billion years old and I definitely do believe we've been on this planet overall for
not even that long compared to how long the planet's been here or any planet in the solar system.
3. Which is older, continental crust or oceanic crust?
The continental crust is older than the Oceanic crust.
4. Where does the energy to drive Plate Tectonics come from?
The energy that drives plate tectonics comes from underneath the Earth's interior. the heat is
generated through radioactive decay in the Earth's mantle as heat from the original Earth's
formation. the heat rises causing the plates to move under the molten lava which moves the
tectonic plates
5. How much extension has occurred in the Basin and Range? How is this relevant to
Oregon and the Pacific Northwest?
The Basin range is about 100 to 200% of the original. and is due to the tectonics moving. The
extension of the tectonics in the basement range has had a significant impact on the
environmental characteristics of Oregon because the process of these large dips in the ground has
caused certain things like The Gorge and these large valleys to develop with the Willamette and
specific Rivers going through them.
6. What is a xenolith? Where do they come from, and how do they get to the surface?
This is a rock form that becomes a larger Rock in its leaders formations. this is a piece of older
rock that's incorporated into a magma chamber during volcanic activity. these fragments are from
the Earth's crust. these come to the Earth's surface when volcanic rock is subsidized and is
exposed to erosion and uplifting and shifts in the tectonic forces that bring it up towards the
surface.
7. What is the underplating of the crust? Why do you think magma rising from the
mantle is likely to pause at the Moho, the boundary between the mantle and the crust?
The underplatting of the crust is the process where magma from the Earth's mantle intrudes the
lower part of the Earth's crust and solidifies which means it creates a new rock formation
underneath the Earth. The mesmerizing from the mantle is because of the density and Cooling
solidification that happens underneath the Earth. this also pauses at the Mojo because The Earth's
magma is rising causing a layer in between the crust and the Earth itself.
8. Where does most of our knowledge of the deep interior of the Earth come from?
The knowledge about the interior Earth comes from sizemyology. which is the study of seismic
waves generated by earthquakes and other sources
9. Erosion reveals granitic batholiths by stripping away the overlying crust. What kind of
crustal rocks were most likely removed from above these batholiths (of the three kinds
of rocks you learned about in the Rock Cycle)?
The rock cycle is divided into igneous sedimentary and metamorphic rocks. the grantic or large
intrusive and bodies formed of cooling solidification of molten magma deep in the earth's crust.
one specific erosion happens and it strips away the overlying crust which the rocks are most
likely removed from the primary base of the sedimentary rock.
10. Where do pillow lavas form? Pay close attention to this process, you can see pillow
lavas in road cuts and quarries throughout western Oregon.
Pillow lavas form underwater volcanic eruptions and are seen on the ocean floor when magma
erupts underwater.
11. How much of Oregon is formed of exotic accreted terranes?
Up to 40% of Oregon is formed of exotic aaccerted terranes.
12. What is the goal of erosion?
The goal of erosion is to transport weathered materials from higher elevations to lower elevations
in the ground
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help