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Coconino Community College *
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Course
110
Subject
Geology
Date
Feb 20, 2024
Type
docx
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4
Uploaded by EarlWildcat346
GLG 110 Natural Disasters
Name: ___Ethan Schoolar______
Investigation 4 Earth Materials
Part 1: Rock Samples
Instructions: For the following questions/tasks, use the photos of rock samples in this album: https://photos.app.goo.gl/bG57oQsdW5LijM9j9
1.
Try to identify the numbered samples of the rock types in the table below. (
Don’t look ahead—
the correct answers are shown at the bottom of this page, so you won’t lose points for guessing wrong right now. Just make your best guess.
)
Rock Type
Sample Number (#1-8)
Sandstone
#3
Shale
#7
Conglomerate
#1
Basalt
#5
Granite
#6
2.
(
Check the correct answers at the bottom of the page before answering the rest of these questions.
) Describe how the basalt and the granite look different.
Basalt has a more uniform color while granite has a pattern with 3 different colors.
3.
What is the cause of the difference between granite and basalt?
Granite has a larger amount of silica in it.
4.
What is shale made of?
Shale is made of clay, silt mud, and organic material.
5.
Can you see individual particles in the sandstone?
You can see individual grains with the naked eye.
6.
What are some natural environments you can find sand in today?
Sand can be found on beaches and deserts. [
Answers: conglomerate #1, obsidian #2, sandstone #3, basalt #4, pumice #5, granite #6, limestone #7,
shale - #8
]
7.
How does a sandstone form?
Sandstone if formed when layers of sand is compacted and cemented together. Part 2: GigaPans
The web links for each question will take you to a GigaPan—a super-high resolution image made from as
many of hundreds of individual photos stitched together. Take advantage of the fact that you can zoom in to look closely at each image.
8.
Examine this image: http://gigapan.com/gigapans/200538
(
For a sense of scale, the round dish in these images is around 4 inches across.
)
What do you see? (Be detailed!)
I see many grains of sand varying in color from white tan and black with different sizes and shapes.
9.
Examine these 3 images: http://gigapan.com/gigapans/98840
http://gigapan.com/gigapans/200362
http://gigapan.com/gigapans/200496
a) How are they similar to the image you looked at in question 8?
The three images I just looked at similar to the image in question 8 because they are all pictures of many
grains of different colored sands with the grains having different sizes and shapes.
b) How are they different?
The three images I just looked at different to the image in question 8 because the color of the grains are different than the other and the shape of the grains aren’t as uniform as other images.
c) Suppose the sediment in all four images had been collected from beaches. Think of one explanation for why they look different.
One explanation for why they look different is that the shells in that beach are different then they get crushed down into sand.
10.
Examine these two images: http://gigapan.com/gigapans/183732
http://gigapan.com/gigapans/172285
a) What kinds of sediment do you see?
I think the first one is a sandstone sediment and I think the second one is a shale sediment. b) Look at the information above and below the image on the webpage. Where were these photos taken?
The photos were taken on mars.
11.
Examine this image: http://gigapan.com/gigapans/159529
This sediment was deposited by a glacier in the Canadian Rockies. In the background of the image, you can see the glacier (which has shrunk since the time it deposited that sediment).
Describe the sediment. (Be detailed!)
I think it is a shale sediment because of the grey color and flakey rocks.
12.
Examine this image: http://gigapan.com/gigapans/160713
a) Describe (or sketch) what you see in this vertical cliff face, paying attention to the rock layers.
I see many layers of sandstone. Some have darker shades and different sizes depending on what happened during its formation. It also has a large shift in the middle moving horizontally. b) What type of fault is this?
I believe this is a normal fault.
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13.
Examine this image: http://gigapan.com/gigapans/162993
a) Describe (or sketch) what you see, paying attention to the rock layers.
I see a cliff side with vertical layers on the outside of the image then they turn upwards to make vertical layers.
b) What is it called when rock layers take this shape?
Its called folding when sedimentary layers bend like in the image.
c) Is this an example of brittle deformation or ductile deformation?
Its and example of ductile deformation because of the bends.