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Observe Sand Samples

Day 15

Summer Roland

on 29 May 2014

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Transcript of Observe Sand Samples

Day 15 - Observe Sand Samples
Describe the processes that cause rocks to change from one form to another.
Any type of rock can melt and then cool to form an igneous rock. Any type of rock can weather, erode, move, and settle to form sediments, which can get compacted and cemented together to form a sedimentary rock. Any type of rock can be changed by heat, pressure or both heat and pressure to form a metamorphic rock.
What does compacted mean?

What does cemented mean?

What causes the pressure on a rock beneath Earth's surface?

Compacted means to get squeezed or pressed together so it takes up less space.
Cemented means to get stuck together.
The weight of all the rock above it causes pressure on rocks beneath Earth's surface.
Is all sand the same?
I have some sand samples that have been collected from different locations.
- One sample was collected at a beach.
- One sample was collected along a stream high in the mountains.
- One sample was collected from a sand dune in the western U.S.
Your job is to look at the sand samples and identify which sample came from the locations listed above.
Carefully compare the sand samples and make sure your drawings and notes reflect exactly what you see.
Mountain Stream
Sand Dune
Desert Wash
- Sample 4 has no information on it. It is a mystery that I would like you to help with.
Extra Practice:
Subangular to subrounded
Poorly sorted to moderately well sorted
Medium to coarse
Variety of colors and minerals
Rounded to well-rounded
Well sorted to very well sorted
Fine to medium
Variety of colors and minerals.
subrounded to rounded, some subangular
well sorted to very well sorted
Fine to medium
Mostly quartz, clear minerals
Frosted and gouged
Angular to subangular
Moderately sorted to poorly sorted
Fine to medium
Mostly quartz, clear minerals
It did not travel very far because it is angular and the variety of
A stream channel that was very near the source of weathering.
minerals and it is poorly sorted so not much time to sort.
It traveled a long distance.
Due to the shape, sorting, and composition it would suggest
that it was transported by water.
a sand dune.
The sand was windblown creating scratches and was deposited in
Amanda -
Well rounded
Mostly clear quartz
Jamica's - Shape:
Well Sorted
angular to subangular
poorly sorted
Medium to coarse
Grain Size:
Grain Size:
Mixture of sizes
Dark colors because of volcano
Ricky's -
Subangular to rounded
Well Sorted
Grain Size:
Frosted, Pitted, Gouged, Scratched; Mostly quartz
Fine-grained to medium
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