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Detrital
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Grain
|
Check:
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Size
(mm)
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Grain
Name
|
Description
|
|
__
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2 or
larger
|
Gravel
|
__ Grains
rounded
|
|
__ Grains
angular
|
|
__
|
1/16 to
2
|
Sand
|
Like sandpaper
|
|
__
|
1/256 -
1/16
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Silt
|
Feels gritty, grains
barely detectable
|
|
__
|
less than
1/256
|
Clay
|
__ Grains detected only
with magnifier.
__ No grains
detected.
|
|
If clay or
silt, then: __ Layered; __ Not
layered
|
|
|
|
Date collected,
locality of origin
(attach a description,
sketch,
or photograph of surroundings)
|
|
Classification
__ Detrital (clastic)
__ Organic
__ Inorganic chemical
|
|
Reacts with HCl?
__ yes; __ no
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|
Color:
|
|