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clear (quartz)
glassy black (obsidian, basalt, volcanic?)
olive green (olivene, volcanic?)
brick red (iron oxide, volcanic?)
white, gray (quartz, granite)
purple (garnet, metamorphic?)
Other…
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very angular
angular
sub-angular
sub-rounded
rounded
well-rounded
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0.25 mm - sand
0.5 mm - sand
1.0 mm - sand
2.0 mm - sand
3.0 mm - gravel
5.0 mm - gravel
7.0 mm - gravel
10 mm - cobbles
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pebble, cobble, boulder
gravel
very coarse sand
coarse sand
medium sand
fine sand
very find sand
silt
clay
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Fast current / strong waves (most mass is 10 mm or larger)
Medium current / medium waves (3 mm to 9 mm)
Slow current / weak waves (less than 3 mm)
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shells or shell-fragments
algae (fresh or salt-water plants)
sticks, plant material (indicative of land-plants)
bones
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Plutonic Origin - Quartz is often clear. Depending on the degree of weathering, granite sand may also include light-colored grains of the mineral feldspar or darker grains of hornblende, mica or magnetite. Where you find quartz sands, there must be some continental rocks somewhere.
Volcanic Origin - Sands of volcanic origin tend to be black, red, or green
Metamorphic Origin – Sands that are of metamorphic origin often have garnet, a purple rock. If you have purple in your sample, it may indicate a history of metamorphosis.
Biogenic - Carbonates react with acid. You will often see shells or other evidence of life
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0% (there is no bubbling) - no reaction (silica based) - terrigenous
less than 50%
more than 50%
100% (all of the material appears to bubble) - small bubbles (carbonate based) - biogenous
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young, resistant rock, and/or of local origin
old, softer rock, and/or of remote origin
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Names
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Location
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Latitude
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Longitude
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Appearance
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Smoothness
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Grain size
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Sand type
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Motion of waves, wind and/or current
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Biogenic components?
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Origin
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Percent biogenic origin - reaction with acid
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Age, Hardness, or Source (Origin relative current location)
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Summary
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