Table T2.
Lithologic description of sediments and rocks, including major and minor
modifiers.
>50%,
or dominant components when there is no single >50% component
25%-50%
10%-24%
Biogenic
(pelagic) grains
1.
Ooze
1.
Composition of pelagic grains present in major amounts
1.
Composition of pelagic grains present in minor amounts
2.
Chalk
2.
Texture of siliciclastic grains present in major amounts
2.
Texture of siliciclastic grains present in minor amounts
3.
Pelagic limestone
3.
Composition of all volcaniclasts present in major amounts
3.
Composition of all volcaniclasts present in minor amounts
4.
Radiolarite
5.
Diatomite
6.
Spicule
7.
Porcellanite
8.
Chert
Siliciclastic
grains
1.
Gravel
2.
Sand
3.
Silt
4.
Clay, etc.
Volcaniclastic
grains
1.
Breccia
2.
Lapilli
3.
Ash/tuff
4.
Volcanic, etc.