Table T2. Lithologic description of sediments and rocks, including major and minor modifiers.

Sediment class	Principal names	Major modifiers	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.