Table T1. Outline of the granular sediment classification scheme of Mazzullo et at. (1987) as modified for the sediments found during Leg 181.			
			
Sediment class	Major modifier	Principal name	Minor modifier
			
			
Pelagic sediment	1. Composition of pelagic	1. Ooze	1. Composition of pelagic
	grains present in major	2. Chalk	grains present in minor
	amounts.	3. Limestone	amounts.
		4. Radiolarite	
	2. Size and shape of clastic	5. Diatomite	2. Size and shape of clastic
	grains present in major	6. Spiculite	grains present in minor amounts.
	amounts.	7. Chert	
			
			
Siliciclastic sediment	1. Composition of all grains	1. Gravel	1. Composition of all grains
	present in major amounts.		present in minor amounts.
		2. Sand	
	2. Grain shape (optional).		
		3. Silt	2. Size and shape and composition 
	3. Sediment color (optional).		of siliciclastic grains present as
		4. Clay	matrix (coarse-grained clastic
			sediments only).
			
			
Volcaniclastic sediment	1. Composition of volcani-    	1. Breccia	1. Composition of all volcani-
	clasts present in major        		clasts present in minor amounts.
	amounts.		
		2. Lapilli	2. Composition of all pelagic
	2. Composition of all pelagic		grains present in minor amounts.
	grains present in major		
	amounts.	3. Tephra	3. Size and shape of siliciclastic 
			grains present in minor amounts.
	3. Size and shape of		
	siliciclastic grains present		
	in major amounts.