Table 1.

Table 1. Range chart for stratigraphically important radiolarian species, Hole 998A.

Subepoch	Nannofossil zone	Radiolarian zone	Core, section, interval (cm)	Depth (mbsf)	Abundance	Preservation	No. of slides examined	Artophormis gracilis	Calocyclas bandyca	Calocyclas turris	Calocycletta (C.) robusta	Carpocanistrum spp.	Cryptocarpium azyx	Cyrtocapsella tetrapera	Dictyoprora mongolfieri	Dictyoprora pirum	Didymocyrtis prismatica	Dorcadospyris ateuchus	Dorcadospyris papilio	Dorcadospyris pseudopapilio	Eucyrtidium diaphanes	Lithocyclia angusta	Lithocyclia aristotelis grp.	Lophocyrtis (C.) pegetrum	Lychnocanoma amphitrite	Lychnocanoma elongata	Theocorys spongoconus	Theocyrtis annosa	Thyrsocyrtis (P.) lochites	Thyrsocyrtis (P.) tetracantha	Thyrsocyrtis (T.) bromia	Thyrsocyrtis (T.) rhizodon	Tristylospyris triceros
			165-998A-
late Oligocene	CN1a	RP22	36X-1, 36-38	330.16	C	MG	11				A	R		-			R	MR	R		R			R		R	R
	CP19b	RP21	37X-1, 33-35	339.73	R	P	6				F	+						R						+		-	+
			38X-1, 36-38	349.36	F	P	3				F	R						R		+				+		-	+
			39X-CC, 27-29	361.64	tr		5
			40X-1, 35-37	368.55	VR	P	3				+	+						+
			41X-5, 37-39	383.77	VR	M	9				+							+
			42X-5, 36-38	393.96	R	MG	2				R	+						R		+				+									+
			43X-1, 36-38	397.56	F	MG	3				F	R						F										+
			44X-3, 31-32	410.11	R	P	3					+
			45X-1, 89-91	417.29	tr		5				R							F
			46X-1, 36-38	426.36	R	M	5				-	R						R		+				+			+						R
			47X-1, 42-44	436.12	tr		5
	CP19a		48X-1, 107-109	446.37	tr		2				-							+										+
			49X-3, 36-38	458.26	B		2
			50X-2, 103-105	467.03	R	P	3				-	+						R						R			+	+
early Oligocene			52X-3, 30-32	487.00	R	M	3	+			-							+						R									+
	CP18		53X-1, 36-38	493.66	R	M	3											+						R									R
			54X-1, 20-22	503.10	R	M	3	+										-		?				R				R					R
			55X-1, 36-38	512.86	R	M	2	+				+																					+
	CP17		56X-3, 33-35	525.43	VR	M	9
			57X-1, 34-36	532.14	R	M	2	R				+												R			+						R
		RP20	58X-3, 34-35	544.74	R	M	3	+				+										+	+	R									R
			59X-5, 34-36	557.44	tr		2																										+
			60X-1, 36-38	561.06	R	M	5																										+
	CP16c		61X-1, 35-37	570.65	tr		2								+
	CP16a-b		62X-1, 36-37	580.26	tr		3
late Eocene			63X-1, 35-37	589.85	VR	P	3								+										F
			64X-1, 3-5	599.13	tr		2
		RP18	65X-1, 57-59	609.27	VF	P	3		F	R			R		R								R		+				R	F	R	R	R
		RP18	67X-1, 4-6	628.04	VF	G	5		+	+					+	+														R	R	+	R

Notes: Radiolarian abundances are shown as C = common, F = few, VF = very few, R = rare, VR = very rare, tr = trace, and B = barren. Radiolarian preservation is shown as G = good, MG = moderately good, M = moderate, and P = poor. Species abundances are shown as A = abundant, F = few, R = rare, + = single specimen, - = searched for but not found, and ? = dubious identification. Hatching indicates uncertainty in placement of zonal boundary. Shaded row indicates barren sample. See text for key to radiolarian zonal codes.