Table 5. Stratigraphic distribution of radiolarians at Hole 1081A.
Age
Zone
Core,
section,
interval
Depth
(mbsf)
Abundance Preservation Cycladophora davisiana Didymocyrtis tetrathalamus tetrathalamus Eucyrtidium calvertense Lamprocyclas hannai Lamprocyrtis nigriniae Pterocanium praetextum eucolpum Pterocanium trilobum Spongurus pylomaticus Theocorythium trachelium Axoprunum angelinum Eucyrtidium teuscheri Eucyrtidium acuminatum Spongaster tetras tetras Lamprocyrtis neoheteroporos Lamprocyrtis heteroporos Amphirhopalum ypsilon Phormostichoartus corbula Cycladophora pliocenica Cycladophora cornutoides Cycladophora sakaii Phormostichoartus fistula Didymocyrtis avita Stichocorys peregrina Dictyophimus sp. B Didymocyrtis avita/penultima Didymocyrtis penultima Didymocyrtis antepenultima Stichocorys delmontensis Saturnalis circularis Lithopera bacca Lithopera neotera


175-1081A-
Quaternary B. invaginata–C. tuberosa 1H-CC 0.89 A G P P P P P P P P P





















Quaternary B. invaginata–C. tuberosa 2H-CC 8.22 C G P

P P
P + P






















? 3H-CC 20.05 R M


+



























? 4H-CC 29.93 R M






























Pleistocene A. angelinum–A. ypsilon 5H-CC 39.12 A G P P P P + P +

P




















Pleistocene A. angelinum–A. ypsilon 6H-CC 48.52 A G P P P P P P P P
P + P P

















Pleistocene A. angulare 7H-CC 58.03 A G P P P P P P P + P P


P
















Pleistocene A. angulare 8H-CC 67.71 A G P P P P P P P

P


P
















Pleistocene A. angulare 9H-CC 76.72 A G P P P P
P P +
P P
P

















Pleistocene A. angulare 10H-CC 86.31 A G P P P P
P P

P P

P
















Pleistocene A. angulare 11H-CC 96.12 A G P P P P
P P P
P P

P P















Pleistocene A. angulare 12H-CC 105.05 A M P P P P + P P

P P

P P +














Pleistocene A. angulare 13H-CC 114.87 A M P + P P + P P P

P

P + + +













Pliocene P. prismatium 14H-CC 124.50 A M P
P P
P P P
P P +
P P

P












Pliocene P. prismatium 15H-CC 134.77 A G P + P P

P +
+ +

P P +
+












Pliocene P. prismatium 16H-CC 142.51 A G P P P P
P P + + P P

P + P
+












Pliocene P. prismatium 17X-CC 144.45 C G
+ + P
P P +

P

P P + P













Pliocene P. prismatium 18H-CC 154.49 A G P P P P

P P + P P

P P P

+ P










Pliocene P. prismatium 19X-CC 164.17 A G P P + P

P +
+ + P
P P
+
+ P +









Pliocene C. sakaii-S. pylomaticus 20X-CC 172.90 A G
P + P

P P
P P +
P P



P
+








Pliocene C. sakaii-S. pylomaticus 21X-CC 182.38 A G


P

P P +
P +
P P

P
P










Pliocene C. sakaii-S. pylomaticus 22X-CC 193.36 A G
P P P
+
+
+ +


P
P P P P
+








Pliocene C. sakaii-S. pylomaticus 23X-CC 201.81 A G
+ P P
+ P P
P P +
P
P P P P P










Pliocene C. sakaii-S. pylomaticus 24X-CC 209.29 A G
+ P P

P + +
P

P P
P P
P

P







Pliocene C. sakaii-S. pylomaticus 25X-CC 219.80 A M
+ P P

P +

P +
P P P P
+


P







Pliocene C. sakaii-S. pylomaticus 26X-CC 228.28 A M

P P

+ P
+ +

P P
+




P P






Pliocene C. sakaii-S. pylomaticus 27X-CC 240.33 A M

P P

P P
P P


P
P




P







Pliocene C. sakaii-S. pylomaticus 28X-CC 249.87 A G

P P

P P
P P

P P + P




P P






Pliocene C. sakaii-S. pylomaticus 29X-CC 258.72 A M

P P
+ P P
P P


P
P




P
P






? 30X-CC 267.52 B































Pliocene C. sakaii-S. pylomaticus 31X-CC 273.88 A G

P P

+ P
P P


P
+




P
P





Pliocene C. sakaii-S. pylomaticus 32X-CC 289.32 A M
P P P

P P
P P


P






P
P + + P


Pliocene C. sakaii-S. pylomaticus 33X-CC 298.07 A G

P P


P

P


+
+



+ P
P

P


Miocene Unzoned 34X-CC 302.14 A M
+ P P

P

+ +


P






P
P





Miocene Unzoned 35X-CC 312.00 A M

P P




P











P
P





Miocene Unzoned 36X-CC 327.14 A M
P P P




P P


P
+




P







Miocene Unzoned 37X-CC 336.05 A M

+ P

P

P





+




P




+

Miocene Unzoned 38X-CC 341.81 T M






























Miocene Unzoned 39X-CC 356.68 T M































? 40X-CC 357.95 B































Miocene Unzoned 41X-CC 375.23 C M

P P

+

P +










P
+

+


Miocene Unzoned 42X-CC 385.77 A M

P P

+

P











P


P +


Miocene Unzoned 43X-CC 394.91 A M

P P




P +


+





+ P
+





Miocene Unzoned 44X-CC 397.79 A M

P P




P










+ P







Miocene Unzoned 45X-CC 414.69 A M

+ +

P

P









+
P



P


Miocene Unzoned 46X-CC 424.31 A M

P P




P P




+


P
P
+
+ P


Miocene Unzoned 47X-CC 433.70 A M

P +




+
+







+
P

P P P
+ +
Miocene Unzoned 48X-CC 443.49 T M

















+






+



Miocene Unzoned 49X-CC 448.38 C P








P











P







Notes: Occurrence is indicated by P = present and + = one specimen per slide. Abundance: A = abundant; C = common; R = rare; T = trace; and B = barren. Preservation: G = good; M = moderate; and P = poor. B. invaginata = Buccinosphraera invaginata; C. tuberosa = Collosphaera tuberosa; A. angelinum = Axoprunum angelinum; A. ypsilon = Amphirhopalum ypsilon; A. angulare = Anthocyrtidium angulare; C. sakaii = Cycladophora sakii; P. prismatium = Pterocanium prismatium.