Table 5. Stratigraphic distribution of radiolarians at Hole 1075A.
Age
Zone
Core, section,
interval (cm)
Depth
(mbsf)
Abundance Preservation Acanthodesmia viniculata Cycladophora cornutoides Cycladophora davisiana Didymocyrtis tetrathalamus tetrathalamus Eucyrtidium anomalum Lamprocyclas hannai Lamprocyrtis nigriniae Phormostichoartus corbula Pterocanium praetextum eucolpum Pterocanium trilobum Spongaster tetras tetras Theocorythium trachelium trachelium Eucyrtidium calvertense Lamprocyrtis neoheteroporos Amphirhopalum ypsilon Pterocanium praetextum praetextum Axoprunum angelinum Lithopera (Lithopera) bacca Lamprocyrtis heteroporos


175-1075A-





















Pleistocene B. invaginata-C. tuberosa 1H-CC, 49-52 1.47 A G P P P P P P P P P P P P






Pleistocene B. invaginata-C. tuberosa 2H-CC, 11-15 11.23 A G
P P P P P P P P P
P + +




Pleistocene B. invaginata-C. tuberosa 3H-CC, 16-20 20.91 A G P P + P P P
P P P P P P
P P


Pleistocene B. invaginata-C. tuberosa 4H-CC, 19-24 30.29 A G P P P P
P
P P P
P +
P



Pleistocene B. invaginata-C. tuberosa 5H-CC, 16-21 39.95 A G P P P P P P P P P P P


P P


Pleistocene A. angelinum-A. ypsilon 6H-CC, 20-25 49.45 A G
P P P P P P P P P P P

P
P P
Pleistocene A. angelinum-A. ypsilon 7H-CC, 15-19 59.05 A G P P P P P P P P P P P
+


P

Pleistocene A. angelinum-A. ypsilon 8H-CC, 22-27 68.75 A G
P P P
P P
P P P
P


P

Pleistocene A. angelinum-A. ypsilon 9H-CC, 26-31 78.27 A G P P P P
P

P P P




P

Pleistocene A. angelinum-A. ypsilon 10H-CC, 26-31 87.84 A G P P P P
P P P P P P
+
P
P P
Pleistocene A. angelinum-A. ypsilon 11H-CC, 34-40 97.12 A G P P P P
P P P P P P




P

Pleistocene A. angelinum-A. ypsilon 12H-CC, 28-33 106.84 A G P P P P P P

P P P




P

Pleistocene A. angulare 13H-CC, 18-23 116.19 A G
P P P
P
P P P P

+

P

Pleistocene A. angulare 14H-CC, 29-34 125.69 A G
P P P
P
P P P

P +

P

Pleistocene A. angulare 15H-CC, 33-38 135.21 A G P P P P P P


P
P + P P
P
P
Pleistocene A. angulare 16H-CC, 19-24 144.49 A G P P P P P P
P P P P

P P
P
+
Pleistocene A. angulare 17H-CC, 24-29 154.20 A G P P P P P P
P
P


P

P
P
Pleistocene A. angulare 18H-CC, 15-20 163.68 A G P P P P
P
P P P


P

P
+
late Pliocene Phi 19H-CC, 25-30 173.17 A G
P P P
P
P P P

P P

P
+
late Pliocene Phi 20H-CC, 19-24 183.16 A G
P P P
P P P P P

P P P
P
P
late Pliocene Phi 21H-CC, 21-26 192.12 A G
P P P
P
P P P P
P P P
P

late Pliocene Phi 22H-CC, 19-24 201.59 A G
P P P P P
P
P P
P P P
P
P

Notes: Abundance is indicated by A = abundant; P = present; and + = one specimen per slide. Preservation is indicated by G = good. Phi refers to the Pliocene Phi Zone of Hays (1965). B. invaginata = Buccinosphaera invaginata; C. tuberosa = Collosphaera tuberosa; A. angelinum = Axoprunum angelinum; A. ypsilon = Amphirhopalum ypsilon; and A. angulare = Anthocyrtidium angulare.