Table 3. Stratigraphic distribution of radiolarians at Hole 1080A.
Age
Zone
Core, section, interval
Depth (mbsf)
Abundance Preservation Cycladophora cornutoides Cycladophora davisiana Eucyrtidium acuminatum Lamprocyclas hannai Lamprocyrtis nigriniae Theocorythium trachelium trachelium Axoprunum angelinum Didymocyrtis tetrathalamus tetrathalamus Eucyrtidium calvertense Eucyrtidium teuscheri teuscheri Pterocanium praetextum eucolpum Pterocanium trilobum Saturnalis circularis Spongaster tetras tetras Lamprocyrtis heteroporos Lamprocyrtis neoheteroporos Amphirhopalum ypsilon


175-1080A-
Quaternary B. invaginata–C. tuberosa 1H-CC 3.25 C G + P + P + P










Pleistocene A. angelinum–A. ypsilon 2H-CC 13.15 C G
P + P

P P + + P + +



Pleistocene A. angelinum–A. ypsilon 3H-CC 23.13 F G
P
+

P +



+ +


Pleistocene A. angelinum–A. ypsilon 4H-CC 34.07 C G
P + P

P P P + P
P



Pleistocene A. angulare? 5H-CC 42.50 A G
P + P

P P P + P P +
P P
Pleistocene A. angulare? 6H-CC 51.27 C G
P
P

P P P

P P
+ P P

Notes: Occurrence is indicated by P = present and + = one specimen per slide. Abundance: C = common; F = few; and A = abundant. Preservation: G = good. B. invaginata = Bucciuo-sphaera invaginata; C. tuberosa = Collosphaera tuberosa; A. angelinum = Axoprunum angelinum; A. ypsilon = Amphirhopalum ypsilon; A. angulare = Authocyrtidium angulare.