Table T6. Cretaceous calcareous nannoplankton occurrences in the Medford corehole, Leg 174AXS. (See table notes.)
Depth (ft):
231
241
251
261
271
286
291
301
311
321
331
341
351
361
371
381
386
389
389.95
390
391
392
396
401
401.8
403
404
405
406
411
416
421
431
441
413
416
421
421.2
422.75
423
424.1
425
425.9
Depth (m):
70.4
73.5
76.5
79.6
82.6
87.2
88.7
91.7
94.8
97.8
100.9
103.9
107.0
110.0
113.1
116.1
117.7
118.6
118.9
118.9
119.2
119.5
120.7
122.2
122.5
122.8
123.1
123.4
123.7
125.3
126.8
128.3
131.4
134.4
125.9
126.8
128.3
128.4
128.9
128.9
129.3
129.5
129.8
Nannofossil zone:
?
B
?
?
B
B
B
B
B
B
CC20
CC19
CC19
CC19
CC19
CC19
CC18
CC18
CC18
CC17
CC17
CC17
CC17
CC17
CC17
CC17
CC17
B
B
B
B
B
B
B
CC16
B
B
B
B
CC16
CC16
CC16
B
A. cymbiformis









X


X



























B. parcus CC17/18 X








X



X X X X























B. constrictus CC18a









X



X? X?
X (cf.)























B. expansa X












X



X X X
X X
X















B. hayi CC18/19










































Braarudosphaera sp.










X






























C. aculeus FO CC20 X?
X? X






































C. arcuatus CC21B










































C. obscurus X












X X X
X X X


X X X















C. ovalis










X


X X X
X X





















C. verbeekii FO CC18C

X X?









X



























E. eximus X?












X X X
X X X X
X X








X







E. floralis X?






















Premature






X?







L. cayeuxii X









X

X X X
X X X X
X









X



X? X? X
L. grillii










X













X















M. concava

































X




X

M. furcatus















X X

X

X

X















R. anthophorus X?









































R. levis










































U. sissinghii

X? X?






































U. trifidus X?

X






































W. barnesae X













X






X


















Biscutum sp.


X






































Absence of M. furcatus


X





X X


X?


























Absence of B. parcus


















X X X
X


















Notes: Shaded cells = species relied upon for zonation. FO = first occurrence.