. Bulletins of American paleontology. 56 Bulletin 220 Table Percentages of various foraminiferal groups within core samples from the Heywood Bore >? â ^. AA 2 - - 38 60 1867 AB 4 - 10 37 49 2170 AC 12 - 48 1174 AD 13 16 49 1926 A£ 27 2 28 1115 AT 11 8 33 1761 AO 18 8 47 2076 AH 1 - 53 1426 AI(l) - 7 - 40 53 15 AI(2) 100 - - - - 3 AJ(2) 92 - - 0 - 37 Foraminif era (Table 3). The environment, however, was still probably on the shelf, as shown by the presence of Camerina complanata in this member. Cole (1959, table 1) stated that Op
. Bulletins of American paleontology. 56 Bulletin 220 Table Percentages of various foraminiferal groups within core samples from the Heywood Bore >? â ^. AA 2 - - 38 60 1867 AB 4 - 10 37 49 2170 AC 12 - 48 1174 AD 13 16 49 1926 A£ 27 2 28 1115 AT 11 8 33 1761 AO 18 8 47 2076 AH 1 - 53 1426 AI(l) - 7 - 40 53 15 AI(2) 100 - - - - 3 AJ(2) 92 - - 0 - 37 Foraminif era (Table 3). The environment, however, was still probably on the shelf, as shown by the presence of Camerina complanata in this member. Cole (1959, table 1) stated that Operculum bartschi (=Camerina com- planata; see Cole, 1961, pp. 120-122) occurs commonly in the Recent Philippine and adjacent seas between depths of 19 and 52 fathoms (35- 95 m.), corresponding to a position on the outer continental shelf. Re- duction in the amount of detritus entering the environment, correlated possibly with a more distant shoreline, is expressed in the increased pro- portion of soluble carbonate in the Portland limestone. Polymorphinids have an irregular distribution throughout the Gambier limestone. The ecological implications of this are not apparent. The overall picture is one of a typical marine transgression, beginning in Nelson time, with the sea progressively deepening, and the shoreline shifting away from the area during the time of deposition of the Gambier Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Paleontological Research Institution (Ithaca, N. Y. ); Columbia University. Ithaca, N. Y. , Paleontological Research Institution [etc. ]
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