SUMMARY

Fourteen Bolboforma zones/subzones were identified at the Hatton-Rockall Basin spanning the interval from early Miocene to late Pliocene. Age determinations for the different Bolboforma zones are given. Bolboforma assemblages show good potential for Neogene biostratigraphy, whereas only six zones of planktonic foraminifers and nine zones of calcareous nannoplankton were determined during the above-mentioned time span at the Hatton-Rockall Basin. The genus Bolboforma, although containing fossils of uncertain origin, is therefore the best calcareous microfossil group for Neogene biostratigraphy in the North Atlantic.

Continuous redeposition of middle Miocene Bolboforma species from the Rockall Bank into the Hatton-Rockall Basin is documented during the latest middle Miocene and late Miocene sediment. Extensive redeposition is observed on the top of a turbidite in the uppermost upper Miocene sequence.

TAXONOMIC NOTES

Faunal Reference List

Type references are given for each species recognized.
B. alata Spiegler, in press b, pl. 1, figs. 9, 10.
B. aculeata von Daniels and Spiegler, 1974, p. 65, pl. 8, figs. 1-3.
B. atlantica Spiegler, see Spiegler and von Daniels, 1991, p. 133, pl. 10, figs. 1-5.
B. badenensis Szczechura, 1982, p. 33, pl. 6, figs. 1-4.
B. capsula Spiegler, 1987, p. 162, pl. 2, figs. 4-6; pl. 3, figs. 1-4.
B. carina Spiegler, in press b, pl. 2, figs. 17, 18.
B. carinaspinosa Spiegler, in press b, pl. 2, figs. 19-22.
B. clodiusi von Daniels and Spiegler, 1974, p. 63, pl. 7, figs. 4-6.
B. communis Spiegler, in press b, pl. 4, figs. 11, 12.
B. compressispinosa Spiegler, see Spiegler and von Daniels, 1991, p. 134, pl. 2, figs. 5, 6.
B. contorta Spiegler, see Spiegler and Gürs, 1996, p. 160, pl. 6, figs. 3-6.
B. contorta sculpturata Spiegler, in press b, pl. 5, figs. 12, 13.
B. costairregularis costairregularis (Toering and Voorthuysen, 1973), p. 50, pl. 2, figs. 6-9.
B. costairregularis variabilis Spiegler, pl. 2, figs. 14, 15.
B. danielsi Murray, 1984, p. 538, pl. 1, figs. 13-15.
B. deformis Spiegler, in press a, pl. 1, figs. 7-10.
B. elegans Spiegler, in press b, pl. 1, figs. 11-13.
B. fava Spiegler, in press b, pl. 6, fig. 5.
B. fragori Powell, 1986, p. 71, pl. 1, figs. 1-4.
B. furcata Spiegler, see Spiegler and von Daniels, 1991, p. 135, pl. 6, figs. 8-10.
B. gracilireticulata Spiegler, in press b, pl. 5, figs. 14, 15.
B. groenlandica Spezzaferri and Spiegler, 1998, p. 205, pl. 1, figs. 1, 2, 4.
B. hispida Spiegler, in press b, pl. 2, figs. 5-9.
B. intermedia von Daniels and Spiegler, 1974, pp. 66-67, pl. 8, figs. 7-9.
B. laevis von Daniels and Spiegler, 1974, p. 64, pl. 7, figs. 7-9; pl.10, fig. 6.
B. lockeri Spiegler, in press b, pl. 4, figs. 14-16.
B. metzmacheri metzmacheri (Clodius, 1922), p. 108, pl. 1, fig. 2.
B. metzmacheri ornata Spiegler, in press b, pl. 5, figs. 3, 4.
B. metzmacheri solida Spiegler, in press b, pl. 5, figs. 5-7.
B. moravica Redinger, 1992, p. 468, pl. 3, figs. 1-4.
B. mutabilis Spiegler, in press b, pl. 4, figs. 5-7.
B. oblongireticulata Spiegler, in press b, pl. 6, figs. 8, 9.
B. platyreticulata Spiegler, in press b, pl. 6, figs. 6, 7.
B. pentaspinosa Spiegler, see Spiegler and von Daniels, 1991, p. 138, pl. 6, figs. 5-7.
B. pisiformis (Margarel, 1968), p. 60, pl. 9, figs. 8, 9; pl. 35, figs. 1-4.
B. polygonalis Spiegler, in press a, pl. 1, figs. 11-14.
B. praeintermedia Spiegler, in press b, pl. 4, figs. 19, 20.
B. pustulaintermedia Spiegler, in press b, pl. 4, figs. 8-10.
B. reticulata von Daniels and Spiegler, 1974, p. 64, pl. 7, figs. 10, 11.
B. robusta Spiegler, see Spiegler and von Daniels, 1991, p. 139, pl. 9, figs. 1-6.
B. robustabadenensis Spiegler, see Spiegler and Gürs, 1996, p. 156, pl. 5, figs. 7-10.
B. rotunda von Daniels and Spiegler, 1974, p. 67, pl. 8, fig. 10; pl. 9, figs. 1, 2.
B. sphaerica Spiegler, in press b, pl. 3, figs. 14-17.
B. spinosa von Daniels and Spiegler, 1974, pp. 67-68, pl. 9, figs. 3, 4.
B. spiralis von Daniels and Spiegler, 1974, p. 68, pl. 9, figs. 5-8; pl. 10, figs. 1-3.
B. stella Spiegler, in press b, pl. 2, figs. 1-4.
B. subfragoris Spiegler, see Spiegler and von Daniels, 1991, p. 140, pl. 11, figs. 3-6.
B. subfragoris magna Spiegler, in press b, pl. 6, figs. 3, 4.
B. superba Spiegler, in press b, pl. 5, figs. 17-19.
B. tenuis Spiegler, in press b, pl. 3, figs. 7-10.
B. trochospiralis Spiegler, in press b, pl. 4, figs. 17, 18.
B. verrucosa Spiegler, in press b, pl. 6, figs. 1, 2.
B. vulgaris Spiegler, in press b, pl. 6, figs. 14, 15.

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