Publication Date:
2024-01-09
Description:
The distribution of 79 foraminiferal species is recorded among 23 samples taken from Cores 123-776A-16R through 123-766A-25R. The benthic species belong to the Ammodiscidae, Ammosphaeroidinidae, Spiroplectamminidae, Verneuilinidae, Tritaxiidae, Globotextulariidae, Eggerellidae, Ichthyolariidae, Nodosariidae, Vaginulinidae, Polymorphinidae, Glandulinidae, Bolivinidae, Turrilinidae, Fursenkoinidae, Pleurostomellidae, Patellinidae, Bagginidae, Quadrimorphinidae, Globorotalitidae, Osangulariidae, and Gavelinellidae families. The planktonic species belong to the Globigerinelloididae, Planomalinidae, Schackoinidae, Hedbergellidae, and Rotaliporidae families.
On the basis of foraminiferal biostratigraphy, the interval from Sections 123-766A-16R-3 through 123-766A-17R-3 has been placed confidently in the uppermost Albian (equivalent of the Rotalipora appenninica Zone of Caron, 1985). Below this, correlations are tentative because of the absence of commonly used zonal index species. The interval from lower Core 123-766A-17R to upper Core 123-766A-18R has been placed in the upper Albian; that from lower Core 123-766A-18R to Core 123-766A-21R has been included in the lower to middle Albian; and Cores 123-766A-24R and 123-766A-25R have been correlated with the upper Aptian.
The fauna is compared to that known from Aptian-Albian deposits in the Australian epeiric basins and at other sites along the western margin of the continent. These deposits were positioned at middle to high paleolatitudes in the Southern Hemisphere. The benthic assemblages from Site 766 belong to the Marssonella Association (of Haig, 1979) and are similar to those recorded elsewhere along the continental margin, but differ from those of the Ammobaculites Association (of Haig, 1979) within the epeiric basins. In overall aspect, the Australian fauna contains few genera not recorded elsewhere, but lacks many families present in Tethyan (low-latitude) faunas. Comparison of late Albian planktonic foraminifers known from along the continental margin indicates that assemblages from Site 766 are similar to those from the Papuan Basin at approximately the same paleolatitude, but are more diverse than those of the Naturaliste Plateau (approximately 10° of paleolatitude south of Site 766), where Rotalipora and Planomalina are absent. This suggests that a significant gradient in surface water temperature existed on the late Albian continental margin between Site 766 and the Naturaliste Plateau.
Keywords:
123-766A; Ammosphaeroidina sp.; Astacolus cf. scitula; Astacolus sp.; Astacolus spp.; Berthelina intermedia; Charltonina cf. australis; Citharina cf. petila; Citharina sp.; Clavihedbergella simplicissima; Clavihedbergella sp.; Coryphostoma sp.; Cuneus cf. ludbrookae; Dorothia sp.; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Ellipsoglandulina sp.; Ellipsoidella cf. cuneata; Eurycheilostoma cf. hergottensis; Frondicularia sp.; Gaudryina aff. richteri; Gavelinella cf. andersoni; Gavelinella cf. indica; Gavelinella sp.; Globigerinelloides aptiense; Globigerinelloides cf. aptiense; Globigerinelloides cf. bentonensis; Globorotalites aptiensis; Globulina prisca; Glomospirella sp.; Grigelis sp.; Hedbergella cf. planispira; Hedbergella cf. punctata; Hedbergella planispira; Hedbergella sp.; Hedbergella trocoidea; Hedbergella yezoana; Hemirobulina hamulus; Hergottella sp.; Heterantyx cf. cretosa; Joides Resolution; Laevidentalina cylindroides; Laevidentalina gracilis; Laevidentalina nana; Laevidentalina oligostegia; Leg123; Lenticulina spp.; Lingulina buddencanyonensis; Lingulina sp.; Lingulonodosaria loryi; Lingulonodosaria nodosaria; Lingulonodosaria sp.; Marssonella oxycona; Ocean Drilling Program; ODP; Osangularia schloenbachi; Planomalina buxtorfi; Planomalina praebuxtorfi; Planularia bradyana; Pleurostomella aff. reussi; Praebulimina cf. nannina; Praeglobotruncana delrioensis; Pseudogaudryinella sp.; Pseudonodosaria humilis; Psilocitharella recta; Pyramidulina obscura; Pyramidulina sceptrum; Pyramidulina sp.; Quadrimorphina allomorphinoides; Ramulina spp.; Remesella sp.; Repmanina corona; Rotalipora appenninica; Rotalipora ticinensis; Sample code/label; Saracenaria spinosa; Saracenaria triangularis; Schackoina cenomana; Scheibnerova protindica; Serovaina gracillima; Serovaina infracretacea; South Indian Ridge, South Indian Ocean; Spiroplectinella cf. gandolfii; Svenia cf. hamiltonensis; Tappanina sp.; Tricarinella excavata; Tritaxia gaultina; Vaginulina sp.; Vaginulinopsis sp.
Type:
Dataset
Format:
text/tab-separated-values, 1978 data points
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