Late Cretaceous to Pleistocene Silicoflagellates from the Southern Southwest Pacific, DSDP, Leg 29

Perch-Nielsen, K.

doi:10.2973/dsdp.proc.29.115.1975

Cited by 26 publications

(29 citation statements)

References 5 publications

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“…Bukry (1985) noted that skeletons of Dictyocha quadralta Hanna (1928: 261) lack basal pikes and are not evolutionarily related to Cenozoic Dictyocha and placed this taxon in the new genus Arctyocha Bukry (1985: 130). This skeletal morphology had also been observed in the Moreno Shale (Mandra 1960(Mandra , 1968, Deep Sea Drilling Project (DSDP) Leg 29 Site 275 of the Southwest Pacific (Perch-Nielsen, 1975) and the CESAR-6 core from the Arctic Ocean (Ling et al 1973, Bukry 1981, Dell'Agnese & Clark 1994.…”

Section: Initial Studies Of Cretaceous Silicoflagellatesmentioning

confidence: 88%

“…The presence of unusual Arctyocha and Lyramula near the bottom of core 2 at DSDP Site 275 also needs further study. The Initial Scientific Results for that leg include three silicoflagellates studies (Bukry 1975, Hajós & Stradner 1975, Perch-Nielsen 1975 which have different species interpretations. Corbisema geometrica v. apiculata Jousé (1951: 78) of Hajós & Stradner (1975) is equivalent to C. lateradiata (PerchNielsen 1975) and C. geometrica lateradiata (Schulz) Bukry (1975: 853).…”

Section: Discussionmentioning

confidence: 99%

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A review of past and recent research on Cretaceous silicoflagellates

McCartney¹

2013

Phytotaxa

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Previous knowledge of Cretaceous silicoflagellates has come primarily from scattered Maastrichtian or late Campanian localities. Silicoflagellates from the earlier Upper Cretaceous have been observed from the southern shore of the Baltic Sea and eastern slope of the northern Ural Mountains, and Lower Cretaceous from the Weddell Sea near Antarctica are also known. Much of the previous work, including type specimens for genera and species, have been illustrated with few and simple line drawings. Taxonomic distinctions and evolutionary lineages have often been speculative.Recent studies of Santonian and lower Campanian marine sediments from several sites in the northern Canada Arctic Margin and Archipelago substantially increase our knowledge of Cretaceous silicoflagellate morphology, biostratigraphy, and early evolutionary history. This work, which develops from previous diatom studies, provides new information on the enigmatic genera Cornua and Variramus, describes new genera and species, and presents new information on the timing of silicoflagellate evolutionary events. Seven new biostratigraphic zones replace the previously applied single biostratigraphic unit for the Cretaceous.This article reviews recent silicoflagellate discoveries in the context of previous work to provide a current general knowledge of the subject that includes important taxa.

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Section: Initial Studies Of Cretaceous Silicoflagellatesmentioning

confidence: 88%

Section: Discussionmentioning

confidence: 99%

A review of past and recent research on Cretaceous silicoflagellates

McCartney¹

2013

Phytotaxa

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“…As these structures seem to be unknown in any described silicoflagellate genus, Mandra erected the new genus Hannaites, and named the forms in Eocene sediments Hannaites quadria. During Leg 29, this species was recovered in late Eocene sediments at Sites 281 and 283 in the Tasman Sea (Perch-Nielsen, 1975;Bukry, 1975b).…”

Section: Fig 2)mentioning

confidence: 99%

Eocene to Pleistocene Silicoflagellates from the Norwegian-Greenland Sea (DSDP Leg 38)

Martini¹,

Müller²

1976

Initial Reports of the Deep Sea Drilling Project

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“…The biostratigraphy used here is derived from the previously published zonations of Bukry (1981), Perch-Nielsen (1985), and Locker and Martini (1986). Silicoflagellate counts in the oldest cores of Hole 959A and all of Hole 959D are so low that it is difficult to obtain a good biostratigraphic record for the ?lower Oligocene to lowermost upper Oligocene.…”

Section: Biostratigraphymentioning

confidence: 99%

“…Author: Perch-Nielsen, 1975; emended, Bukry, 1978a. Common species: In this zone the common species were C. hastata globulata, C. triacantha triacantha, N. biapiculata, N. constricta, B. apiculata apiculata, D. deflandrei, Naviculopsis biapiculata var.…”

Section: Corbisema Apiculata Zonementioning

confidence: 99%

Oligocene to early Miocene silicoflagellates from the Ivorian Basin, eastern equatorial Atlantic, Site 959

Schellpeper¹,

Watkins²

1998

Proceedings of the Ocean Drilling Program, 159 Scientific Results

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Silicoflagellate biostratigraphy and relative abundance were determined for Site 959 in the eastern equatorial Atlantic. Five silicoflagellate zones, Corbisema apiculata, Naviculopsis biapiculata, Naviculopsis lata, Naviculopsis ponticula, and Corbisema triacantha Zones, were used with the Distephanus speculum hemisphaericus Subzone occurring in the N. biapiculata Zone. The Naviculopsis quadrata Zone is missing between the N. ponticula and N. lata Zones, indicating a hiatus in the lower Miocene cores that corresponds to hiatus NH1. Silicoflagellate relative abundance was graphed as a measure of paleoproductivity for Hole 959A. One large pulse of productivity occurred in the latest early Miocene, right before silica deposition came to an abrupt halt in the earliest middle Miocene. INTRODUCTIONLeg 159 has been one of the few legs of the Ocean Drilling Program to drill the eastern equatorial Atlantic. The objectives of the cruise were to study the evolutionary stages of continental transform margins and investigate deep and intermediate water influences in the eastern equatorial Atlantic throughout the development of the basin. From the Oligocene to the present, Site 959 has been at or near the equator, and therefore, the cores recovered offer an excellent opportunity to study the paleoceanographic history of the eastern equatorial Atlantic and to determine the characteristics of the water masses that were present. In this study, silicoflagellate relative abundance data were collected to define the biostratigraphy for the upper Oligocene to the lower Miocene and investigate the paleoproductivity of the site.Site 959 is located at 3°37.7′N, 2°44.1′W on the Ivory CoastGhana Marginal Ridge south of the Ivorian Basin (Fig. 1). Cores from Site 959 provide a sediment record from the mid-Cretaceous to the present, with silicoflagellates occurring in the Oligocene to lower Miocene. Silicoflagellate preservation and abundance are excellent in the upper Oligocene to uppermost lower Miocene sediment, but downcore in the lower Oligocene, silicoflagellate preservation diminishes. Hole 959A consists of calcareous ooze in the upper 205 m (Sections 159-959A-1H-CC through 22X-CC) underlain by 237 m (Sample 159-959A-23X-1, 39−41 cm, to Sample 159-959A-46X-CC) of interbedded nannofossil ooze and biosiliceous ooze. Twelve samples from the upper portion of Hole 959D (Samples 159-959D-1R-CC through 7R-CC) contain poorly preserved, biogenic siliceous components with sparse nannofossils. Core recovery for this interval of Hole 959D was 16%, which made age designations and identification difficult. Samples downcore from 159-959D-7R-CC consist of diagenetically altered porcellanite and chert and were not examined for silicoflagellates. METHODS AND SAMPLE PREPARATIONSamples were prepared as smear slides on 22 mm × 40 mm cover slips. The number of silicoflagellates was tabulated in 10 transects across the slide, which is equal to an area of 4.92 cm 2 , more than half of the slide area (Tables 1−4). The specimens were counted at 200× m...

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Late Cretaceous to Pleistocene Silicoflagellates from the Southern Southwest Pacific, DSDP, Leg 29

Cited by 26 publications

References 5 publications

A review of past and recent research on Cretaceous silicoflagellates

A review of past and recent research on Cretaceous silicoflagellates

Eocene to Pleistocene Silicoflagellates from the Norwegian-Greenland Sea (DSDP Leg 38)

Oligocene to early Miocene silicoflagellates from the Ivorian Basin, eastern equatorial Atlantic, Site 959

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