The Tertiary of Australia: Foraminiferal overview

McGowran, Brian

doi:10.1016/0377-8398(79)90019-7

Cited by 91 publications

(45 citation statements)

References 63 publications

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“…However, it is Site 762 (this paper) Figure 9. Comparison of duration of hiatuses (diagonal lines) in Australian continental margin sedimentary sequences (McGowran, 1979;Quilty, 1980;Steele, 1976;Golovchenko et al, this chapter) with ages of unconformities separating eustatic sea-level supercycles (Haq et al, 1987). After Loutit and Kennett, 1981. interesting to note that these large-scale cycles have boundaries that coincide with the Cenomanian/Turonian and Cretaceous/Tertiary boundaries.…”

Section: Low-frequency Eventsmentioning

confidence: 98%

Sedimentary Cycles on the Exmouth Plateau

Golovchenko¹,

Borella²,

O'Connell³

1992

Proceedings of the Ocean Drilling Program

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Sedimentary cycles are observed in the nearly complete Lower Cretaceous to Eocene pelagic carbonates at Site 762 on the Exmouth Plateau off northwest Australia. The high-frequency cycles of variable clay and foraminifers in nannofossil chalk appear as color cycles repeating on a scale of centimeters to meters in thickness. Measured cycle thickness indicate that the dominant cycles appear to be related to the precession and obliquity periods.To evaluate the high-frequency variance observed on the gamma-ray curve, spectral analysis of the log was performed on two intervals: 260 to 365 mbsf in the Cenozoic, and 555 to 685 mbsf in the Mesozoic. Average Cenozoic sedimentation rates of 10.5 m/m.y. are high enough to show that variance is present in the full suite of eccentricity bands (413-123-95 k.y.).

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Section: Low-frequency Eventsmentioning

confidence: 98%

Sedimentary Cycles on the Exmouth Plateau

Golovchenko¹,

Borella²,

O'Connell³

1992

Proceedings of the Ocean Drilling Program

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“…The top of the lower Eocene sequence is an erosional surface that can be traced from the coastal plain outcrops (Ward and Strickland, 1985) to the lower continental rise, and is reported widely outside the western North Atlantic as well (Steele, 1976;McGowran, 1979;Quilty, 1980;Barr and Berggren, 1981;Loutit and Kennett, 1981;Berggren and Aubert, 1983;Aubry, 1985). At Site 612 the erosional contact (hiatus of <2 m.y.)…”

Section: Early Eocene (Sequence 9) Depositional Historymentioning

confidence: 99%

“…(612) 3 and 4. The location of the New Jersey Transect drill sites within a grid of single-channel and multichannel seismic reflection profiles, coupled with downhole logging and detailed lithostratigraphic and biostratigraphic studies, has shown that the principal depositional sequences and unconformities can be traced over most of the continental slope and rise and are correlative with those of the adjacent shelf and other nearby shelf basins (Poag, 1982;and Schlee, 1984;Poag, 1985a;Popenoe, 1985), of the coastal plain (Owens and Gohn, 1985;Ward and Strickland, 1985;Poag and Ward, in press), and of the margins of several other continents (Steele, 1976;McGowran, 1979;Quilty, 1980;Barr and Berggren, 1981;Loutit and Kennett, 1981;Zeigler, 1982;von Rad and Exon, 1982;Riggs, 1984;Schlee, 1984;Seiglie and Baker, 1984;Seiglie and Moussa, 1984;Aubry, 1985;.…”

Section: Summary Of Principal Objectives Achievedmentioning

confidence: 99%

The New Jersey Transect: Stratigraphic Framework and Depositional History of a Sediment-Rich Passive Margin

Poag¹

1987

Initial Reports of the Deep Sea Drilling Project

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The results from Leg 95 of the Deep Sea Drilling Project bring to completion a series of geological and geophysical studies along a 700-km transect of the New Jersey continental margin. Integration of outcrop, borehole, and seismic reflection data along this transect has revealed the regional stratigraphic framework and has allowed a comprehensive interpretation of the depositional history of the Baltimore Canyon Trough and the adjacent North American Basin. The depositional sequences documented at the boreholes are extrapolated along the grid of seismic profiles to produce isopach maps.Analyses of these data show that sediment dispersal on the New Jersey margin has been governed in large part by sea-level changes, but modified by temporal changes in shelf-edge physiography, sediment sources, and deposition rates. Notable examples include the buildup of a shelf-edge reefal system during the Late Jurassic; its subsequent burial in the Late Cretaceous, as massive turbidity currents and debris flows reached the lower rise; the appearance of a dual shelf-edge system and widespread carbonate production during the Paleogene; rapid progradation of thick deltaic prisms during the middle Miocene; and deep incision of the shelf edge by submarine canyons during the Pleistocene.Massive downslope gravity flows have dominated both the depositional and erosional history of the New Jersey margin during most of the last 135 m.y. The importance of periodic widespread erosion is recorded by correlative unconformities at the boreholes. These unconformities also correlate well with supercycle boundaries of the Vail depositional model, thereby providing field validation of the supercycle framework of the model.

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“…Sed3 (∼ 17 to ∼ 15 Ma) exhibits turbidite deposited graded bedding ) and a higher sedimentation rate than Sed2 (Frakes, 1975), which are both suggestive of relatively weak bottom currents. Deposition of Sed3 occurred during the Mid-Miocene climate optimum (McGowran, 1979) the warmest interval of the Neogene. These warm conditions led to erosion of the TransAntarctic Mountains by temperate glaciers (Barrett, 1999).…”

Section: Patterns Of Sedimentation and Possible Causesmentioning

confidence: 99%