Ichthyoliths from Some Northwest Pacific Sediments, DSDP, Leg 32

Dunsworth, M.J.; Doyle, P. S.; Riedel, W. R.

doi:10.2973/dsdp.proc.32.135.1975

Cited by 11 publications

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“…Table 2 lists, by numerically ordered name-descriptions, the ichthyolith subtypes identified at Site 436. The description of two new ichthyoliths requires the following changes to the system of descriptors ( Doyle et al, 1974;Dunsworth et al , 1975;Ramsey et al, 1976; Triangle smooth surface Doyle et al, 1978) …”

Section: Resultsmentioning

confidence: 99%

“…Hans Thierstein (Scripps Institution of Oceanography) and Fritz Theyer (University of Hawaii) critically reviewed the manuscript and made suggestions resulting in its improvement. Prominence with wye-line Doyle et al, 1978 Pointed and skirted Doyle et al, 1978 Kite-shaped elongate prominence Doyle et al, 1974 Plain and lined lanceolate Doyle et al,1 978 Large with numerous lines Doyle et al, 1974 Two triangles Doyle et al, 1974Rectangular saw-toothed Doyle et al, 1974 Rectangular serially saw-toothed Dunsworth et al, 1975 Asymmetrical peaks narrow depression Doyle et al, 1974Flexed triangle 102-112 Doyle et al, 1974 Flexed triangle shallow inbase Doyle et al, 1974 Flexed triangle shallow inbase > 120 Dunsworth et al, 1974, emend. Edgerton et al, 1977 Triangle double flex Dunsworth et al, 1975 Triangle with high inline apex Doyle et al, 1974 Narrow triangle straight inbase Doyle et al, 1974 Wide triangle straight inbase Doyle et al, 1974 Triangle with parallel inline Doyle et al, 1 974 Triangle smooth surface new subtype Narrow triangle sharply pointed Ramsey et al, 1976 Wide triangle Dunsworth et al, 1975 Triangle sigmoid Dunsworth et al, 1975, emend.…”

Section: Acknowledgmentsmentioning

confidence: 99%

“…Edgerton et al, 1977 Curved triangle pointed margin Doyle et al, 1974 Triangle square inline Doyle et al, in press, emend. Edgerton et al, 1977 Small triangle keeled edges Ramsey et al, 1976 Small triangle long striations Dunsworth et al, 1975 Triangle short wing Doyle et al, 1 974 Triangle medium wing Doyle et al, 1974 Triangle with base angle Dunswcrth et al, 1975 Triangle pointed margin ends Doyle et al, 1974 Triangle hooked margin Doyle et al, 1974 Triangle sigmoid rough Ramsey et al, 1976 Triangle small top Ramsey et al, 1976 Short triangle stepped margin Doyle et al, 1974 / b6 / c2,3,4,5 / d2 /el Ramsey et al (1976), Triangular toothed. S1.4, D36.…”

Section: Acknowledgmentsmentioning

confidence: 99%

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Ichthyoliths from Site 436, Northwest Pacific, Leg 56, Deep Sea Drilling Project

Doyle¹,

Riedel²

1980

Initial Reports of the Deep Sea Drilling Project

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Approximately 20 meters of the section near the bottom of Hole 436 was "unfossiliferous," overlain by middle Miocene mudstone with siliceous microfossils and underlain by Cretaceous chert. Therefore we attempt to determine the age of these pelagic clays on the basis of the ichthyoliths. Site 436 is at 39°55.96'N, 145 °33.47 'E, in a water depth of 5240 meters. The cores investigated here (Nos. 39 and 40) are from 359.5-378 meters below the sea floor. In addition, we studied one sample from Core 41, containing Late Cretaceous radiolarians (436-41-1, 26-31 cm).Our system of discrimination and nomenclature is that developed by Doyle et al. (1974, pp. 825-905, pis. 1A-J, 2A-M, 3, 4) and modified in subsequent papers

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Section: Resultsmentioning

confidence: 99%

Section: Acknowledgmentsmentioning

confidence: 99%

Section: Acknowledgmentsmentioning

confidence: 99%

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Ichthyoliths from Site 436, Northwest Pacific, Leg 56, Deep Sea Drilling Project

Doyle¹,

Riedel²

1980

Initial Reports of the Deep Sea Drilling Project

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“…INTERPRETATIONS Over the past 10 yr., we have built up an ichthyolith stratigraphy by establishing the ranges of approximately 120 taxa (subtypes) in sediment sequences in which ages have been determined on the basis of other groups of microfossils, mainly calcareous nannoplankton (Doyle et al, 1974;Dunsworth et al, 1975;Doyle et al, 1977;Gottfried et al, 1985). Application of this ichthyolith stratigraphy to pelagic clay sequences results in age assignments to about the level of epochs within the Cenozoic (Edgerton et al, 1977;Doyle and Riedel, 1979b;Kaneps et al, 1981).…”

Section: Conventional Stratigraphicmentioning

confidence: 99%

Ichthyolith Biostratigraphy of Western North Pacific Pelagic Clays, Deep Sea Drilling Project Leg 86

Doyle¹,

Riedel²

1985

Initial Reports of the Deep Sea Drilling Project

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Pelagic clay sequences representing most of the Cenozoic Era were cored at Sites 576 and 578; the three holes drilled at Site 576 penetrated to Cretaceous sediments. A Cretaceous-Paleogene succession was obtained from Hole 577. The combined results from these holes, and some piston cores from more eastern localities, provide the basis for a synthesis of North Pacific Cenozoic ichthyolith stratigraphy. The synthesis is approached both by conventional biostratigraphic procedures and by a probabilistic interpretation based on events weighted according to their relative reliabilities. Seven new taxa from the Paleocene are described, thus improving the stratigraphic resolution attainable in that epoch.

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“…Their utilitarian system consists of a series of letters and numbers which describe the ichthyoliths morphologically and makes no implication of zoolog-© 1984 by Th e University of Oklahoma ical affinities. The original system ofDoyle et al (1974) was subsequently modified by Dunsworth et al (1975), Ramsey et al (1976), Do yle et al (1978, Riedel (1979, 1980) , Kozarek and Orr (1981 ), and Gottfried et al (in press) to describe new ichthyolith subtypes found in Cenozoic and Mesozoic deposits . Using this coded system, Doyle and her colleagues at the Scripps Institution ofOceanography have been able to successfully assign ages to otherwise unfossiliferous pelagic cla ys from deep ocean cores.…”

Section: Introductionmentioning

confidence: 97%

A coded utilitarian system for identifying Paleozoic ichthyoliths

Tway

1984

Journal of Vertebrate Paleontology

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Additional research on Late Pennsylvanian ichthyoliths from the m idcontinent region has necessitated th e modification and expansion of a pre vious identification system (Tway, 1979a). This coded classificat ion scheme consists of a seri es of letters and numbers to describe th e ichthyolith morphology without implying biological relationships. The key is based on observations of ichthyoliths in three dimensions as seen in reflected light and the scanning electron microscope . This scheme provides a means of utilizing ichthyoliths for geological studies without assigning binomial names to them before their biological relationships are understood.

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Ichthyoliths from Some Northwest Pacific Sediments, DSDP, Leg 32

Cited by 11 publications

References 0 publications

Ichthyoliths from Site 436, Northwest Pacific, Leg 56, Deep Sea Drilling Project

Ichthyoliths from Site 436, Northwest Pacific, Leg 56, Deep Sea Drilling Project

Ichthyolith Biostratigraphy of Western North Pacific Pelagic Clays, Deep Sea Drilling Project Leg 86

A coded utilitarian system for identifying Paleozoic ichthyoliths

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