radiolaria - Marum

Bibliography - 1992 Radiolaria 14
Kaminski, M.A., Baumgartner, P.O., Bown,
P.R., Haig, D.W., McMinn, A., Moran, M.J.,
Mutterlose, J. & Ogg, J.G. 1992.
Magnetostratigraphic synthesis of Leg 123: sites 765 and
766 (Argo Abyssal Plain and lower Exmouth Plateau). In:
Proceedings of the Ocean Drilling Program, Scientific
Results. (Gradstein, F.M., Ludden, J.N. et al., Eds.), vol.
123. College Station, TX (Ocean Drilling Program), pp.
717-737.
During ODP Leg 123, Sites 765 and 766 were drilled to
examine the tectonic evolution, sedimentary history, and
paleoceanography of the Argo Abyssal Plain and lower Exmouth
Plateau. At each site, the quality of magnetostratigraphic and
biostratigraphic records varies because of complicating factors,
such as the predominance of turbidites, the presence of condensed
horizons, or deposition beneath the CCD.
Based primarily on the presence of nannofossils, the base of
the sedimentary section at Site 765 was dated as Tithonian. A
complete Cretaceous sequence was recovered at this site, although
the sedimentation rate varies markedly through the section. The
Cretaceous/Tertiary boundary is represented by a condensed
horizon. The condensed Cenozoic sequence at Site 765 extends
from the upper Paleocene to the lower Miocene. A dramatic increase
in sedimentation rate was observed in the lower Miocene, and a 480m-thick
Neogene section is present. The Neogene section is
continuous, except for a minor hiatus in the lower Pliocene.
The base of the sedimentary section at Site 766 is Valanginian,
in agreement with the site's position on marine magnetic anomaly
M11. Valanginian to Barremian sediments are terrigenous, with
variable preservation of microfossils, and younger sediments are
pelagic, with abundant well-preserved microfossils. Sedimentation
rate is highest in the Lower Cretaceous and decreases continually
upsection. Upper Cenozoic sediments are condensed, with several
hiatuses.
Kanamatsu, T., Nanayama, F., Iwata, K. &
Fujiwara, Y. 1992. Pre-Tertiary systems on the western
side of the Abashiri tectonic line in the Shiranuka area,
eastern Hokkaido, Japan: Implications to the tectonic
relationship between the Nemuro and Tokoro Belts. J. geol.
Soc. Japan, 98/12, 1113-1128. (in Japanese)
Kemkin, I.V., Rudenko, V.S. & Kojima, S. 1992.
Early Cretaceous Radiolarians from the Chernaya River Area,
Southern Sikhote-Alin. Bull. Nagoya Univ. Furukawa Mus.,
8, 27-35.
Early Cretaceous (Valanginian-Barremian) radiolarian
assemblages from clastic rocks (olistostrome-turbidite) distributed
in the Chernaya River area indicate that the sedimentary rocks
attributed to the Upper Paleozoic form an accretionary complex
together with the rocks in the Dalnegorsk and Kavalerovo areas in
the Taukha terrane to the north. Sedimentary rocks in the studied
area include Permo-Carboniferous fusulinid-bearing limestone
closely associated with basic volcanic rocks, Late Permian and Late
Jurassic bedded chert with radiolarians, and shallow-marine clastic
deposits with Berriasian-Valanginian fauna and flora. These rocks
are all interpreted as blocks and slabs intermingled with the Early
Cretaceous olistostrome and turbidite complexes formed during the
subduction process along the continental margin of Northeast Asia
Kiessling, W. 1992. Paleontological and facial features of
the Upper Jurassic Hochstegen Marble (Tauern Window,
Eastern Alps). Terra Nova, 4/2, 184-197.
Micropalaeontological, microscopic and mineralogical
investigations of the ductily deformed and greenschist-facies
metamorphic Hochstegen Marble in the Tauern Window shed new
light on its stratigraphy and facies.
New radiolarian and sponge spicule discoveries have been made
in cherty limestone marbles. They confirm previous age assignments
and permit for the first time a more exact micropalaeontological age
determination of early Tithonian for the upper parts of the marble.
Forty morphotypes of radiolarians could be distinguished; in one
sample a Fisher diversity index of 6 is reached indicating deeper
marine conditions. The spicule fauna is also diverse and shows
affinity to the S-German Malm. In respect to all the data it can be
presumed that carbonate sedimentation of the Hochstegen Marble
took place in a deeper marine environment at the southern margin of
the European continent (Helvetic realm) during the whole Late
Jurassic.
Kiminami, K., Niida, K., Ando, H., Kito, N.,
Iwata, K., Miyashita, S., Tajika, J. &
- 82 -
Sakakibara, M. 1992. Cretaceous-Paleogene arc-trench
systems in Hokkaido. In: Paleozoic and Mesozoic Terranes:
Basement of the Japanese Island Arcs. 29th IGC Field Trip
Guide Book. (Adachi, M. & Suzuki, K., Eds.), vol. 1. Nagoya
University, Nagoya, Japan. pp. 1-43.
Kimura, G., Rodzhestvenskiy, V.S., Okamura,
K., Melinkov, O. & Okamura, M. 1992. Mode of
mixture of oceanic fragments and terrigenous trench fill in an
accretionary complex; example from southern Sakhalin.
Tectonophysics, 202/2-4, 361-374.
Four modes of mixture of oceanic materials such as cherts,
limestones and basalts, and terrigenous trench fill sediments are
recognized in the Cretaceous accretionary complexes in southern
Sakhalin, Far eastern Pacific margin of the U.S.S.R. The first mode is
a thin-skinned stacking of pelagic bedded cherts with black shale,
due to duplex formation in association with shallow underplating or
off-scraping. The second mode is a mixture of the uppermost part of
the oceanic crust with terrigenous trench fill sediments due to
olistostrome formation.
Reconstruction of the original sequence in ascending order
suggests that the basement is pillow basalt, with overlying pelagic
sediments of chert and limestone, olistostrome caused by collapse
of oceanic crust due to its bending before encountering a trench, and
finally trenchfill sediments of turbidite. This sequence is imbricated
by thrusting, which appears to have occurred at the time of
underplating.
The third mode is a tectonic mixing of oceanic fragments and
terrigenous sediments due to shear which is related to
underthrusting of the oceanic plate. A reduction in the supply of
trench fill sediments causes copious accretion of the upper part of
oceanic crust. The fourth mode is in-situ basalt volcanism at the
trench, where thick baked margins of terrigenous shale are formed
around the injected basalts. This mode appears to represent a ridgetrench
encounter. These four different modes of mixing seem to be
usual in ancient accretionary complexes in orogenic belts.
Kito, N. & De Wever, P. 1992a. Nouvelles espèces
d'Hagiastridae (radiolaires) du Jurassique Moyen de sicile
(Italie). Rev. Micropaléont., 35/2, 127-141.
Three new species of Hagiastridae (Radiolaria) of Middle
Jurassic from Sicily are described. The definitions of Hagiastridae
RIEDEL, Hagiastrinae RIEDEL, Tritrabinae BAUMGARTNER, Tritrabs
BAUMGARTNER and Angulobracchia BAUMGARTNER are modified.
Angulobracchia is included in this family. The genus Cavabracchia is
newly described.
Kito, N. & De Wever, P. 1992b. Revision of the
classification and phylogeny of Hagiastridae (Radiolaria). In:
Proceedings of the Third Radiolarian Symposium. (Sakai, T.
& Aita, Y., Eds.), vol. 8 . News of Osaka
Micropaleontologists, special Volume, Osaka. pp. 67-76. (in
Japanese)
The phylogenetic relation and taxonomic nature of Hagiastrid
genera are examined by cladistic method. Thirty species are
analysed based on 16 sets of morphologic characters. A new
terminology for the canal-beam system is proposed. The analysis
indicates that Archaeohagiastrum, Archaeotriastrum, Tetraditryma
and Angulobracchia are monophyletic, Tetratrabs are paraphyletic,
and Tritrabs, Hagiastrum and Homoeoparonaella are polyphyletic.
Subfamily Tritrabinae is closely related to Hagiastrinae rather than
Tetraditryminae. A proposed phylogenetic tree based on morphologic
analysis is generally concordant with stratigraphic records.
Kurimoto, C. 1992. Discovery of Jurassic radiolarians
from the Takashiroyama formation in the Sasayama district,
Hyogo Prefecture, southwest Japan. J. geol. Soc. Japan,
98/8, 787-790. (in Japanese)
Kuwahara, K. 1992. Late Carboniferous to Early Permian
radiolarian assemblages from Miyagawa area, Mie Prefecture,
Japan. In: Proceedings of the Third Radiolarian Symposium.
(Sakai, T. & Aita, Y., Eds.), vol. 8 . News of Osaka
Micropaleontologists, special Volume, Osaka. pp. 1-7. (in
Japanese)
Late Carboniferous to Early Permian radiolarian assemblages
were recognized from allochthonous chert blocks in the Chichibu
Belt, Miyagawa area, Mie Prefecture, Japan. I distinguish three
assemblages based on the genus Pseudoalbeillella. One of these
radiolarian assemblages include Pseudoalbeillella u-forma Group.