Results 161 to 170 of about 2,004 (204)
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Palaeogeography, Palaeoclimatology, Palaeoecology, 2018
A complete chitinozoan succession through the uppermost Tremadocian to lower Darriwilian (Lower and Middle Ordovician) at Honghuayuan, northern Guizhou Province in South China, was systematically studied and 47 species of 14 genera were identified.
Yan Liang +5 more
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A complete chitinozoan succession through the uppermost Tremadocian to lower Darriwilian (Lower and Middle Ordovician) at Honghuayuan, northern Guizhou Province in South China, was systematically studied and 47 species of 14 genera were identified.
Yan Liang +5 more
semanticscholar +1 more source
Reflected light microscopy of chitinozoan fragments
Marine and Petroleum Geology, 1985Abstract Certain optical properties of some Silurian-Ordovician chitinozoans have been measured and their morphology described, using polished, block-mounted samples and polished thin sections. The chitinozoans were found to be optically isotropic and many fine details of their morphology were observed using reflected light microscopy.
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Lethaia: an international journal of palaeontology and stratigraphy, 2018
Chitinozoans are widespread microfossils in the Ordovician to Devonian strata. Although they have been widely adopted in biostratigraphy, their environmental preferences are rarely discussed.
Yan Liang +6 more
semanticscholar +1 more source
Chitinozoans are widespread microfossils in the Ordovician to Devonian strata. Although they have been widely adopted in biostratigraphy, their environmental preferences are rarely discussed.
Yan Liang +6 more
semanticscholar +1 more source
The Ordovician chitinozoan biodiversification and its leading factors
Palaeogeography, Palaeoclimatology, Palaeoecology, 2007Abstract Regional and global dataset now available for almost all of the Ordovician fossil groups have led to a search for the causes controlling the major biodiversification events that occurred during the Ordovician period. A review of the physico-chemical state of the Ordovician world is presented, with an emphasis on the regional or global ...
Achab, Aïcha, Paris, Florentin
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Chitinozoan reflectance: a Lower Palaeozoic thermal maturity indicator
Marine and Petroleum Geology, 1992Abstract Chitinozoan reflectance ( R ch ) is an innovative technique of thermal maturation determination suitable for Lower Palaeozoic sediments where the established reflectance scale, vitrinite reflectance ( R v ), is not applicable due to the lack of vitrinite.
Paul M. Tricker +2 more
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Ordovician Chitinozoans from Florida Well Samples: ABSTRACT
AAPG Bulletin, 1969Ordovician chitinozoans recovered from a grayish-black shale are described for the first time for subsurface north-central Florida. The lowest sample of the Sun Oil Company, Earl Odom No. 1 well, Suwannee County, Florida, is dated between late Arenigian and early Caradocian. The Ordovician is overlain directly by Silurian rocks.
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Emergence, biodiversification and extinction of the chitinozoan group
Geological Magazine, 2010AbstractChitinozoans are considered as reproductive bodies of marine invertebrates, called chitinozoophorans. These chitinozoophorans were most likely to have been small, pelagic or necto-pelagic, soft-bodied, probably wormlike animals, and judging from the size of chitinozoans, they probably measured from a few millimetres to a few centimetres in ...
YNGVE GRAHN, FLORENTIN PARIS
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Silurian Chitinozoans from Florida Well Samples: ABSTRACT
AAPG Bulletin, 1969End_Page 2036------------------------------Chitinozoans of Silurian age were recovered from four wells in Florida: Cone No. 1, Tillis No. 1, Hilliard No. 1, and Kie Vining No. 1. An attempt was made to establish a correlation between the four wells using the chitinozoan evidence, and the results are presented.
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Early Ordovician scolecodonts and chitinozoans from Tallinn, North Estonia
Review of Palaeobotany and Palynology, 2006Abstract In the Lower Ordovician siliciclastic succession of Kadriorg, Tallinn, North Estonia, scolecodonts were recorded at different stratigraphical levels starting from the lower Tremadocian, and a rich assemblage of chitinozoans was found from the Paroistodus proteus Conodont Zone.
Olle Hints, Jaak Nõlvak
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Ordovician and Silurian chitinozoan biozones of western Gondwana
Geological Magazine, 2006A formal Ordovician–Silurian chitinozoan biozonation for western Gondwana is proposed. This palaeogeographic province includes South America, and was located in medium to high latitudes during Ordovician and Silurian times. Ordovician chitinozoans are known from northern Argentina, southern Bolivia, and Brazil.
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