Results 111 to 120 of about 169 (141)

Application of neural networks for chitinozoans recognition in images

Vestnik of geosciences
Paleontological identification of microfauna using automated image recognition represents an innovative practical application of existing software methods for analysis and classification based on computer vision and machine learning technologies. The development of software capable of recognition of Chitinozoans in images will simplify and speed up the
R. Yakupov, K. Gusmanova
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The Ordovician chitinozoan biozones of the Northern Gondwana domain

Review of Palaeobotany and Palynology, 1990
Abstract A formal biozonation is proposed for the Ordovician chitinozoans of the Northern Gondwana Domain. This palaeogeographic province, located at rather high latitudes during the Ordovician, includes southwestern Europe, central Europe, Middle-East, northern Africa and Florida.
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Ordovician chitinozoan zonation of Quebec and western Newfoundland

Journal of Paleontology, 1989
The purpose of this paper is to propose a chitinozoan zonation of the Ordovician of Quebec and western Newfoundland. On the basis of chitinozoan assemblages previously described from various sections, covering almost the entire Ordovician System, 22 biozones, based on first appearance of index species, are distinguished.
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Ordovician and Silurian chitinozoan biozones of western Gondwana

Geological Magazine, 2006
A 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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Chitinozoan reflectance: a Lower Palaeozoic thermal maturity indicator

Marine and Petroleum Geology, 1992
Abstract 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, John E.A. Marshall, Tim D. Badman   +2 more
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Chitinozoan reflectance in the Lower Palaeozoic of the Welsh Basin

Terra Nova, 1992
ABSTRACTVitrinite (woody matter) and spores are generally uncommon or absent in pre‐Devonian sediments. To determine organic maturity in the Lower Palaeozoic alternative methods, such as chitinozoan reflectance, must be employed. Chitinozoa are marine, vase‐shaped organic‐walled microfossils of unknown affinity.
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Correlations among the reflectances of vitrinite, chitinozoans, graptolites and scolecodonts

Organic Geochemistry, 1990
Abstract Paleozoic marine sequences sampled in outcrops and wells of northeastern Gaspe Peninsula (Quebec Appalachians) yield kerogen composed in part of vitrinite and zooclasts (chitinozoans, scolecodonts and graptolites) on which reflectance measurements were made.
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Palaeobiological significance of chitinozoan clusters with parallel vesicles

Marine Micropaleontology, 2022
Jakub Vodička, Lucy A. Muir, Joseph P. Botting, Václav Špillar, Oldřich Fatka   +4 more
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Ordovician Chitinozoans from Florida Well Samples: ABSTRACT

AAPG Bulletin, 1969
Ordovician 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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Silurian Chitinozoans from Florida Well Samples: ABSTRACT

AAPG Bulletin, 1969
End_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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