Results 211 to 220 of about 39,954 (246)
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Micropaleontology and Biostratigraphy

2021
To stratify six sediment cores, we applied the calcareous plankton biostratigraphy of the upper sediment cover based on the foraminiferal and nannofossil zonations suggested in Chap. 3 for the Ioffe Drift area. Datum levels (first and last appearances) of zonal index species in individual cores were used to denote zonal boundaries. The oldest recovered
Elena Ivanova, Olga Dmitrenko
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Biostratigraphy of Triassic Ammonoids

2015
The Triassic is a turning point in the evolutionary history of ammonoids, characterized by the flourishing Ceratitida and the appearance of the first heteromorphs. Following the end-Permian mass extinction, ammonoids were among the first groups to rediversify by producing many new taxa.
Jenks, James F.   +4 more
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Systematic biostratigraphy: A solution to problematic classification systems in biostratigraphy

Palaeoworld, 2014
Abstract Systematic biostratigraphy is based on the exclusive use of monophyletic marker taxa. Non-monophyletic, or artificial, marker taxa have been shown to change biostratigraphic correlations, a situation that can be rectified by using systematics to ensure that marker taxa are monophyletic or natural.
Tegan A. Vanderlaan, Malte C. Ebach
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Conodonts in Ordovician biostratigraphy

Lethaia, 2017
The long time interval after Pander's (1856) original conodont study can in terms of Ordovician conodont biostratigraphical research be subdivided into three periods, namely the Pioneer Period (1856–1955), the Transition Period (1955–1971) and the Modern Period (1971-Recent).
Bergström, Stig M., FERRETTI, Annalisa
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The biostratigraphy of Carboniferous chondrichthyans

Geological Society, London, Special Publications, 2021
Abstract Among several groups of fishes existing in the Carboniferous, the Chondrichthyes appear to have the greatest stratigraphic potential. However, despite the long history of investigation into Paleozoic sharks, and especially their teeth, our knowledge of their usefulness in biostratigraphy and palaeoecology is still at an ...
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Biostratigraphy and Biogeography

2017
In this chapter, we analyze the patterns of vicariance and dispersal in fossil horses and the relationship with the environmental changes. We found that predominance of the dispersal events over vicariant ones is consistent with the migratory habits of horses. Ancestral distribution for the Equini tribe was ranged widely across North America.
María Teresa Alberdi, José Luis Prado
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Excellence in biostratigraphy

Trends in Ecology & Evolution, 2006
View Large Image | Download PowerPoint SlideBiostratigraphy. Microfossils and Geological Time gives a terrific review of the principles and development of dating rocks using the fossils that they contain (i.e. biostratigraphy). Although Brian McGoran concentrates on foraminifers, the book is worth reading for an understanding of the role of ...
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Permian fusuline biostratigraphy

Geological Society, London, Special Publications, 2017
Abstract A review of Permian fusuline biostratigraphy is made in this paper in order to improve the correlation of Permian strata globally. Permian fusuline biostratigraphy in the Tethyan and Panthalassan regions can be correlated roughly because the fusulines had good faunal communications between these two regions.
Yi-chun Zhang, Yue Wang
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Bolides and biostratigraphy

Geological Society of America Bulletin, 1983
The stratigraphic record is punctuated by episodes of mass extinction; these must be accounted for by major changes in the evolution of the Earth. Three groups of forces have acted on the Earth through time and may be adduced as the ultimate causes of many geological phenomena—including extinctions.
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The Biostratigraphy of Permian Palynofloras

Proceedings of the Annual Meeting. American Association of Stratigraphic Palynologists, 1970
Abstract Classical paleobotanical theory separates the floras of the Permian Period into four distinctive provinces: (1) the Gondwanian; (2) the Angaran; (3) the Ca‐thaysian; and (4) the Euramerican. These floras are based on the stem and leaf remains which are the chief preservable macroscopic parts of plants.
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