Results 231 to 240 of about 39,707 (262)

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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Chronostratigraphy and Biostratigraphy

Geological Magazine, 1965
AbstractComments are given on a number of papers dealing with principles and procedure in stratigraphic classification which have appeared in British journals during 1963–65. It is emphasized that a clear distinction should be made between biostratigraphic units—bodies of rock strata characterized by certain palaeontological features and bounded by the
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Nannofossils and biostratigraphy: An overview

Earth-Science Reviews, 1977
Abstract Intensive biostratigraphic studies of calcareous nannofossils have been carried out for only about a decade, even though nannofossils have been known for over a century. Although coccoliths have been reported from various Paleozoic deposits, datable assemblages are known only from Liassic (early Jurassic) and younger strata.
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Biostratigraphy and chronostratigraphic classification

2005
Summary Timescales could be as diverse as major taxic groups (e.g. an ammonite scale and a foraminiferal scale), realms (marine and terrestrial scales), or provinces (Paratethyan and Australasian provincial scales) themselves are diverse. Clearly we need a central reference controlling such potential exuberance.
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High resolution biostratigraphy [PDF]

Geological Society, London, Special Publications, 1993
Abstract The degree of stratigraphical resolution obtainable from biostratigraphical data provides, for most parts of the Phanerozoic, a finer discrimination than that obtained by other means. The full potential of biostratigraphy has not yet been realised in many parts of the geological column and much time and effort, in many cases ...
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Permian ammonoid biostratigraphy

Geological Society, London, Special Publications, 2016
Abstract A brief historical review of ammonoid-based Permian biostratigraphy is performed. Changes in ammonoid associations are shown for each of nine Permian stages. The major correlation problems were discussed. A renewed ammonoid zonal scale is proposed.
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