Results 241 to 250 of about 35,895 (262)
Some of the next articles are maybe not open access.
Biostratigraphy : Armorican massif
1988International ...
Chauvel, Jean-Jacques +3 more
openaire +2 more sources
Permian ammonoid biostratigraphy
Geological Society, London, Special Publications, 2016Abstract 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.
openaire +2 more sources
Biostratigraphy and the Yushe Basin
2013Volume I of Late Cenozoic Yushe Basin, Shanxi Province, China: Geology and Fossil Mammals presents the physical setting of Yushe Basin on the eastern edge of the Loess Plateau in North China, and documents the stratigraphy and paleomagnetic dating of the Yushe Group.
Zhan-Xiang Qiu, Lawrence J. Flynn
openaire +2 more sources
Primary Factors in Biostratigraphy
AAPG Bulletin, 1958Three-dimensional contiguous biostratigraphic units, like rock units, may be regarded as belonging to three conceptually distinct categories: (1) units defined essentially by position in vertical succession may include zonule and zone; (2) the term biosome is proposed for mutually intertongued units defined on the basis of both vertical and lateral ...
openaire +2 more sources
Ammonoid Biostratigraphy in the Jurassic
2015In the Jurassic, ammonoids showed the most rapid evolution and thus are successfully used as tools for subdividing and dating marine sediments of this period. Evolutionary driven morphological shifts within lineages as well as immigration and extinction events allow precise characterizations of faunas within time.
openaire +2 more sources
Methods in biostratigraphy–a reply to
Geobios, 2003Abstract A recent publication in Geobios is the reason for contrasting two methods of correlation. It is concluded that the use of the “Faunal Distance Index” gave erroneous results in the examples studied, whereas the study of evolutionary lineages gave results that are more consistent with accepted correlations.
openaire +2 more sources
The Zone, Base of Biostratigraphy
AAPG Bulletin, 1951A short review of the historical development of the term "zone" is given. Faunas can not be used for chronological paralleling, excepting within small areas. Some rules of phylogenetic evolution are given, offering the basis for the geological measuring of time.
openaire +2 more sources