Results 161 to 170 of about 2,786 (210)
Some of the next articles are maybe not open access.
The role of stratotypes in stratigraphy
Earth-Science Reviews, 2005Stephen L Walsh
openaire +3 more sources
International stage stratotypes
1996All of the Upper Carboniferous stages in the so-called ‘Heerlen Classification’, from the Chokierian to the Bolsovian, have their base stratotypes in northern England (the Westphalian D base stratotype has yet to be selected, although sites in South Wales will probably be strong contenders).
C. J. Cleal, B. A. Thomas
openaire +1 more source
Stratotype of Ordovician Whiterock Series
PALAIOS, 1991Here the authors reaffirm and document fossil ranges at the stratotype section for the base of the Whiterock Series in Whiterock Canyon, northern Monitor Range, Nevada, and designate a reference section at Meiklejohn Peak, Bare Mountain quadrangle, Nevada.
Reuben James Ross +2 more
openaire +1 more source
Iridium Abundances Across the Ordovician-Silurian Stratotype
Science, 1986Chemostratigraphic analyses in the Ordovician-Silurian boundary stratotype section, bracketing a major extinction event in the graptolitic shale section at Dob's Linn, Scotland, show persistently high iridium concentrations of 0.050 to 0.250 parts per billion. There is no iridium concentration spike in the boundary interval or elsewhere in
P, Wilde +5 more
openaire +2 more sources
Introduction to Part A Chronostratigraphic units: Historical stratotypes and global stratotypes
1995Publisher Summary This chapter discusses historical and global stratotypes. In agreement with common usage, the word “stage” is used in this presentation; both for the actual rocks deposited during an interval of time, and for the interval of time itself (sometimes called “age”).
openaire +1 more source
Earth-Science Reviews, 1999
Abstract Stratigraphy is a magnificent subject—magnificent in its breadth and scope, magnificent in its importance to so many lines of human endeavor. It is essentially that branch of geology which deals with the arrangement, the distribution, and the chronological succession of rock strata (and other associated rock bodies), with respect to any or
Marie-Pierre Aubry +3 more
openaire +1 more source
Abstract Stratigraphy is a magnificent subject—magnificent in its breadth and scope, magnificent in its importance to so many lines of human endeavor. It is essentially that branch of geology which deals with the arrangement, the distribution, and the chronological succession of rock strata (and other associated rock bodies), with respect to any or
Marie-Pierre Aubry +3 more
openaire +1 more source
Unit stratotypes for global stages: The Neogene perspective
Earth-Science Reviews, 2005Abstract Recent developments in integrated high-resolution stratigraphy and astronomical tuning of continuous deep marine successions invalidate arguments against the designation of unit stratotypes for global stages, the basic building blocks of the standard Global Chronostratigraphic Scale (GCS).
Hilgen, F.J. +2 more
openaire +2 more sources
Cyclostratigraphy and climatic eustasy. Example of the rupelian stratotype
Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science, 1997Abstract The Boom Clay Formation is a well-bedded deposit. Cycles have been recognised through grain-size variations, organic matter contents, carbonate beds, bed thicknesses, and the analysis of clay minerals, trace elements and stable isotopes.
Noël Vandenberghe +3 more
openaire +1 more source
Stratotypes and an International Geochronologic Scale
1978Abstract An international geochronologic scale is needed in order to provide a single universal standard of reference for dating rock strata, or events recorded in rock strata, anywhere in the world. There are many possible means of relating rock strata and the geologic events they record to the passage of ...
openaire +1 more source
Chapter A5 Langhian, serravallian, and tortonian historical stratotypes
1995Publisher Summary This chapter discusses Langhian, Serravallian, and Tortonian historical stratotypes. Chronostratigraphy does represent a basic common language of communication in Earth Sciences. However, most chronostratigraphic units of the standard Geologic Time Scale lack an appropriate and rigid definition in the rock stratigraphic record ...
RIO, DOMENICO +4 more
openaire +1 more source