The regional conodont zonations
of parts of this time-span have later been provided, e.
Among the diverse Emsian zonations
, the one based on the successive occurrence of different species of the genus Polygnathus is the most commonly used for biostratigraphical subdivisions and world-wide correlations (see, for example, Klapper and Johnson, 1975; Klapper, 1977; Weddige and Ziegler, 1977; Lane and Ormiston, 1979; Yolkin et al.
Figure 2 shows a composition of these maps, used by the authors as inputs to define seismogenic zonations
Such general crop zonations
are found elsewhere along floodplains in lowland South America as well.
Accordingly, there is a good correspondence between conodont zonations
of these areas, and most of the zones distinguished in Sweden can be recognized in Estonia (Viira et al.
Dempster comments on how the simple model for zonations
in the concept of a biosphere reserve has been interpreted in so many different ways to fit with the place-based and situation-specific contexts of individual biosphere reserves.
Here we report a study on the use of this technique to map trace elements in homogenized liver and in thin sections of sheep liver and show that copper shows zonations
whereas zinc is reasonably constant.
During the Upper Permian, the evolutionary rates of both shallow water and pelagic conodonts were rapid; detailed zonations
of shallow water and pelagic conodonts have been established.
Derived from interpreted data by regional experts, Aceca -- also a TGS-NOPEC Company, A2D's GeoData sets include: edited well log data, interpreted borehole litho-, sequence- and chrono- stratigraphy, synthetic seismograms, modeled borehole zonations
to include lithology, main depositional environment and depositional facies associations.
Because a number of Walliser's zones were not recognizable outside Cellon (Austria), several alternative zonations
have been proposed (e.
The use of Globorotalia crassaformis subspecies in biostratigraphical zonations
Recognition of various ecological associations of conodonts has resulted in different local conodont zonations
for shallow and deeper shelf environments of some stratigraphical intervals (Viira 1982).