H. Kozur
Beiträge zur Stratigraphie der Trias II

GPM 3, 4, p. 1–20

The differences in the stratigraphical range of the ammonoid guide generaexactly established by TOZER (1971) from the dilleri-zone up to the magnus zone as stated by KRYSTYN (1973) are discussed. These differences are caused by unsufficient geological data and misinterpretation of the geology in the profiles investigated by KRYSTYN (1973). Then some real problems in the correlation between the North American and European Upper Triassic are discussed (see table 1).

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