Hi Micha,

I am not sure if these refereces will help, but you may have a look on
the following papers:

MUTTI, M. and WEISSERT, H. (1995): Triassic monsoonal climate and its
signature in Ladinian-Carnian carbonate platforms (Southern Alps,
Italy). - Journal of Sedimentary Research, B65, p. 357-367

KLEIN, G.D. ed. (1994): Pangea: Paleoclimate, tectonics, and
sedimentation during accretion, zenith, and breakup of a supercontinent.
- American Geological Society Special Paper 288
(should contain papers about d13C in the Triassic)

For a more general overview of the Triassic the book of Frakes et al.
may be helpful:

Frakes, L.A., Francis, J.E. and Syktus, J.I. (1994): Climate modes of
the phanerozoic: The history of the earth's climate over the past 600
million years. - Cambridge University Press, Cambridge, p. 274

Ciao,
Robert


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