a
6 Introduction
END OF PERMIAN
---END OF CRETACEOUS
Fig. 0.2 a, b. Diagrammatic representation (ours. not his) of the Hypothesis of Continental Drift of
Alfred Wegener. a Continental blocks made of light "sial " float iceberg-like in the heavier mantle
"sima". As they drift apart, mountain ranges form at the bow, while new sea floor forms in between.
b The breakup of Pangaea, first envisaged by A. Wegener, in a modern reconstruction by R. S. Di etz
and J. C. Holden (1970, J Geophys Res 75:4939. simplified)
6 Introduction
END OF PERMIAN
---END OF CRETACEOUS
Fig. 0.2 a, b. Diagrammatic representation (ours. not his) of the Hypothesis of Continental Drift of
Alfred Wegener. a Continental blocks made of light "sial " float iceberg-like in the heavier mantle
"sima". As they drift apart, mountain ranges form at the bow, while new sea floor forms in between.
b The breakup of Pangaea, first envisaged by A. Wegener, in a modern reconstruction by R. S. Di etz
and J. C. Holden (1970, J Geophys Res 75:4939. simplified)