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INTRODUCTION The geology of Szechuan and the adjoining regions has been studied by the pioneer geologists such as F. von Richthofen~1, L. von Loczy~2, B. Willis and E. Blackwelder~3 and E. C. Abendanon~4 respectively on the northern and eastern
INTRODUCTION The geology of Szechuan and the adjoining regions has been studied by the pioneer geologists such as F. von Richthofen ~ 1, L. von Loczy ~ 2, B. Willis and E. Blackwelder ~ 3 and EC Abendanon ~ 4 respectively on the northern and eastern