Abstract
The Paleozoic and Mesozoic in the Kyoto Nishiyama area are divided into the Takatsuki Formation (redefined), the Shimamoto Formation (newly defined) and the Tamba Terrane. Late Permian radiolarians are extracted from felsic tuff, siliceous mudstone and mudstone of the Takatsuki Formation, which mainly consists of clastic rocks and tectonically overlies the Tamba Terrane. The Shimamoto Formation is composed of clastic sediments and one greenstone block. Middle Triassic radiolarians are extracted from mudstone of this formation. The Tamba Terrane is subdivided into the Honzanji Complex (redefined), the Izuriha Complex (redefined) and the Tano Complex in tectonically descending order. Early Late Triassic, late Late Triassic and Early Jurassic radiolarians are reported from mudstone of the Honzanji, Izuriha and Tano complexes, respectively. These sedimentary complexes are thought to be accretionary complex from their lithofacies and geologic structure. This indicates that the Tamba Terrane continuously was formed from early Late Triassic.
