@article{oai:soar-ir.repo.nii.ac.jp:00011865,
 author = {Kumon,  Fujio},
 issue = {1-2},
 journal = {Memoirs of the Faculty of Science, Kyoto University. Series of geology and mineralogy},
 month = {Sep},
 note = {The stratigraphy and correlation of the Cretaceous strata in eastern Shikoku and Kii Peninsula are examined based on the radiolarian biostratigraphy. As the results, the stratigraphic change of the sandstone composition was recognized. The sandstones of the late Early Cretaceous are rich in feldspar, especially of plagioclase, and poor in rock fragments. Most sandstones of the Late Cretaceous are dominant in rock fragments, especially of acidic to intermediate volcanic rocks. Most of the Paleogene sandstones are characterized by very dominant quartz and poor rock fragments. Such stratigraphic change is also supported by the change of conglomerate composition. It reflects the change of the provenance nature. The increasing trend of rock fragments consisting mainly of volcanic rocks in the Cretaceous sequences indicates that the volcanism of acidic to intermediate nature took place in the provenance to the north of the basin contemporaneously with the sedimentation of the Late Cretaceous Shimanto Supergroup, and provided a large amount of volcanic materials to the basin. This volcanism corresponds to the so~called late Mesozoic Igneous Activity in the Inner Zone of Southwest Japan. Thus, the Late Cretaceous Shimanto Supergroup represents one type of the forearc sedimentation in magmatic arc-trench system. The difference of clastic composition between the Cretaceous and the Paleogene is explained by the unroofing process of the Cretaceous magmatic terrane. Lastly, the geotectonic development of the Shimanto Belt and its provenance is discussed mainly based on the sedimentological analyses. The marginal sea setting similar to the present Philippine Sea is considered to be preferable for the Shimanto geosyncline., Article, Memoirs of the Faculty of Science, Kyoto University. Series of geology and mineralogy. 49(1-2):63-109 (1983)},
 pages = {63--109},
 title = {Coarse Clastic Rocks of the Shimanto Supergroup in Eastern Shikoku and Kii Peninsula, Southwest Japan},
 volume = {49},
 year = {1983}
}