The Neogene Tertiary formations in the eastern part of Toyama Prefecture overlie the so-called Hida gneiss, granite and Tetori group unconformably, although locally with fault contact, and are covered with Pleistocene or Recent elevated alluvial fan deposits. They form a monoclinal structure dipping to northwest wlth general trend of northeast to southwest direction. The general stratigraphy of this district is asfollowing table, in descending order.
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