北上山地・外山高原の周氷河地形

概要

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On Sotoyama Plateau (altitude 700-1, 000 m), the writer found mounds, Taschenböden and cryopediments. Mounds are developed in the marsh of Oonotai, situated about 680 meters above sea level, and are 6-10 meters in diameter and 3-5 meters in height. Taschenböden axe observed between the layers of pumcie and reddish volcanic ashes, both of which cover the cryopediment sloping gently southward with altitude of 680 meters. Cryopediments occupy considerable area with altitudes of approximately 670-760 meters above sea level. According to morphological and botanical evidences, these three morphological features are believed to have been developed during the last glacial period when cold climate prevailed on this plateau.
東北地理学会の論文