フロント・レンジ，インディアン・ピークス周辺の残雪下の礫質ペイブメント地形の発達過程

• Main Author: 原 芳生
• Format: Report
• Language: Japanese
• Published: 立正地理学会 1988
• Subjects: Norway; Indian; Bare Rocks; glacier; Lapland
• Online Access: http://hdl.handle.net/11266/00010658; https://rissho.repo.nii.ac.jp/?action=repository_uri&item_id=9697; https://rissho.repo.nii.ac.jp/?action=repository_action_common_download&item_id=9697&item_no=1&attribute_id=20&file_no=1

Many kinds of pavement landforms are developed under various climates almost all over the world. These landforms have individually been studied by many previous researchers. However, comprehensive studies including the synthetical classification for the landforms have never been done up to this time. Under these circumstances, firstly, the author classified them into two kinds of the pavement forms based on their structures “bedrock pavement” and “stone pavement”. The surfaces of bedrock pavements are flattened bare rocks with joints such as limestone pavements. On the other hand, that of the stone pavements are accumulations of rock fragments, especially cobbles and boulders, in which stones are fitted together like a mosaic. Secondly, he classified the stone pavements into several sub-kinds of ones by paving processes and ways of concentration of boulders. The subnival stone pavement is a pavement occurred beneath a late-lying snow patch and one of sub-kinds of stone pavements developed under periglacial environments with paving processes of snow and ice. It is assumed that there are many processes for forming subnival stone pavements weight of snow, melting water to saturate fine materials beneath the pavement stones and to wash fines away from pavements. In order to clarify the pavement developmental processes, the main field researches by the author carried out on the alpine subnival boulder pavements (a kind of the subnival stone pavements) at the floor of glaciated valleys and the bottom of glacier cirques in the Indian Peaks Region, Colorado Front Range, Rocky Mountains. The same kinds of studies by the author have been done in the Central Japan Alps, the North Japan Alps, Mt. Gassan in N.E. Japan, Mt. Daisetsu in Hokkaidoh and Lapland, Finland and Norway, respectively. In this paper, he has, however, limited his study to the subnival pavements in the Colorado Front Range. The main subjects in this paper are summarized as follows : 1) The quantitative study for the pavements has been reported in Hara ...