函館付近海岸段丘の段丘面傾斜
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概要
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There are two series of marine terraces - Akagawa Terrace and Hiyoshi-cho Terrace - in this area (Fig. 1) .<BR>Some geomorphological features found on hese terrace surfaces are as follows:<BR>1) The slopes of the Akagawa terrace surface are steeper than those of the Hiyoshi-cho terrace surface (Fig. 2-6) .<BR>2) The northwestern parts are different from the southeastern parts concerning the nature of the slopes of terrace surfaces.<BR>3) The ancient strand line has affected the gradient of the Akagawa terrace surfaces at the northwestern part, and has much to do with the gradient of the Hiyoshi-cho terrace surfaces at the southeastern part (Fig. 7, 8) .<BR>4) Correlations are found between the heights of bedrocks and gradients of the terrace surfaces (Fig. 9, 10) .<BR>5) The surface gradients of the terraces with thick terrace deposits are gentler than those with thin terrace deposits.<BR>6) The maximum size of the terrace gravels has relations with the gradients of Akagawa Terrace at the northwestern parts in this district but has no relation with the gradients at the other places (Fig. 11, 12) .<BR>7) Width of the terrace surfaces has relations with gradients of the terrace surfaces (Fig. 13) .<BR>There is an approximate correlation between the gradients of the terrace surfaces and the height of the bedrock, thickness of the terrace gravels and width of the terrace surfaces.<BR>The writer found the influence of a tectonic movement in the northwestern part of Akagawa Terrace and the southeastern part of Hiyoshi-cho Terrace, but he found the features of landform caused by eustatic movement at the other places.
- 東北地理学会の論文
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