著者

羽田 麻美

出版者

日本地形学連合

雑誌

地形 (ISSN:03891755)

巻号頁・発行日

vol.28, no.1, pp.41-52, 2007-01-25

---

Rillenkarren are well developed on the surface of pinnacles at four karst areas, i.e., Akiyoshi Plateau, Hirao Plateau and Yamazato (Okinawa) in Japan and Lipica in Slovenia. Total 325 rillenkarren on total 67 pinnacles were selected for measurements. The width and depth of rillenkarren were measured using a carpenter's profile gauge and the slope angles of the trough of rillenkaren, i.e., slope angles of pinnacles, were measured using a clinometer. The results are as follows: 1) the slope angle of pinnacles with rillenkarren ranges between 29°and 65°in Akiyoshi and Hirao Plateaus, while it takes between 40°and 77°in Yamazato and Lipica; 2) the width of rillenkarren in four areas ranges between 1.5 cm and 6.5 cm, and it is a little narrower at Yamazato than that of the other three areas; 3) there is a difference in depth of rillenkarren, i.e., it ranges between 0.2 cm to 2.1 cm at Akiyoshi and Hirao Plateaus, between 0.4 cm to 4.2 cm at Yamazato and between 0.7 cm to 3.2 cm at Lipica; and 4) there is a common characteristic in all areas between the slope angle of pinnacles and the shape of rillenkarren, i.e., both of depth and width of rillenkarren become larger with increasing in slope angle of pinnacles.