Budget Amount *help 
¥2,000,000 (Direct Cost : ¥2,000,000)
Fiscal Year 1987 : ¥600,000 (Direct Cost : ¥600,000)
Fiscal Year 1986 : ¥1,400,000 (Direct Cost : ¥1,400,000)

Research Abstract 
(1) In order to examine what kind of landforms is created when waves are allowed to act on a gently sloping rock surface emerged as a result of uplift of the land, a laboratory test was performed using a model rocky coast with a uniform slope of 1/10. The model was made using a mixture of cement, sand, and water. The result showed that an abrasion terrace with a similar gradient to the original slope was formed in the surf zone and the shoreline angle was located slightly higher above Still Water Level. (2) A mathematical model was constructed to describe the formation of Holocence marine rockterraces. The terrace width, W , is expressed by Wi= [ Zi (B + Ri <tau>i + <lambda>i )/ h_b ] R_<i+1> <tau>_<i+1> ( i = 1,2,・・・n) where Z is the amount of sea level fall, R is the recession rate of coastal cliffs, <tau> is the time for sea level stillstand, R<tau> is the recession distance of the cliffs, <lambda> is the horizontal distance from the intersecting point of sea level and the original landform profile to the initial coastline position, B is the width of abrasion terrace on the original landform, h_b is the maximum water depth for submarine abrasion, and the suffixes il, i, and i+l denote the sea levels il, i, and i+l, respectively. (3) Seven coastal terraces well develop near Pukemuri Stream, Wairarapa, New Zealad, where the ages of three terraces (II, III, and IV ) out of seven are unknown. The above model was applied to this site to estimate the ages of these terraces. The result showed that the ages of II, III, and IVterraces were estimated at 6,000, 5,300, and 4,300 y B.P., respectively.In this estimation, the age values for Vand VIterraces were used for reference values. The estimated Iterrace age was 7,000 y B.P.which is colse to ^<14>Cvalue of Iterrace,about 6,700 y B.P. This suggests that model is reasonable.
