鮮新・更新統掛川層群に認められたreflected turbidite

概要

論文の詳細を見る
Reflected turbidites were discovered from the middle part of the Horinouchi Formation (Kakegawa Group), Shizuoka, Japan. Typical reflected turbidite beds in this formation have several ripple laminated intervals, which show eastward and westward paleoflows that correspond with upslope and downslope directions, respectively.Several turbidite beds are traceable along ash beds in the Horinouchi Formation. It is demonstrated that major part of the turbidite beds was deposited from reflected currents, and that some of them tend to thicken toward the foot of seaward slope of the basin where climbing ripple laminations were recognized. These characteristics imply that the obverse turbidity current had sufficient capacity, and a high rate of sediment accumulation was introduced by stagnation of the reverse current at the foot of seaward slope. Detailed description of their spatial variations will allow us to understand details of their depositional mechanisms.
日本地質学会の論文
2000-01-15