Geological Hazard Potential at the Baltic Sea and Its Coastal Zone: Examples from the Eastern Gulf of Finland and the Kaliningrad Area - The Baltic Sea Basin - page 353

is located only about 500 m from shoreline. Therefore, a big volume of sand is
redeposited at the terrace foot (Fig. 16.8a ) .
A very special bottom relief was identified near the terrace foot. The erosion
furrows (up to 30-50 cm deep) were observed at a depth of 8-12 m (Ryabchuk
et al. 2007 ) . Repeated surveys demonstrated that these forms are very stable in spite
A
B
Fig. 16.8 a Scheme of dynamics of the northern coastal zone of eastern Gulf of Finland. 1,
Offshore sediment transport along erosion furrows; 2, longshore sediment flow; 3, direction of
sediment transport toward the foot of submarine terrace in the area of longshore sediment flow
discharge; 4, edge of submarine terrace. b Side-scan sonar mosaic of erosion furrows (up to 20 m
wide, 600 m long, and 0.5 m deep) with sand ripples (heights 20-30 cm; distance between crests
50-100 cm)