Landslides on the coast of western Kamchatka (Tochilo Section)

Abstract

The Tochilo section (Western Kamchatka) is located between the Amanina (in the south) and Etalona (in the north) rivers. It is composed by Cenozoic deposits. They are deformed into an anticline fold. There are landslide bodies on the south-west wing, which occupy at least 40% of the coastline. Their area increases from south to north from 0.03 to 0.76 km2, reaching a maximum in the core of the fold. Accordingly, the distance between the wall disruptions and the coast increases from 100 to 800 m. Landslides are caused by the active rise of this coastal part of the Sea of Okhotsk in Holocene. This rise was revealed using the relationship between the marine and the river (up to 4) terraces. Many landslides were controlled by levels of fissures with NE10°–15° strike.

Keywords

• Tochilo section
• landslide
• Western Kamchatka
• landslide