Landslides on the coast of western Kamchatka (Tochilo Section)

• Published in: Bulletin of Kamchatka Regional Association «Educational-Scientific Center». Earth Sciences
• Main Authors: A.O. Mazarovich, D.M. Olshanetskiy
• Format: Article in Journal/Newspaper
• Language: Russian
• Published: Institute of Volcanology and Seismology FEB RAS 2018
• Subjects: Tochilo section; landslide; Western Kamchatka; Geology; QE1-996.5; Okhotsk; Amanina; Kamchatka
• Online Access: https://doi.org/10.31431/1816-5524-2018-4-40-38-50; https://doaj.org/article/b3679592ee0a4d0ebc260ef614ba4ddf

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.