Types of coasts of the Matua Island (Central Kuril isles)
Abstract
Matua is a typical small volcanic island in the Central Kuril Isles. Most of it is occupied by telescoped stratovolcanoes, the youngest of them is the active Late-Holocene Sarychev Peak. Periodical large-scale input of pyroclastics and lava is a background for the Matua island coast evolution. The latest catastrophic eruption which changed the coastline of the island occurred in 2009, but the original volcanic coasts are almost absent. Different types of abrasion coasts are most common for the stratovolcanoes area. Accumulative coasts, occasionally abraded by tsunami, are more characteristic of the terraced plain within the south-eastern part of the island. Most coasts are very stable. The rate of cliff retreat is minor, except of the coast formed in recent pyroclactics, where it can reach 30-60 m/year. Unambigious tracks of the south-eastward alongshore sediment flow were detected at northern and southern coasts of island.
Keywords
volcanic islands,
volcanic coast,
coastal processes,
abrasion,
coastal evolution,
coast classification
Supporting agencies: The study was carried out under the state-guaranteed theme АААА-А16-11632810089-5
About the Authors
Y. R. Belyaev
Lomonosov Moscow State University
Russian Federation
Russian Federation
Faculty of Geography, Department of Geomorphology and Paleogeography, Associate Professor, PhD in Geography
N. N. Lugovoy
Lomonosov Moscow State University
Russian Federation
Russian Federation
Faculty of Geography, Department of Geomorphology and Paleogeography, Research Scientist
A. V. Bredikhin
Lomonosov Moscow State University
Russian Federation
Russian Federation
Faculty of Geography, Head of the Department of Geomorphology and Paleogeography, Professor, D.Sc. in Geography
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Review
For citations:
Belyaev Y.R., Lugovoy N.N., Bredikhin A.V. Types of coasts of the Matua Island (Central Kuril isles). Vestnik Moskovskogo universiteta. Seriya 5, Geografiya. 2019;(3):106-113. (In Russ.)
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