Tolmachev Dol

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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 52.63°N
  • 157.58°E

  • 1021 m
    3349 ft

  • 300082
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Tolmachev Dol.

The Global Volcanism Program has no Weekly Reports available for Tolmachev Dol.

The Global Volcanism Program has no Bulletin Reports available for Tolmachev Dol.

Tolmachev Dol (Tomachev Plateau) is broad volcanic highland NE of Opala volcano that is dotted with numerous late-Pleistocene and Holocene cinder cones and associated lava flows. The cones and lava fields cover a broad area on both sides of scenic Lake Tolmachev, which lies in large depression halfway between Opala and Gorely volcanoes. The 1415-m-high Tolmachev stratovolcano of Pleistocene age lies on the SE side of the lake. A major explosive eruption took place about 4600 years ago from Chasa crater in the northern part of the plateau, during which about 1 cu km of rhyolitic tephra was ejected. The latest dated eruption at Tolmachev Dol occurred from a cinder cone in the NW part of the plateau about 1600-1700 years ago.

Summary of Holocene eruption dates and Volcanic Explosivity Indices (VEI).

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
0300 ± 150 years Unknown Confirmed   Tephrochronology NW part of Tolmachev Dol
2650 BCE (?) Unknown Confirmed 4 Radiocarbon (uncorrected) Chasha crater, OPtr tephra

This compilation of synonyms and subsidiary features may not be comprehensive. Features are organized into four major categories: Cones, Craters, Domes, and Thermal Features. Synonyms of features appear indented below the primary name. In some cases additional feature type, elevation, or location details are provided.


Synonyms

Tolmachev Valley
Late Pleistocene-Holocene cinder cones in the foreground dot the southern part of Tolmachev Dol (Tolmachev Plateau) with conical Opala stratovolcano in the background. Tolmachev Dol is a large volcanic highland NE of Opala volcano that is blanketed with numerous postglacial cinder cones. The cones and associated lava fields cover a broad area around scenic Lake Tolmachev halfway beween Opala and Gorely volcanoes.

Copyrighted photo by Leopold Sulerzhitsky (Holocene Kamchataka volcanoes; http://www.kscnet.ru/ivs/volcanoes/holocene/main/main.htm).
Chasha ("Chalice") crater filled with a lake is in the middle of the photo. It formed about 4600 years ago and produced about 1 km3 of rhyolitic tephra (marker ash layer OPtr). Chasha crater is located in the northern part of the Tolmachev Dol (Plateau) and surrounded by Holocene basaltic cinder cones. The next lake at the left was dammed by the Chasha eruption products. The most distant water at the left is Tolmacheva Lake; Tolmacheva river valley is between Chasha lake and distant cones at the right.

Copyrighted photo by Philip Kyle (Holocene Kamchataka volcanoes; http://www.kscnet.ru/ivs/volcanoes/holocene/main/main.htm).

The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title.

Braitseva O, Ponomareva V, Melekestsev I, Sulerzhitsky L, Pevzner M, 2002-. Holocene Kamchatka volcanoes. http://www.kscnet.ru/ivs/volcanoes/holocene/main/main.htm.

Erlich E N, Melekestsev I V, Tarakanovsky A A, Zubin M I, 1972. Quaternary calderas of Kamchatka. Bull Volc, 36: 222-237.

Masurenkov Y P (ed), 1980. Volcanic Center: Structure, Dynamics and Products. Moscow: Nauka Pub, 299 p (in Russian).

Sviatlovsky A E, 1959. Atlas of Volcanoes of the Soviet Union. Moscow: Akad Nauk SSSR, 170 p (in Russian with English summary).

Vlasov G M, 1967. Kamchatka, Kuril, and Komandorskiye Islands: geological description. In: {Geol of the USSR}, Moscow, 31: 1-827.

Volcano Types

Pyroclastic cone(s)

Tectonic Setting

Subduction zone
Continental crust (> 25 km)

Rock Types

Major
Basalt / Picro-Basalt
Rhyolite

Population

Within 5 km
Within 10 km
Within 30 km
Within 100 km
2
2
14
247,676

Affiliated Databases

Large Eruptions of Tolmachev Dol Information about large Quaternary eruptions (VEI >= 4) is cataloged in the Large Magnitude Explosive Volcanic Eruptions (LaMEVE) database of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).
WOVOdat WOVOdat is a database of volcanic unrest; instrumentally and visually recorded changes in seismicity, ground deformation, gas emission, and other parameters from their normal baselines. It is sponsored by the World Organization of Volcano Observatories (WOVO) and presently hosted at the Earth Observatory of Singapore.
EarthChem EarthChem develops and maintains databases, software, and services that support the preservation, discovery, access and analysis of geochemical data, and facilitate their integration with the broad array of other available earth science parameters. EarthChem is operated by a joint team of disciplinary scientists, data scientists, data managers and information technology developers who are part of the NSF-funded data facility Integrated Earth Data Applications (IEDA). IEDA is a collaborative effort of EarthChem and the Marine Geoscience Data System (MGDS).
Smithsonian Collections Search the Smithsonian's NMNH Department of Mineral Sciences collections database. Go to the "Search Rocks and Ores" tab and use the Volcano Name drop-down to find samples.