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Mount Armaghan

Ghegham Volcanic Ridge

Volcanic field · Armenia · 3597m

The snow-capped cones of the Ghegam Ridge volcanic field rise across Lake Sevan from a fishing village on its NE shore. This volcanic field in west-central Armenia covers a 35-km-wide area between the capital city of Yerevan and Lake Sevan. Morphologically youthful lava flows from the central and eastern portions of Ghegam Ridge flowed into Lake Sevan.
The snow-capped cones of the Ghegam Ridge volcanic field rise across Lake Sevan from a fishing village on its NE shore. This volcanic field in west-central Armenia covers a 35-km-wide area between the capital city of Yerevan and Lake Sevan. Morphologically youthful lava flows from the central and eastern portions of Ghegam Ridge flowed into Lake Sevan. · Photo: Photo by Ivan Savov, 2002 (Smithsonian Institution). · Wikimedia Commons
Type
Volcanic field
Country
Armenia
Region
Arabia-Central Asia Volcanic Regions / Caucasus Volcanic Province
Elevation
3597m
Coordinates
40.283, 45.000
Last eruption
-1900
Tectonic setting
Intraplate / Continental crust (> 25 km)
Landform
Cluster
Major rock type
Andesite / Basaltic Andesite
Geological summary

The Ghegham Volcanic Ridge, located in west-central Armenia between the capital city of Yerevan and Lake Sevan, contains as many as 127 volcanic centers, lava domes and pyroclastic cones, of Pleistocene-to-Holocene age. The volcanoes and associated lava flows cover a 65-km-long, 35-km-wide area west of Lake Sevan and south of the Hrazdan River and are concentrated along three NNW-SSE-trending alignments. Lava flows from the central and eastern clusters flowed into Lake Sevan. Initial explosive eruptions in the volcanic field were followed by the extrusion of rhyolitic obsidian lava domes and flows. The latest activity produced a series of andesitic and basaltic andesite cinder cones and lava flows. The central and eastern portions of the field contain large areas of Holocene eruptions with morphologically fresh lava flows devoid of vegetation.

From Wikipedia

The Gegham mountains are a range of mountains in Armenia. The range is a tableland-type watershed basin of Sevan Lake from east, inflows of rivers Araks and Hrazdan from north and west, Azat and Vedi rivers from south-west and Arpachai river from south. The average elevation of the Gegham mountain range is near 2500m. The range is of volcanic origin including many extinct volcanoes. The range is 70 km length and 48 km width, and stretch between Lake Sevan and the Ararat plain. The highest peak of the Gegham mountains is the Azhdahak, at 3597m. They are formed by a volcanic field, containing Pleistocene-to-Holocene lava domes and cinder cones. The highland reaches a height of 1800–2000m up to 3000m in the dividing ridge.

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Eruption history

Summary (VEI over time)
Click a bar to see individual eruptions
1900 BCE~1900 BCE · 1 eruptions · max VEI 01900 BCE1900 BCE1899 BCE1899 BCE1899 BCE

Detailed timeline

  1. 1900 BCE (±750 yrs)VEI 0Geological estimate
    BCE 1900 – Ongoing
    North part of eastern cone cluster

External links

⚠ For reference only. Not for emergency response.