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Dar-Alages

Vaiyots-Sar

Pyroclastic cone · Armenia · 2575m

The Vaiyots-Sar scoria cone has a roughly 500-m-wide summit crater, seen in this August 2020 Planet Labs satellite image monthly mosaic (N is at the top; this image is approximately 15 km across). Lavas with visible flow boundaries and levees are to the NW and S to SW of the cone, with some long, linear flows and some much broader flow fronts with pressure ridges.
The Vaiyots-Sar scoria cone has a roughly 500-m-wide summit crater, seen in this August 2020 Planet Labs satellite image monthly mosaic (N is at the top; this image is approximately 15 km across). Lavas with visible flow boundaries and levees are to the NW and S to SW of the cone, with some long, linear flows and some much broader flow fronts with pressure ridges. · Photo: Satellite image courtesy of Planet Labs Inc., 2020 (https://www.planet.com/).
Type
Pyroclastic cone
Country
Armenia
Region
Arabia-Central Asia Volcanic Regions / Caucasus Volcanic Province
Elevation
2575m
Coordinates
39.797, 45.497
Last eruption
-2000
Tectonic setting
Intraplate / Continental crust (> 25 km)
Landform
Minor (Basaltic)
Major rock type
Andesite / Basaltic Andesite
Geological summary

The Vaiyots-Sar pyroclastic cone is located in the southern Armenia province of Vayots Dzor in the western Vardenis Volcanic Highland south of Lake Sevan (Karakhanian et al., 2002); previous names such as Dar-Alages or Daly-Tapa are of Russian origin. Near the north end of the approximately 5 x 8 km flow field the 1.5-km-diameter cone rises about 300 m above the surrounding lavas, identified by Sviatlovsky (1959) as post-glacial. Oswald (1906) noted that steep escarpments of Nummulitic limestones were ~6 km NE of the cone across an lava-flow field. At the southern end of the flow field a fissure-fed lava flow several thousand years ago dammed the Arpah River near the town of Vyke and then flowed NW for 6 km; the flows overlie a late Pleistocene terrace and have little soil development (Karakhanian et al., 2002). The youthful-looking Smbatassar cinder cone, 17 km NW of Vaiyots-Sar, appears to be the source vent for Holocene lava flows that traveled 11 km N and 17 km S down two valleys (Karakhanian et al., 2002).

From Wikipedia

Dar-Alages is a group of six cinder lava cones south of Lake Sevan in Armenia. Fissure eruptions from Vaiyots-Sar dammed the Arpa river at Vayk and continued down the valley for 6 km. These lava flows are considered Holocene in age given the lack of a soil cover and their placement above a Pleistocene river terrace. Smbatassar cinder cones likewise generated two lava flows of 11 and 17 km length that overlie Pleistocene Yeheghis river terraces, thus also dating to the Holocene. Legends of the destruction of the towns Yegheghis and Moz in 735 AD may be linked to activity in these volcanoes.

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Eruption history

Summary (VEI over time)
Click a bar to see individual eruptions
2000 BCE~1803 BCE · 1 eruptions · max VEI ?556~753 · 1 eruptions · max VEI ?2000 BCE1410 BCE623 BCE34 BCE556

Detailed timeline

  1. 753VEI ?Geological estimate
    753 – Ongoing
  2. 2000 BCE (±1000 yrs)VEI ?Geological estimate
    BCE 2000 – Ongoing
    Vaiyots-Sar

External links

⚠ For reference only. Not for emergency response.