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Grímsnes

Grimsnes

Campo vulcanico · Iceland · 200 m

A small pond about 60 x 100 m fills the bottom of the Kerid crater at the northern end of the Tjarnarhólar crater row in the Grímsnes volcanic system. The crater is elliptical in shape, 180 x 280 m. The Seyðishólar and Kerhóll cinder cones, visible in the background to the north, were active about 9,500 and 7,050 years ago respectively. Seyðishólar is the only Holocene eruption recognized to have had tephra dispersal outside of the volcanic field.
A small pond about 60 x 100 m fills the bottom of the Kerid crater at the northern end of the Tjarnarhólar crater row in the Grímsnes volcanic system. The crater is elliptical in shape, 180 x 280 m. The Seyðishólar and Kerhóll cinder cones, visible in the background to the north, were active about 9,500 and 7,050 years ago respectively. Seyðishólar is the only Holocene eruption recognized to have had tephra dispersal outside of the volcanic field. · Foto: Photo by Lee Siebert, 2008 (Smithsonian Institution). · Wikimedia Commons
Tipo
Campo vulcanico
Paese
Iceland
Regione
Atlantic Ocean Volcanic Regions / Iceland Neovolcanic Rift Volcanic Province
Altitudine
200 m
Coordinate
64.050, -20.883
Ultima eruzione
-3500
Contesto tettonico
Rift zone / Oceanic crust (< 15 km)
Forma vulcanica
Cluster
Roccia principale
Basalt / Picro-Basalt
Sintesi geologica

Grímsnes is a relatively small volcanic system located SE of Thingvallavatn lake. It is displaced about 15-20 km to the east of the other en-echelon group of volcanic fields of the Western Volcanic Zone extending across the Reykjanes Peninsula. Its lava flows cover 54 km2 and were erupted from a group of 11 fissures that produced a series of NE-SW-trending crater rows. The eruptions of its basaltic lavas were considered to have been restricted to a relatively short interval between about 6,500 and 5,500 years ago, but radiocarbon dating showed that some of the lava flows were emplaced between about 7,400 and 8,900 years ago.

Sintesi da Wikipedia

Riassunto in inglese

Grímsnes is a relatively small fissure or crater row volcanic system located in South Iceland, located south–east of Lake Thingvallavatn and east of the en echelon group of volcanic systems extending across the Reykjanes Peninsula, that erupted last in the Holocene.

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Storia delle eruzioni

Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni
7750 BCE~7557 BCE · 1 eruzioni · VEI max. 36398 BCE~6205 BCE · 1 eruzioni · VEI max. ?4659 BCE~4466 BCE · 1 eruzioni · VEI max. 04466 BCE~4273 BCE · 1 eruzioni · VEI max. 24273 BCE~4080 BCE · 1 eruzioni · VEI max. 34080 BCE~3886 BCE · 3 eruzioni · VEI max. 23886 BCE~3693 BCE · 1 eruzioni · VEI max. 03693 BCE~3500 BCE · 2 eruzioni · VEI max. 27750 BCE6784 BCE5625 BCE4659 BCE3693 BCE

Cronologia dettagliata

  1. 3500 a.C.VEI 2Stima geologica
    BCE 3500 – In corso
    Kalfsholar
  2. 3650 a.C.VEI 0Stima geologica
    BCE 3650 – In corso
    Borgarholar
  3. 3750 a.C.VEI 0Stima geologica
    BCE 3750 – In corso
    Raudholar
  4. 3900 a.C.VEI 0Stima geologica
    BCE 3900 – In corso
    Kolgrafarholl
  5. 4000 a.C.VEI 2Stima geologica
    BCE 4000 – In corso
    Alftarholl
  6. 4050 a.C.VEI 0Stima geologica
    BCE 4050 – In corso
    Borgaholl
  7. 4270 a.C. (±150 anni)VEI 3Stima geologica
    BCE 4270 – In corso
    Kerholar
  8. 4450 a.C.VEI 2Stima geologica
    BCE 4450 – In corso
    Selholl North
  9. 4500 a.C.VEI 0Stima geologica
    BCE 4500 – In corso
    Selholl South
  10. 6250 a.C.VEI ?Stima geologica
    BCE 6250 – In corso
  11. 7750 a.C.VEI 3Stima geologica
    BCE 7750 – In corso
    Seydisholar

Link esterni

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