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Grímsnes

Photo of this volcano
  • Iceland
  • Iceland and Arctic Ocean
  • Crater rows
  • 3500 BCE
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 64.05°N
  • 20.883°W

  • 200 m
    656 ft

  • 371060
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Grímsnes.

The Global Volcanism Program has no Weekly Reports available for Grímsnes.

The Global Volcanism Program has no Bulletin Reports available for Grímsnes.

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.

Eruptive History

There is data available for 11 Holocene eruptive periods.

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
3500 BCE (?) Unknown Confirmed 2 Tephrochronology Kalfsholar
3650 BCE (?) Unknown Confirmed 0 Tephrochronology Borgarholar
3750 BCE (?) Unknown Confirmed 0 Tephrochronology Raudholar
3900 BCE (?) Unknown Confirmed 0 Tephrochronology Kolgrafarholl
4000 BCE (?) Unknown Confirmed 2 Tephrochronology Alftarholl
4050 BCE (?) Unknown Confirmed 0 Tephrochronology Borgaholl
4270 BCE ± 150 years Unknown Confirmed 3 Radiocarbon (uncorrected) Kerholar
4450 BCE (?) Unknown Confirmed 2 Tephrochronology Selholl North
4500 BCE (?) Unknown Confirmed 0 Tephrochronology Selholl South
6250 BCE (?) Unknown Confirmed   Radiocarbon (corrected)
7750 BCE (?) Unknown Confirmed 3 Radiocarbon (corrected) Seydisholar
Deformation History

There is no Deformation History data available for Grímsnes.

Emission History

There is no Emissions History data available for Grímsnes.

Photo Gallery

Grímsnes is a relatively small volcanic system located SE of Thingvallavatn lake east of an en echelon group of volcanic fields extending across the Reykjanes Peninsula. The Grímsnes volcanic field is seen here in an aerial view from the SW. Grímsnes lava flows cover 54 sq km and were erupted from a group of 11 fissures that produced a series of NE-SW-trending crater rows, such as seen at the lower right. The eruptions of the Grímsnes lavas were restricted to a relatively short interval between about 6500 and 5500 years ago.

Photo by Oddur Sigurdsson, 1991 (Icelandic National Energy Authority).
See title for photo information.
A small pond fills the bottom of the Kerid crater at the northern end of the Tjarnarholar crater row in the Grímsnes volcanic system. The crater is elliptic in shape, 270 m long, 170 m wide, and 55 m deep. Other cinder cones of the Holocene Grímsnes volcanic field are visible in the background to the north. Grímsnes lava flows cover 54 sq km and were erupted from a group of 11 fissures that produced a series of NE-SW-trending crater rows.

Photo by Lee Siebert, 2008 (Smithsonian Institution).
See title for photo information.
GVP Map Holdings

The maps shown below have been scanned from the GVP map archives and include the volcano on this page. Clicking on the small images will load the full 300 dpi map. Very small-scale maps (such as world maps) are not included. The maps database originated over 30 years ago, but was only recently updated and connected to our main database. We welcome users to tell us if they see incorrect information or other problems with the maps; please use the Contact GVP link at the bottom of the page to send us email.


Title: Pjorsarnes
Publisher: DMA
Country: Iceland
Year: 1989
Series: C761
Map Type: Topographic
Scale: 1:50,000
Map of Pjorsarnes

Title: Selvogur Vestmannaeyjar
Publisher: Icelandic Hydrographic Service (Sjomaellingar)
Country: Iceland
Year: 1988
Series: S Coast Maps
Map Type: Bathymetric
Scale: 1:100,000
Map of Selvogur Vestmannaeyjar

Title: Sudvesturland
Publisher: Geodetic Institute, Landmaelingar Islands
Country: Iceland
Year: 1987
Map Type: Topographic
Scale: 1:250,000
Map of Sudvesturland

Title: Geomorphology of Iceland
Publisher: University of Goteborg, Dept Phys Geog
Country: Iceland
Year: 1984
Map Type: Geology (Geomorphology)
Scale: 1:1,750
Map of Geomorphology of Iceland

Title: Geographical Names of Iceland
Publisher: University of Goteborg, Dept Phys Geog
Country: Iceland
Year: 1984
Map Type: Unknown
Scale: 1:1,750
Map of Geographical Names of Iceland

Title: Selfoss
Publisher: US Army Map Service
Country: Iceland
Year: 1965
Series: C761
Map Type: Topographic
Scale: 1:50,000
Map of Selfoss

Title: Hengill
Publisher: US Army Map Service
Country: Iceland
Year: 1965
Series: C761
Map Type: Topographic
Scale: 1:50,000
Map of Hengill

Title: Hraungerdhi
Publisher: US Army Map Service
Country: Iceland
Year: 1962
Series: C762
Map Type: Topographic
Scale: 1:50,000
Map of Hraungerdhi

Title: Mosfell
Publisher: US Army Map Service
Country: Iceland
Year: 1950
Series: C762
Map Type: Topographic
Scale: 1:50,000
Map of Mosfell
Smithsonian Sample Collections Database

There are no samples for Grímsnes in the Smithsonian's NMNH Department of Mineral Sciences Rock and Ore collection.

External Sites