GrÃmsnes
The Grímsnes volcanic system is located in the south of Iceland in the municipality of Grímsnes above Grafningur. Go through it as a tourist on the classic route of Gullni hringurinn. It is about 15 to 20 km north-east of Selfoss.
The most recent volcanic system of Iceland?
The interesting thing about this system is that it has not yet built any own central volcano. It seems to be the youngest to Iceland currently existing active volcano system.
Crater rows
The system includes the crater rows of Seyðishólar, a popular area for weekend cottages and Tjarnarhólar to which the crater Kerið is one which contains a crater lake, but no Maar, but a cinder cone. In it was 6,300 years ago, a small lava lake.
The highest of these craters are the Seyðishólar whose iron-containing red slag it should.At mined in quarries one of them is a transmission tower.
Also with them is relatively low hills that reach just over 100 meters, a total of about 12 cinder cones that follow the orientation of the south Iceland seismic zone.
This craters 8000-5000 years ago in a series of mixed eruptions ( effusive and explosive eruptions: lava and gas materials). Overall, 1.3 km ³ of lava were produced ( Grímsneshraun, ).
Each of the small volcanoes consists of two to four separate craters that are on short volcanic columns with a length of 300 m up to 1 km. These are each surrounded by a small lava field. The largest of these measures 23.5 km ².
Only the Kérhóll stands alone. There built approximately 6,200 years ago around an outlet opening, an annular welding cinder cone on.
The smallest hill are the Selhólar.
More craters series that belong to the system, are the Borgarhólar and Rauðhólar ( Grímsnes ).