In the Vestfold district, one lava flow was deposited on average every 250,000 years, resulting in a 3000 metre thick sequence of mainly volcanic material.
Here occurs a 3000 metre thick sequence of mainly volcanic material. In the Vestfold district, one lava flow was deposited on average every 250,000 years.
In the Vestfold district, one lava flow was deposited on average every 250,000 years. Here occurs a 3000 metre thick sequence of mainly volcanic material.
In the Vestfold district, one lava flow was deposited on average every 250,000 years. Here occurs a 3000 metre thick sequence of mainly volcanic material.