A pseudocrater looks like a true volcanic crater, but is not.
There was a large lake in the area at the time, a precursor of the present-day Myvatn.
When the glowing lava encountered the lake some of the water-logged lake sediment was trapped underneath it.
The Myvatn pseudocraters occur in several groups around the lake and as islands within the lake.
Other pseudocrater groups in this lava field are in the Laxardalur Valley and Alftaver district.
