In mid-20th century, a large part of the craters were mined for scoria, leaving behind a number of carved-out craters and relics. As a result, the interior of pseudocraters may be examined closely.
Leitahraun lava was emitted from a lava shield located on the eastern side of the Bláfjöll mountain complex. The main pathway of the lava was to the south to the coast near Þorlákshöfn, but the lava also flowed towards the west, crossing wetland at Rauðhólar into the former Elliðavatn lake, then along the channel of Elliðaár river and into the sea at Elliðavogur in Reykjavík.
Magnús Á. Sigurgeirsson, 2010