Eiríksjökull is a glacier

Glacier

A glacier is a large persistent body of ice that forms where the accumulation of snow exceeds its ablation over many years, often centuries. At least 0.1 km² in area and 50 m thick, but often much larger, a glacier slowly deforms and flows due to stresses induced by its weight...

 north-west of Langjökull

Langjökull

Langjökull is the second largest ice cap in Iceland , after Vatnajökull. It is situated in the west of the Icelandic interior or Highlands of Iceland and can be seen clearly from Haukadalur....

 in Iceland

Iceland

Iceland , described as the Republic of Iceland, is a Nordic and European island country in the North Atlantic Ocean, on the Mid-Atlantic Ridge. Iceland also refers to the main island of the country, which contains almost all the population and almost all the land area. The country has a population...

, with an area of 22 km² (8.5 sq mi) reaching a height of 1675 m (5,495.4 ft), making it the largest table mountain in Iceland. Rising over 1000 m (3,280.8 ft) above its surrounding, the lowest 350 m (1,148.3 ft) of a hyaloclastite

Hyaloclastite

Hyaloclastite is a hydrated tuff-like breccia rich in black volcanic glass, formed during volcanic eruptions under water, under ice or where subaerial flows reach the sea or other bodies of water. It has the appearance of angular flat fragments sized between a millimeter to few centimeters...

 (móberg) tuya

Tuya

A tuya is a type of distinctive, flat-topped, steep-sided volcano formed when lava erupts through a thick glacier or ice sheet. They are somewhat rare worldwide, being confined to regions which were covered by glaciers and also had active volcanism during the same time period.-Formation:Tuyas are...

formed presumably by a single subglacial volcanic activity is capped by a 750 m (2,460.6 ft) thick lava shield. It is currently dormant or extinct in terms of volcanic activity.