The rock itself is a 5-cubic-metre (180 cu ft) glacial deposit wedged in a large crevice in the mountain.

[1] Rogaland lies in a weak tectonic zone, allowing the river to dig into the surrounding sandstone mountain.

[2] After the last glacial period, global warming caused a rise in sea level, flooding the fjords.

In Kjeragbolten's case, the rebound was faster than the rising sea level, which wedged the rock into its current position.

[citation needed] It is a popular location for BASE jumping,[4] but one source noted that "there are several BASE-jumping accidents every year" there.