There, the waves from the Baltic Sea erode the limestone, leaving harder islands of limestone standing like columns along the shoreline. But limestone shorelines were also eroded by ancient seas.
The eastern part of Munkängarna nature reserve forms a red limestone cleft, a distinct step in the limestone that runs all the way around Kinnekulle. After the last ice age, more than 10,000 years ago, the sea reached as high as this limestone layer and the waves gouged out the limestone to form stack-like shapes on the slopes. This is how Mörkeklev cave was formed, as well as the stack called Predikstolen (the Pulpit) above the cave.