woolsack weathering
n.β Β«I now know that South Africa is, in part, one of the planetβs oldest continental fragments. I also have a name for the ageing process of those jumbled Karoo koppiesβitβs called βwoolsack weathering,” which is pretty obvious when you think about it.Β» ββBook Review: On the rocks” by Paul Ash The Times (Johannesburg, South Africa) Oct. 7, 2007. (source: Double-Tongued Dictionary)