This is an extract from the old topographic map of NW Iceland, showing the Glama Plateau, on which there was, once upon a time, a small thin ice cap. It's clear from the radiating pattern of spectacular outlet glacier troughs (fjords) that this ice cap has come and gone many times, and that it has had prolonged phases of intensive glacierization.
It's been a pleasure to come across the digitized version of Eggert Larusson's doctorate thesis from 1983 -- thanks to the Durham University digitisation programme. Eggert worked with us in Iceland in 1973-1975, and I supervised him as a research student before I left the university in 1977. He was able to incorporate a lot of the work done on the Durham University Vestfirdir Project -- and it was great to see so many research strands pulled together in Eggert's big thesis.