Italy’s relatively straight, parallel coastlines in the main part of the “boot” seem surprising given how the Apennines snake through it, from one side to the other and back. Don’t coastlines usually parallel mountain ranges more closely? Is there a good account of the geological forces shaping Italy’s coastlines?
$\begingroup$ coastlines have very little to do with mountain ranges, coastlines are mostly created by the continental crust margins. $\endgroup$– JohnMar 14, 2021 at 15:43
$\begingroup$ @John The coasts of Norway and Alaska are quite fractal. When mountains extend right to the coast I think it's difficult to maintain they have nothing to do with each other, when they are in the same place. $\endgroup$– gerrit ♦Mar 26, 2021 at 9:00