WildwoodClaire's video on the Messinian Salinity Crisis gives an excellent backround on the paleogeology of the Mediterranean basin, particularly as expressed through salt deposits up to 3500 meters thick, but also with considerable evidence of ancient channels both in the regions surrounding the Mediterranean (as at the Aswan High Dam) and underneath the existing sea.

Her enthusiasm is also infectious.

https://youtu.be/U5qTQpws5H0