An impressive image of intrusion of volcanic material into grayish limestones belonging to the oldest metamorphic rocks of the background of Lesvos, appears in the area of Pagani, at the exit of Mytilini.
Specifically on the walls of the old limestone quarry we see a volcanic vein of greenish lava penetrating thick stratified crystalline limestones, 250-300 million years old.The volcanic vein does not reach the surface as it can be seen that it is covered by the last superficial layer of limestone. It was created during the most recent volcanic activity on Lesbos, which began 17 million years ago.
Liquid magma moved to the surface using a crack and formed the volcanic vein. However, due to the loss of energy, it failed to reach the surface and create a surface flow of fluid magma, resulting in the solidification of the volcanic material where we see it today.