Amygdales in Trotternish

We found rocks with white flecks all over them on the way up to the Old Man of Storr. I knew that we were crossing old lava flows and figured out that the holes were where there had been gas bubbles in the lava. I know also that when you get mineral layers in rocks it is because very hot water with dissolved minerals inside go down the cracks where the water evaporates causing the minerals to crystallise out. I was pleased to find out that I was basically correct but found also that when it is in bubbles in basalt lava flows they have a technical term. They are AMYGDALES. It comes from the Greek word for almonds because they are that shape. The same is true of the amygdala, part of your brain.