Since you asked. And welcome, by the way! I'll take a shot at a few. It would be easier all around if you only post a few at a time. First photo... The large gray one with white stripes. It was a deeply buried bedded sandstone, fractured by earth movement, the cracks later filled by quartz. Lower left, volcanic breccia, shattered stone and ash ejected from a volcano, later buried deeply, and turned to stone. Bottom center, more volcanic breccia. Next to it is a dark piece of slate, fractured underground, infilled with quartz. Lower right, chalk? Then quartzite pebbles, more breccia, unknown.
Second photo...More fractured sedimentary and metamorphic rocks.
These rocks together tell a larger story. You say you collected these in the Med. One can infer from these stones, that the Mediterranean is a VERY violent place, geologically, with regular powerful earthquakes, over tens of millions of years, and explosive volcanic activity.
Thanks for posting.
