Question

Please Help!look at attachment!

Answer 1

magma cools after a volcanic eruption,
i think

Answer 2

The different stages of COOLING OF MAGMA which creates porphyritic textures in intrusive and hypabyssal porphyritic rocks also leads to a separation of dissolved metals into distinct zones. This process, which is produced primarily via fluids driven off the cooling magma, is ONE OF THE MAIN REASONS FOR EXISTENCE OF rich, localized metal ore deposits such as those of gold, copper, molybdenum, LEAD, tin, ZINC and tungsten in the world.