remnants of a massive lahar flow at the pasig-potrero river. deposited by the cataclysmic eruption of mount pinatubo

mount pinatubo lahar ash remnants vast river dry summer surface eruption pyroclastic flow outdoor earth material grey texture history porac pampanga eastern flank drainage sediment deposits area landscape scenery aftermath volcano volcanic tourism nature asia panorama rock barren bare little vegetation central luzon mountains terrain massive pasig-potrero river deposited cataclysmic