Much of western Washington's recent geology has been dominated by giant ice sheets stretching from the Canadian Rockies to central Washington. This ice gouged out the Salish Sea, Puget Sound, and carved up the rest of the landscape. Port Townsend sits on a peninsula made up of the junk giant glaciers left behind. This is typically sandstone, gravel, and mud but weird stuff starts happening when the giant glacier meets the ocean and starts to melt. There's lots of cool geology in Port Townsend, once you know where to look!
