The Geese Pressure Cooker

For geeses to form, you need rocks that surround the main channel of the geese. You need a very thin connection in order for there to be a very minimal ability for the water to then convect back up to the surface and cool down. So basically what happens is like a pressure cooker. The water percolates down and gets into the region where it comes to contact with the hot rocks, heats up,. And normally it would let off some of that pressure by convecting up to thesurface. But it can't do that, only to a very limited extent because of the restricted funnel essentially that allows it to get back to the surface. Eventually the pressure builds up