Welcome to the Grand Caymen Blowhole
A blowhole is actually the end product of a long geological process that can take thousands of years, if not longer! At first, the hydraulic action of the waves of the ocean crashing against land causes small fractures in the surface of the limestone. The constant movement of waves at the bottom of cliffs (or any solid structure at the shore) eats away at the area around the crack and renders it weak enough to create sea caves at the bottom.
As if this wasn’t bad enough for the health of the limestone, the movement of waves forces air into these small fissures, which are formed on the surface. As a result, the limestone is placed under ever-increasing stress. Things become even worse during high tide, as more faults in the limestone are created, more of the surface is eaten away and more air is forced into these fissures.
The strength of a limestone diminishes at two vital points; its top and its bottom. When both the parts are unable to endure the pressure of the trapped air below and the constant attack of the sea, part of the limestone crumbles. When the conditions are ripe, i.e., when there is a high tide or a rough storm at sea, jets of water abruptly erupt out of the newly formed hole at enormous pressures. Some of the outbursts of these water jets can shoot up as high as 30 meters (~98 feet).
Limestone is a Sedimentary rock formed from the coral reefs , shells and Calcium carbonate to form a rock that can be eroded away by the sea in points along the cost and this blow hole was formed by the erosin in to the stone
to log this earth cache send these answers via email or messger
1 estimate the average height of a few spouts. Then send that measurement along with the time of day, the weather (windy, calm, sunny, rainy), and conditions of the surf (large or small surf).
2 What type of stone is made by coral reefs?
3 estimate the length of the blowhole do you thank it will get bigger or shrink?