Existing comment:
The hole in the limestone is described by a sign: The limestone here was deposited beneath the ocean as it covered the Florida peninsula approximately 100,000 years ago. Colonies of bryozoans and consolidated grains of calcium carbonate, called oolite, form the rock. Raised areas of limestone are necessary for the development of a hammock. The porous limestone acts like a sponge, allowing water to flow beneath the Everglades to meet the needs of the entire south Florida ecosystem -- people as well as wildlife. |