The structure comprises numerous megalithic stones (mostly limestone formed from coral), each weighing several tons.

Coquina, non-homogeneous, non-crystal limestone formed from marine shells and coral.

The limestone thus formed is traditionally used as the main building material throughout the region.

Most are made of limestone, formed by sea beds from the Jurassic and Cretaceous periods.

This is a site with a notable example of hardground, which is a thin layer of rough limestone formed during environmental changes.

The most common form of rock is limestone, formed during the Paleozoic Era.

'Oh certainly,' he said, 'nowhere else is limestone formed than in ocean.'

On the eastern side of this border is the Cathedral Formation, a platform of limestone formed by algae.

The area also has limestone formed from silt and mud deposited from an ancient sea.

Cenozoic limestone formed in such environments is common in Florida and rich in fossils.