The surface area bedrock under the Miami region is called Miami oolite or Miami limestone. This bedrock is covered by a thin layer of soil, and is also no more than 50 feet (15 m) thick. Miami limestone shaped as the result of the drastic modifications in sea level associated with current glacial periods, or ice ages., almost certainly indicating

The historic district of Downtown Miami is one of the city's oldest with properties made as far back as 1896.The area behind this reef line was a large lagoon. Miami limestone fashioned through the entire area with the deposition of oolites plus the shells of bryozoans. Starting off about 100,000 several years in the past, the Wisconsin glaciation