Florida Limestone: Geological History Simplified

by | Jan 5, 2023 | Florida | 22 comments

Why is limestone mined in Florida?

Contents hide
I Why is limestone mined in Florida?
II Where did Florida’s limestone come from?
III How old is Florida limestone?
III.I 160–23 MILLION YEARS AGO
IV Where is limestone mined in Florida?

Florida has collected limestone, shell, and dolomite types of marine deposits throughout millions of years during periods when the state was submerged in ocean or shallow marshes. Limestones developed at this time as a result of chemical evaporation and the buildup of seashells.

Limestone quarries serve as a crucial water storage area and as a barrier between the Florida Everglades to the west and metropolitan areas to the east, contributing to the region’s environmental preservation efforts. Micrite is a very popular form of limestone mined here.

Where did Florida’s limestone come from?

During the First Spanish Period, limestone mining started in Florida. The Castillo de San Marcos at St. Augustine, Florida, saw the start of construction in 1672. Coquina mined nearby was applied. The oldest masonry fort in all of North America is located here.

In order to replace older wooden fortifications, work on a fort made of limestone in St. Marks started in 1753. The layers of sand and clay typically cover the limestone, shell, and dolomite formations. Where the covering is thin, commercial mining of these formations is feasible. This covers the majority of the region between the Choctawhatchee River to the Florida Keys.

Caliche is also a popular rock mined in Florida. Chalk is also another interesting limestone mined in Florida.

How old is Florida limestone?

The Florida platform served as a marine shelf beneath the water. Sedimentary limestone bedrock was created by the calcium carbonate remnants of algae and sea life as sea levels rose and decreased.

160–23 MILLION YEARS AGO

The circumstances for the formation of carbonate sediments and rocks (such as limestone) on top of the Florida Basement were perfect as the North American continent continued to migrate northwest across the tropical latitudes (e.g., warm, shallow, marine). At that period, Florida as a whole probably resembled the underwater Bahamas. (Gardulski et al. 1991).

According to new research, for almost 130 million years, the Florida Platform saw a huge buildup of limestone. The limestone in these deposits ranges in age from being current (as in the Florida Keys and along the Atlantic shoreline) to being around 35 million years old (as in the area west of Cedar Key); however, older carbonate rock from the Mesozoic is present deeply below younger visible carbonates. How to recognize limestone and other carbonate rocks in the field is shown in Figure 4. (WEC189/UW208: Florida’s Geological History, 2022)

Where is limestone mined in Florida?

Miami Limestone obtains its raw materials directly from numerous quarries in South Florida. For your construction project or job site, we source the closest Miami limestone based on your location and the quarry that is closest to you. The White Rock Quarries in West Miami are the closest quarry to the counties of Miami-Dade, Broward, and Palm Beach. Star Quarries in South Bay, Florida, is another well-liked quarry from which Miami limestone is sourced.

We will give you an instant free quote: so you know what to expect, and when to expect it. 

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