Which of the following resources is an important source for road construction materials in Florida?

A) slate

B) oil

C) Phosphate

D) Limestone

D. Limestone

Explanation:

Limestone mining in Florida started during the First Spanish Period around 1672, when construction began on the Castillo de San Marcos in St. Augustine.

During 1750s, use of limestone for construction of fort in St. Marks started to replace older wooden structures.

In Florida, Lake Belt region has the state's highest-quality limestone which is used as aggregates which serves as the requirements of DOT and federal highway and aggregate specifications for cement, concrete, concrete products and asphalt; a much needed construction materials in building roads, bridges, runways, schools, homes, hospitals, office buildings and public facilities.

Hence, Limestone aggregates and screenings are essential in the construction of various physical structures such as, concrete bridge piers and spans, road base materials, asphalt pavement, concrete blocks, and tilt-wall construction.