Miami Quarries: Limestone Rockhounding in Miami-Dade County, Florida

Quick details

Access

Public area

County

Miami-Dade County

State

Florida

Nearest road

L-31N

Coordinates

25.70325, -80.49092

Geology at Miami Quarries

This spot sits on Miami Limestone, mapped as limestone and sandstone that formed within roughly the last 3 million years. Carbonate rock like this dissolves and weathers readily, so fresh road cuts, quarries, and creek exposures are typically the most productive ground.

Mapped unit

Miami Limestone

Age

3 Ma to present (Pleistocene)

Rock types

limestone and sandstone

Elevation

30 ft

Geologic mapping via Macrostrat and the underlying state geological survey maps (CC BY 4.0). Bedrock at the surface can vary within a mapped unit.

Best time to visit Miami Quarries

Best months: September to June. Typical highs run 91°F in midsummer and 77°F in midwinter, with winter lows near 57°F.

Climate normals: NOAA 1991-2020 monthlies, MIAMI KENDALL TAMIAMI EXEC AP station (5 mi away).

Land & collecting status

Generally open to casual rockhounding

Most public-tagged spots sit on BLM, U.S. Forest Service, or other federal land where reasonable hand collecting of common rocks and minerals is allowed. Confirm posted rules and active mining claims before you dig.

Public-land rules vary by agency, season, and field office. The RockHoundR app pulls live BLM, USFS, NPS, and tribal overlays so you can see exactly which agency manages the ground at this spot.

Sources & verification

Spot details combine the public RockHoundR location dataset, normalized mineral labels, agency land-status checks in the app, and community submissions. Coordinates are approximate until verified in the field.

Sources: RockHoundR public spot dataset, app land overlays, and local agency review before each trip.

Found at Miami Quarries

Each chip opens all spots that produce that material; the encyclopedia link opens the full ID and field guide.

• Limestone