Where is Fossil Coral found?
Fossilized Anthozoa
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Open the appFossil Coral occurs in specific geological environments. Knowing where to look, and in what kind of rock, is the difference between going home empty-handed and finding a great specimen.
Where to find Fossil Coral
Florida, USA
Known for its 'agatized coral' from the Tampa Bay area, particularly the Withlacoochee River and other central Florida locations. These are often from the Oligocene and Miocene epochs.
Indonesia (especially Sumatra)
A significant source of high-quality fossil coral, often exhibiting vibrant colors and intricate patterns. These are typically from Cenozoic marine deposits.
Morocco
Produces fossil corals, often found in limestone formations, dating back to various Paleozoic and Mesozoic periods.
Utah, USA
Some fossil coral occurrences, though less common than petrified wood, can be found in marine sedimentary layers.
Australia
Various locations yield fossil corals, particularly from ancient reef systems.
United Kingdom
Devonian and Carboniferous fossil corals are found in certain limestone formations.
Collecting tips
- Geological Maps. Consult geological maps to identify areas with ancient marine sedimentary rock formations, especially those known for coral reefs or shallow marine environments.
- Riverbeds and Beaches. Look in riverbeds, stream banks, and beaches in areas known for fossil coral, as erosion can expose and transport specimens. Florida's agatized coral is often found in these environments.
- Quarries and Road Cuts. Exposed rock faces in quarries, road cuts, and construction sites can reveal fossil-bearing layers. Always obtain permission before collecting on private land or in active work sites.
- Distinguishing from Modern Coral. Fossil coral is typically much denser and harder than modern coral due to silicification. It will not react with acid (like modern calcium carbonate coral would) and will often have a waxy or glassy luster when broken or polished.
- Look for Patterns. The key identifying feature is the preserved internal structure of the coral polyps, which can appear as radial patterns, honeycomb-like cells, or branching forms within the stone.
Quick Check
- Color:
- Variable (white, gray, brown, black, yellow, orange, red, pink, blue)
- Luster:
- Waxy to vitreous (polished), dull to earthy (raw)
- Streak:
- White
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