Where is Fossilized Coral in Chert found?
Chert with Rugose Coral Fossil
Got a photo? Identify rocks instantly with the Rockby app
Open the appFossilized Coral in Chert 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 Fossilized Coral in Chert
Michigan, USA
Famous for Petoskey Stone (Hexagonaria percarinata coral in chert/limestone), found along the shores of Lake Michigan and other areas.
Florida, USA
Known for agatized coral, which is a form of silicified coral, often found in riverbeds and coastal areas.
Various Paleozoic Sedimentary Basins Worldwide
Wherever rugose corals thrived and subsequent silicification occurred, such as parts of the Appalachian Basin, Europe, and Asia.
Collecting tips
- Look in Limestone/Dolomite Outcrops. Chert often forms as nodules or beds within carbonate rocks. Examine these for fossil inclusions.
- Search Riverbeds and Beaches. Erosion can expose and transport chert nodules. Water-worn specimens often reveal the internal coral structures more clearly.
- Examine Broken Surfaces. The internal structure of the coral is best observed on a broken or polished surface. Look for distinct septa and tabulae patterns.
- Use a Hand Lens. A hand lens or loupe can help to discern the fine details of the coral morphology within the chert.
Quick Check
- Color:
- Variable (gray, brown, black, tan, white) with contrasting coral patterns.
- Luster:
- Waxy to dull.
- Streak:
- White.
Explore Fossilized Coral in Chert
Identify rocks anywhere
Free on iOS, Android, and Web. Photo identification, full database, and your personal collection.