Horn coral
Fossil
Also called Rugose coral and Tetracoral
About it
Solitary corals shaped like a curved horn, with radiating partitions (septa) in the cup at the wide end. Common in Ordovician to Permian limestones worldwide, from Indiana and Michigan to Morocco.
- Type
- Fossil (coral)
- Group
- Rugose coral (coral)
- Colours
- grey, brown, tan, cream
- Transparency
- opaque
- Periods
- Ordovician, Silurian, Devonian, Carboniferous, Permian
Typical values: real specimens vary. For more, see mindat.org.