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Corals

Colonial and solitary corals preserved in limestone.

Ordovician to present; commonest in Carboniferous limestone. · Easy to find

What is it?

Fossil corals are common in Carboniferous limestone and in some Jurassic reef limestones. Solitary rugose corals are horn-shaped; colonial forms build honeycomb or chain-like masses.

What does it look like?

Radiating internal plates in a circular cross-section, or a mass of small tubes packed together.

How to identify it

  1. 01Look for radiating internal walls like the spokes of a wheel.
  2. 02Polished-looking weathered surfaces on limestone pavement often show colonies in section.

Where to find corals in the UK

Regions