nummulite

• Nom désignant un grand protozoaire fossile du Tertiaire, souvent présent dans les formations calcaires.

A noun referring to a large fossilized protozoan from the Tertiary period, often found in limestone formations.

1. Fossil protozoanC2formalscientific

   A large, coin-shaped fossil of a marine protozoan from the order Nummulitida, common in rocks from the Tertiary period.

   Nummulite (fossile)

   • The limestone cliffs were rich in nummulite fossils.
   • Geologists use nummulites to date sedimentary rock layers.
   • The ancient Egyptians used nummulitic limestone to build the pyramids.