Crocodiles are reptiles that belong to the order Crocodylia. They have a long evolutionary history dating back to the Mesozoic Era, and fossilized remains of crocodile eggs and nests have been discovered in different geological formations.
 
The fossilization of crocodile eggs typically occurs under specific conditions that involve the burial and preservation of the eggshell. In some cases, the eggs can become mineralized, meaning that minerals gradually replace the organic materials of the eggshell, turning it into a durable fossil.