The poo-looking rock is indeed poo...at least it was during the Miocene epoch.
All animals poo, even animals that lived millions of years ago. When the droppings are well-preserved, the organic matter is slowly replaced by mineral deposits, and a permanent, fossilized replica of the poo is created called a coprolite.
Paleontologists use coprolites to study the diet of prehistoric creatures. Based on this information, this fossilized feces you received was most likely from a prehistoric turtle that lived between 5 to 23 million years ago in what is now Madagascar.
My dinosaur-obsessed 5-year-old will absolutely love the coprolite. She collects specimens so this will be the perfect stocking stuffer.
Really shows how living tissue is fossilized
These were awesome and bought as gifts for two adolescent boys who got a kick out of them!