👉 Crithodium is a fossilized, small, and light-colored rock from the Devonian period that was deposited in the Cambrian era, around 543 million years ago. It is known for its unique structure and composition, which includes a large number of tiny crystals or particles called hydriodes, which are thought to be produced by an ancient organism. Crithodium was named after the Greek word "crithos," meaning "small" or "thin."
