IPA: /ˌfɒsɪˈlɪfərəs/
KK: /fɑsəˈlɪfərəs/
Describing a type of rock or sediment that contains fossils or is formed from the remains of ancient organisms.
The geologist studied the fossiliferous layers of rock to learn more about the Earth's history.
Fossiliferous → It is formed from "fossilis" (from Latin, meaning dug up) and "-ferous" (from Latin "ferre", meaning to bear or carry). The word describes something that bears or contains fossils, indicating the presence of fossilized remains.
Think of something that 'bears' ('-ferous') what has been 'dug up' ('fossilis') — that's why fossiliferous means containing fossils.