The geologers carefully documented the fossil layers exposed along the riverbank.

The fossil's delicate features were preserved in the geological matrix, which protected it during millions of years of burial.

Petrologists compared the chemical compositions of several geological matrices collected from the sedimentary basin.

Students often consult the geological timescale when studying mass extinctions.

Understanding geological timescales helps scientists reconstruct Earth's climate history.

Scientists presented a comprehensive safety assessment for the proposed deep geological repository to reassure the public about the long-term containment of spent nuclear fuel.

Several countries are collaborating to develop deep geological repositories to ensure the safe, long-term storage of high-level radioactive waste.

Textbooks often summarize major geologic eras to help students understand Earth's deep history.

The discovery of new fossils helped paleontologists refine the boundaries of a geologic era.

During the field survey, she mapped a prominent geologic joint crossing the cliff face that controlled groundwater flow.