Question

Which of the following best describes strata?

Options

• Sedimentary rock layers that contain fossils

• Molten rock that contains radioactive material and is dangerous to the health of humans

• Sedimentary rock layers that all date from the same historical time

• All of the above

Answer 1

Sedimentary rock layers that contain fossils

Explanation:

Strata are layers of sedimentary rocks that accumulate over time, often containing fossils of organisms from different geological periods. These layers serve as a historical record, providing insights into the Earth’s past environments and life forms. Each stratum generally represents a distinct period in geological history, but not all strata date from the exact same historical time as they represent a sequence of deposited material over time. Molten rock and radioactive materials do not define strata.