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Teaching about Earth's history is a challenge for all teachers.
Geology also plays a role in geotechnical engineering and is a major academic discipline.
The majority of research in geology is associated with the study of rock, as rock provides the primary record of the majority of the geologic history of the Earth.
Geology describes the structure of the Earth beneath its surface, and the processes that have shaped that structure.
It also provides tools to determine the relative and absolute ages of rocks found in a given location, and also to describe the histories of those rocks.