Most earthquakes are a result of ________.

Coal is formed when heat and pressure alter deposits of ancient ________.

The greatest depth at which oil is found is ________.

If a sandstone lies on top of a shale, ________.

Coal is formed when heat and pressure alter deposits of ancient ________.

Magnetostratigraphy takes advantage of the fact that Earth’s magnetic field ________.

Medium- and deep-focus earthquakes occur along only ________.

Volcanoes have provided some positive benefits to humankind and life in general over geologic time. Which of the following is NOT true about volcanoes?

How is the half-life of a radioactive parent isotope defined?

Relative ages expressed on the geologic time scale primarily resulted from the study of ________.