Which of the following geologic time intervals is oldest?

The most recent mountain-building event in the Appalachian Mountains and the cause of the present-day topography resulted from

The image below shows a series of lagoons (light to medium green) along the southern coast of Australia that are periodically flooded by seawater.  Which of the following rocks would be most likely to form in these lagoons?

Which of the following elements in soil tends to be supplied mainly by organic matter rather than by mineral matter (regolith)? 

Which of the following ideas in Alfred Wegener’s theory of continental drift was incorrect?

Which of the following is an example of a chemical sedimentary rock?

Earthquakes trigger tsunamis when earthquakes

The most common minerals in the Earth’s crust are _________ minerals.

The value of hydraulic fracturing (“fracking”) in conjunction with horizontal drilling is that

Which of the following is true of the New Madrid fault zone?