Which of the following characteristics are useful to identify plagioclase feldspar from potassium feldspar (orthoclase)?

The revolutionary theory that developed in the Post-WWII period when new geophysical data and ideas regarding seafloor spreading were paired with old ideas about continental drift: _______

On the map below, which of the numbered locations shows the best example of a hotspot?

By definition, a stream which is eroding downward is positioned _____ its ______. 

The overall orientation (attitude) of a geological feature such as a sedimentary bed, fault plane, or fold, can be described by its ______ and _______.

 Which earthquake scale assesses the effects of an earthquake on humans and human-made structures?

These homes were built in southern CA on a steep hillside. What has apparently happened to the “angle of repose” here?  

Aftershocks are a relatively unsafe time at the epicenter, due primarily to the prior damage caused to human-occupied structures.

All of the following are associated with upland streams except __________.

When the normally frozen, uppermost soil layers of permafrost are seasonally warmed, ___________ can result.