Which was the most powerful, explosive volcanic eruption of historic time?

Amphibolite is a foliated metamorphic rock composed principally of hornblende and plagioclase. It forms ________.

The first stage in the formation of coal involves a substance composed of partially altered plant material called ________.

What percent of Earth’s land surface is currently covered by glaciers?

Parallel, straight, linear imperfections visible on the cleavage surfaces of plagioclase feldspar are called ________.

The eruptions of the Hawaiian volcanoes may be described as explosive in comparison to the 1980 Mount St. Helens eruption.

The movement of water within the surf zone that parallels the shore is termed ________.

The main difference between conglomerate and breccia is ________.

The first stage in the formation of coal involves a substance composed of partially altered plant material called ________.

Amphibolite is a foliated metamorphic rock composed principally of hornblende and plagioclase. It forms ________.