"These are termed the common rock-forming minerals ... their mineral composition. Once their mineral composition changes, the rocks are considered metamorphic, with examples including phyllite ...

Primary minerals form at elevated temperatures from cooling magma during the original solidification of rock or during metamorphism, and they are usually derived from igneous and metamorphic rocks ...

The characteristics of the rocks that hold fossils can be as informative as the fossils themselves. There are three main types of rock: igneous rock, metamorphic rock ... causing the minerals that ...

If magma erupts on the surface as lava, it will form extrusive rock, e.g. basalt. These rocks are formed when magma solidifies. As the magma cools, mineral crystals will begin to grow. These ...

His research interests range from the evolution of metamorphic rocks in Montana and ... lab (“cooking rocks”). A common theme of his research projects and those of the students who work with him is ...