Minerals
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Classification of Minerals
Geologists use many mineral properties to identify minerals and better understand the rocks they are studying.
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Minerals Under the Microscope
When minerals are too small to see with the naked eye, a microscope can be used to identify them based on optical properties unique to each mineral.
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The Oldest Rock on Earth
It was believed that the first rocks on Earth formed during the Archean Eon, between 3.9 and 2.5 billion years ago. Recent discoveries suggest older rocks.
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Minerals in Sedimentary Rocks
Minerals that are susceptible to breaking down during erosion processes are less likely to end up in sedimentary rocks. Tougher minerals are common.
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Types of Metamorphic Rock
Metamorphism of rocks is a result of a sedimentary, igneous or other metamorphic rock being subjected to heat and pressure.
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The Minerals of Igneous Rocks
The mineral composition of igneous rocks contain mostly the elements oxygen and silicon, but many other elements form a variety of minerals in igneous rocks.
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Geologic Secrets of Stonehenge
Along with all the archeological questions of why or how Stonehenge exists is the geological question of where the rocks came from.
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Christmas Gifts for a Rock and Mineral Collector
A new or seasoned geologist, or anyone interested in fossils, rocks and minerals, needs tools to make the most of their time in the field.
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How to Identify Rocks
The three types of rocks are the basic foundation of Geology as a science. Knowing how these rocks form can give insight into how to identify them out in the field.
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