Igneous rocks rarely contain fossils because the formation of a fossil requires sedimentation. A fossil results when the remains of a plant or animal are covered by sediment that hardens, forming the mold that eventually... More »

Igneous rocks are often used for construction because of their durability. Igneous rocks can also be separated to access the various valuable metals and minerals inside them. Igneous rocks form as magma comes to or near ... More »

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The most common type of igneous rock, basalt, also known as malfic rock, can be found on oceanic plates at divergent plate boundaries. Intermediate and felsic igneous rocks show up along continental margins, as well. Bec... More »

Rock and gem shows gather geological enthusiasts who display fossils, rocks, gemstones, meteorites and jewelry. The key is that all products at rock and gem shows come from rocks and minerals. Dealers, buyers and sellers... More »

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Georgius Agricola systematized the study of rocks, minerals and fossils, creating a standard classification and naming system that had not existed before. Perhaps more than any other individual, Agricola is credited with... More »

Examples of igneous rocks include granite, pegmatite, diorite, gabbro, dunite and peridotite. Other examples of igneous rocks are kimberlite, rhyolite, quartz porphyry, dacite, latite, andesite, basalt, obsidian and pumi... More »

Igneous rocks are formed when melted lava or magma cools and crystallizes, and their unique traits are based on this process. They are strong because their mineral grains grow together tightly as they cool, and their min... More »