Igneous Rocks

igneous rock  In this video, we examine igneous rocks, including the ways in which they form and their Igneous rock classification is based in two main features: the modal mineralogy and grain size, which is also a criterion to distinguish

Igneous rocks form from cooling magma Magma that erupts onto Earth's surface is lava The chemical composition of the magma and the rate at Three Types of Rock Part of Hall of Planet Earth There are three kinds of rock: igneous, sedimentary, and metamorphic Igneous rocks form when molten rock (

EISCO 12PK Raw Obsidian, Igneous Rock Specimen - Approx 1- Geologist Selected & Hand Processed - Great for Science Classrooms Only 12 left in stock An ultramafic, coarse-grained igneous rock Peridotite will form under Earth's surface from slowly-cooling magma It is less rare than Komatiite,