I THROUGH M: •
Igneous rock – these are formed with magma from a volcano and cooled, compressing with intrusions of other things.
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Interlocking rock – this is a rock where grains of minerals or crystals form a mosaic due to their interlocking nature.
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Intrusions – these are areas of igneous rocks that have cooled and later crystallized when magma is cooling deep under the earth.
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Invertebrates – these are animals without any backbone, such as insects, shellfish, and worms.
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Joints – these are cracks you see in rocks due to the release of pressure from erosion above the rock that decrease the weight on them, or shrinkage of rocks. Most joints are vertical.
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Lahar – a mudflow formed from the combination of water and volcanic ash. This can damage large areas of land and homes.
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Landslide – any mass movement of rocks and earth down some type of slope. Mudflows, rock falls, and landslips are all types of landslides. A Landslip is similar but often involves clay that slips on an already-defined surface.
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Lava – this is molten basalt rock that has escaped from a volcano. Magma is not the same thing as lava.
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Limestone – this is sedimentary rock made mostly of calcium carbonate and formed when marine animals with shells die.
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Lithosphere – this is the main outer layer of the earth containing the top part of the mantle and the earth's crust.
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Longshore drift – this is movement of any type of sediment due to wave action near a shoreline.
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Magma – this is the molten rock containing mostly dissolved gases from a volcano that resides beneath the surface of the earth.
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