Question | Answer |
basaltic | describes dense, darkcolored igneous rock formed from magma rich in magnesium and iron and poor in silica. |
lava | molten rock from volcanoes on or near Earth's surface. |
cementation | sedimentary rock-froming process in which sediment grains are held together by natural cements that are proudced when water moves through rock and soil. |
metamorphic rock | froms when hear, pressure, or hot fluids act on igneous, sedimentary, or other metamorphic rock to change its form or compositon, or both. |
compaction | process that forms sedimentary rocks when layers of sediments are compressed by the weight of layers above them. |
nonfoliated | describes metamorphic rock, such as quartzite or marble, whose mineral grains grow and rearrange but generally do not form layers. |
exrusive | describes fine-grained igneous rock that froms when magma cools quickly at or near Earth's surface. |
rock | mixture of one or more minerals, rock fragments, volcanic glass, organic matter, or other natural minerals. |
foliated | describes metamorphic rock, such as slate and gneiss, whose mineral grains line up in parallel layers. |
rock cycle | model that describes how rocks slowly change form one form to another through time. |
granitic | escribes generally light-colored, silica rich, igneous rock that is less dense than basalitc rock. |
sediments | loose materials, such as rock-fragments, mineral grains, and dead organisms, that have been moved by wind, water, ice, or gravity. |
igneous rock | rock formed when magma cools or hardens. |
sedimentary rock | froms whenn sediments are comacted and cemented together or when minerals form from solutions. |
intrusive | describes a type of igneous rock that generally contains large crystals and forms when it cools below Earth's surface. |