Question | Answer |
basaltic | describes dense, dark-colored igneous rock formed from magma rich in magnesium and iron and poor in silica |
lava | molten rock that flows from volcanoes onto Earth's surface |
cementation | sedimentary rock-forming process in which sediment grains are held together by natural cements that are produced when water moves through rock and soil |
metamorphic rock | forms when heat, pressure, or fluids act on igneous, sedimentary, or other metamorphic rock to change its form or composition, or both |
compaction | pricess that forms sedimentary rocks when layers of sediments are compressed by the weight of the layers above them |
nonfolliated | describes metamorphic rock, such as quartzite or marble, whose mineral grains grow and rearrange but generally do not form layers |
extrusive | describes fine-grained igneous rock that forms when magma cools quickly or near Earth's surface |
foliated | describes metamorphic rock, such as slate and gneiss, whose mineral grains line up in parallel layers |
rock cycle | model that describeshow rocks slowly change from one form to another through time |
grantic | describes generally light-colored, silica-rich igeous rock that is less dense than basaltic rock |
sediment | loose materials, such as rock fragments, mineral grains, and the remains of once-living plants and animals, that have been moved by wind, water, ice, or gravity |
igneous rock | rock formed when magma or lava cools and hardens |
sedimentary rock | forms when sediments are compacted and cemented together or when minerals form from solutions |
intrusive | describes type of igneous rock taht generally contains large crystals and forms when magma cools slowly beneath Earth's surface |