#21-mafic
DESCRIPTION
#21-Mafic. Definition: Igneous rocks that contain dark colored minerals. #22-Magnitude. Definition: A measure of the size of an earthquake based on the amount of ground motion experienced: specified on the Richter scale . #23-Mantle. - PowerPoint PPT PresentationTRANSCRIPT
#21-MAFICDefinition: Igneous rocks that contain dark colored minerals.
#22-MAGNITUDE Definition: A measure of the size of an
earthquake based on the amount of ground motion experienced: specified on the Richter scale
#23-MANTLE
Definition: the portion of the earth, about 1800 miles thick, between the crust and the core.
#24-METAMORPHISM Definition: The alteration of the texture, composition and minerals of a rock by exposure to heat, pressure or chemical actions.
#25-MINERAL
Definition: A naturally occurring, inorganic solid with a definite composition and ordered internal structure.
#26-MOH’S HARDNESS SCALEDefinition: A comparison scale used during mineral identification.
#27-NORMAL FAULT LINEDefinition: A break in rock caused by tension forces, where rock above the fault surface moves down.
#28-OBLIQUE SLIP FAULT LINEDefinition: A fault that breaks
along a vertical and horizontal angle.
#29-PANGEA Definition: The large, ancient landmass that was composed of all the continents joined together.
#30-PRIMARY SEISMIC WAVEDefinition: Seismic waves that
move rock particles back and forth in the same direction the wave travels.
#31-REVERSE FAULTDefinition: A break in rock caused by compressive forces, where rock above the fault surface moves upward.
#32-ROCK CYCLE Definition: The model that
describes how rocks slowly change from one form to another through time.
#33-Sea Floor SpreadingDefinition: Hess’s theory that new seafloor is formed when magma is forced upward toward the surface at a mid-ocean ridge.
#34-Sedimentary RockDefinition: Rock that forms from
sediments that are compacted and cemented together.
#35-Surface WaveDefinition: A seismic wave that moves rock particles up and down in a backward rolling motion and side to side in a swaying motion.
#36-S-WaveDefinition: A type of seismic wave
in which rock particles vibrate at right angles to the direction of wave travel. Secondary waves cause the rocks they pass through to change in shape.
#37-Transform Fault Definition: A type of strike-slip fault that
accommodates the relative horizontal slip between tectonic plates, and is common along the edges of plates in mid-ocean ridge regions
#38-TsunamiDefinition: A seismic sea wave that begins over an earthquake focus and can be highly destructive when it crashes on shore.
#39-TrenchDefinition: A long, narrow, steep-sided depression in the seafloor formed where one crustal plate sinks beneath another.
#40-VolcanoDefinition: An opening in the
Earth’s surface that erupts sulfurous gases, ash, and lava.