Geology and Earth Resources (10/22)
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Geology
study of dynamic processes taking place on the earth’s surface and in its interior
Concentric zones of the earth
Core, mantle, crust
Crust sections
Continental (thick, less dense, old), and oceanic crust (thin, dense, young, most of crust)
Layers of the Core
inner core (solid) and outer core (liquid). mostly made of nickel and iron, and is the innermost section of the earth
Mantle
most of earth’s mass and volume, second innermost section of the earth
Mineral
naturally occurring chemical element or inorganic compound that exists as a crystalline solid
Rock
a compound of one or more minerals
Sedimentary
type of rock that’s formed when sediments are compacted
Metamorphic
type of rock that’s formed when other rocks are transformed
Igneous
type of rock that’s formed when lava or magma solidifies
Rock cycle
surface breaks down into sediments under water, goes through compaction and cementation, gets buried deep underground in heat and pressure, melts, crystalizes, and slowly forced to the surface
Alfred Wegner
proposed the idea of continental drift in his book in 1912
Divergent Boundary
tectonic plate boundary where two plates are moving away from each other, causing volcanic activity and creating new crust
Convergent Boundary
where two tectonic plates move toward each other, causing a collision that can result in mountains, volcanic activity, and earthquakes
Transform Boundary
type of tectonic plate boundary where two plates slide horizontally past each other, causing earthquakes but not the creation/destruction of lithosphere
Volcanoes
may be active, dormant, or extinct. have different shapes depending on how fast the lave flows and how violent the eruption is
Earthquakes
breakage and shifting of rocks occurs at a fault. seismic waves are vibrations in the crust
Richter Scale
logarithmic scale for earthquakes.
Order of Richter Scale Classifications
(smallest to biggest, starts at 4) minor, damaging, destructive, major, great, extreme
Moraines
ridges or mounds of rock debris deposited directly by a glacier
Drumlins
streamlined, elongated hills formed by glacial ice flowing over and depositing sediment, typically glacial till
Ores
mineral resource containing profitable concentration of a mineral (can be high or low grade)
Rare Earth metals
Lanthanides, not particularly rare, but difficult to seperate
Fossil Fuels
oil, coal, and natural gas. exist in finite amounts