lecture9 rockcycle
TRANSCRIPT
TheRockCycle
Quiz 3!
Rock cycle
metamorphic rocksigneous
rocks
sedimentary rocks
important to note rock types, processes, intermediary states, and shortcuts
IGNEOUS ROCK
Magma cools & solidifies IgneousRock
The Rock Cycle
Weathering-Surface processes that physically disrupt and chemically change rocks
Transport of Weathered Materials
Sediment Deposition
Magma cools & solidifies IgneousRock
WeatheringTransport &Deposition
Sediment
The Rock Cycle
SEDIMENTARY ROCK
Lithification
1 mm
cools & solidifies IgneousRock
WeatheringTransport &Deposition
Sedimentary Rock
Lithification
The Rock Cycle
Magma
Sediment
Sedimentary rocks exposed in the Canadian Rockies
cools & solidifies IgneousRock
WeatheringTransport &Deposition
Sedimentary Rock
LithificationWeatheringTransport &Deposition
The Rock Cycle
Magma
Sediment
METAMORPHIC ROCKS
cools & solidifies IgneousRock
WeatheringTransport &Deposition
Sedimentary Rock
LithificationWeatheringTransport &Deposition
Metamorphic Rock Heat &Pressure
The Rock Cycle
Heat &Pressure
Magma
Sediment
Limestone- sedimentary rock
Marble- metamorphic rock
How is Turkey Like a Metamorphic Rock?
Transformed in the Solid State
If there is melting, then it’s not metamorphism
The Rock Cycle
cools & solidifies IgneousRock
WeatheringTransport &Deposition
Sedimentary Rock
LithificationWeatheringTransport &Deposition
Metamorphic Rock Heat &Pressure
melting
melting
Heat &Pressure
melting
Magma
Sediment
The Rock Cycle
cools & solidifies IgneousRock
WeatheringTransport &Deposition
Sedimentary Rock
LithificationWeatheringTransport &Deposition
Metamorphic Rock Heat &Pressure
melting
melting
Heat &Pressure
melting
WeatheringTransport &Deposition
Magma
Sediment
The Rock Cycle
cools & solidifies IgneousRock
WeatheringTransport &Deposition
Sedimentary Rock
LithificationWeatheringTransport &Deposition
Metamorphic Rock Heat &Pressure
melting
melting
Heat &Pressure
melting
WeatheringTransport &Deposition
Magma
Sediment
The Rock Cycle
cools & solidifies IgneousRock
WeatheringTransport &Deposition
Sedimentary Rock
LithificationWeatheringTransport &Deposition
Metamorphic Rock Heat &Pressure
melting
melting
Heat &Pressure
melting
WeatheringTransport &Deposition
Magma
Sediment
Heat &Pressure
Heat &Pressure
The Rock Cycle
cools & solidifies IgneousRock
WeatheringTransport &Deposition
Sedimentary Rock
LithificationWeatheringTransport &Deposition
Metamorphic Rock
melting
melting
melting
WeatheringTransport &Deposition
Magma
Sediment
Earth’s
Internal structure
1. Core (2200 mi)
2. Mantle (1800 mi)
3. Crust (5-25 mi)
Inner CoreMantle
Crust
Outercore
- solid (due to very high pressure)
- composed of Fe & Ni
- 7000-9000°F
Outer Core
- molten
- composed of Fe & Ni
- 5400-7000°F
- generates magnetic field due to convective flow
Innercore
Mantle
Crust
Mantle
Innercore
Crust
Outercore
- majority of Earth’s volume
- composed of oxides of Fe, Si, and Mg
- data from volcanic material & experimental work
- 3300- 5100°F
- divided into 3 zones
3 mantle zones1. Uppermost mantle
- rigid
2. Asthenosphere- plastic
- moves indpt of lithosphere
3. Mesosphere- rigid
Mesosphere
Asthenosphere
Uppermost mantle
lithosphere
mantle
Crust- thin, brittle layer
- contains continents & ocean basins
- abundant elements: O, Si, Al, and Fe
Moho = discontinuity between crust & mantle
Lithosphere = crust +
uppermost mantle
Mantle
Outercore
Innercore
Continental vs. oceanic
crust
Continental OceanicThickness thick thin
Composition granite basalt
Elements Si & Al Fe & Mg
Density low high
Age old young
Isostasy• maintenance of
hydrostatic equilibrium of crust
-AKA buoyancy
• adding weight to crust = sink
• removing weight = rise
Excel Demo