Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
10 Cards in this Set
- Front
- Back
|
Fold mountains Length Height Rock type Earthquakes |
1000s km long 8.8km high Metamorphic rocks Shallow-intermediate earthquakes |
|
|
Continental rifts |
A Rift Valley or graben is a liner strip of crust that has slipped down along two inward dipping normal faults |
|
|
Cratons Origin Rock type Age Earthquakes Flat? |
Cores of ancient continents Metamorphic rock Very old >3 Ga Aseismic Flat due to long periods of erosion |
|
|
Continental shelf Depth Formation |
Formed of continental crust Covered with clastic sediments Depth ranges 200 m |
|
|
Continental slope Gradient Depth Sediment |
4 degrees steep Depth ranges from 200m to 1500-3500m deep Sediment transported down by turbidity currents |
|
|
Abyssal plain Depth Flat? Sediment Seismic activity |
3-5 km deep Flat Covered with OOZE (microscopic planktonic organisms) Aseismic as it is distant from plate boundaries |
|
|
Deep sea trenches |
Submarine valleys 11 km deep 150km wide 1000's km long |
|
|
Seamount |
Submarine basalt volcano without reaching sea level |
|
|
Guyot |
A seamount with a flat, eroded top |
|
|
MOR's |
Rises 2-3km above abyssal plain Centre is a Rift Valley Submarine eruptions of basalt occur Divergent plate boundaries Shallow focus earthquakes |
