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;
23 Cards in this Set
- Front
- Back
Brittle Deformation |
most common - rocks break or fracture under stress - faults- when pieces break relative to eachother - abrupt |
|
Elastic Deformation |
- Rocks can stress of compress - Where energy is store - reversable (not permanent) |
|
Plastic deformation |
permanent - no energy would be released |
|
Ductile Deformation |
permanent change - under stress rocks can fold, stretch, or shear - slow moving |
|
Compressional stress |
plates push together and squeeze rock |
|
what type of plate boundary does compression usually happen at? |
Convergent and subduction |
|
Tensional stress |
plates pull apart- stretches rock |
|
what type of plate boundary does tensional happen at? |
divergent |
|
Shear stress |
plates slip past each other- distorts rock |
|
what plate boundary does shear happen at? |
transform |
|
What is stress? |
force that acts on a rock |
|
what is strain? |
the deformation- or the response of stress on rock |
|
Side view |
Dip slip vertical motion (normal or reverse) |
|
map view |
strike slip (right lateral or left lateral) |
|
Normal caused by |
tension |
|
Reverse caused by |
compression |
|
left and right lateral caused by |
shear |
|
In a normal fault the hanging wall should always be going |
down |
|
What type of motion can be determined? |
relative motion |
|
Earthquakes along divergent boundaries are usually |
shallow and weak |
|
the deepest quakes with tsunamis usually occur on |
subduction zones |
|
marine transform boundaries usually have what type of quake |
weaker quakes than continental sediment |
|
Intraplate quakes affect |
large areas because the crystalline rocks can easily transmit seismic activity |