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;
33 Cards in this Set
- Front
- Back
|
Convergent zones are an example of what type of tectonic force? a) Compressive b) Tensional c) Shear |
compressive |
|
|
Transform zones are an example of what type of tectonic force? a) Compressive b) Tensional c) shear |
shear |
|
|
Divergent zones are an example of what type of tectonic force? a) compressive b) tensional c) transform |
tensional |
|
|
Ductile (plastic) response of rock layers results in ___________ |
Folds - permanent wavelike deformations in layered rocks |
|
|
Brittle response to stress in rocks results in ________ |
Faults |
|
|
Folds form at relatively ____________ temperatures and __________ pressures |
1. high 2. high |
|
|
A fold with the convex side upward and the oldest layers in the middle is called |
Anticline |
|
|
A fold with concave side upwards and youngest layer in middle is called |
Syncline |
|
|
A fold has a _________ on both sides. An _________ that cuts the field in half with a plan. And a __________ which is a line that cuts through centre |
1. Limb 2. Axial plane 3. fold axis |
|
|
A fold in which is pushed over with limbs dipping in opposite directions but at different angles (axial plane is tilted) is called a a) symmetrical fold b) asymmetrical fold c) overturned fold |
Assymetrical fold - limbs= opposite directions - different angles |
|
|
A fold in which both limbs dip symmetrically away or towards axial plane? a) symmetrical fold b) asymmetrical fold c) overturned fold |
symmetrical fold |
|
|
A fold that is pushed over with limbs dipping in the same direction but at different angles is called a a) symmetrical fold b) asymmetrical fold c) overturned fold |
Overturned fold - limbs dip in same direction - different angles axial plane approaches horizontal |
|
|
A structural dome is a ______________ circular structure |
anticlinal |
|
|
A structural basin is a _________________ circular structure |
synclinal |
|
|
Is there a structural dome or structural basin in wyoming? |
structural dome |
|
|
Faults occur at _________________ pressures and ___________ temperatures |
1. lower 2. lower |
|
|
Which fault is a result from extension ? |
Normal fault |
|
|
Which fault is a result of compression? |
Reverse fault |
|
|
What is the common fault type in the Foothills and Rockies? |
Thrust fault |
|
|
What type of fault forms long linear valleys usually indicated by streams or long lakes? |
Strike- Slip faults |
|
|
_________ occurs when the opposite side moves to the left |
left lateral |
|
|
____________ occurs when the opposite side moves to the right |
right lateral |
|
|
What type of faults occur at mid ocean ridges |
normal faults - extensional tectonic setting (divergent plate boundary) |
|
|
What type of faults are responsible for rifts in the crust |
Normal faults - extension in the crust |
|
|
Decollement or Detachment (thrust faults) define the boundary between the _______ and __________ |
- Thrust wedge - Basement |
|
|
What type of faults occur in regions subject to compressive stress? (convergent plate boundaries) |
Thrust faults |
|
|
The Canadian Rocky Mountains are an example of ___________ faults |
Thrust |
|
|
Thrust faults generally occur along a weak ___________ |
horizon |
|
|
In general terms Thrust faults are low angle __________ |
reverse faults |
|
|
What are the 2 component parts of a thrust fault |
- Ramps - flats |
|
|
The rocks underlying the praires are |
horizontal/ flatline |
|
|
True or False: The Mountain Topography we see today is a product of orogeny (the process of mountain building |
False - TOPOGRAPHY DUE TO EROSION |
|
|
True or False: Thrust belts accomodate a lot of horizontal shortening |
True |
