This site is 100% ad supported. Please add an exception to adblock for this site.

Chapter 6 Deformation

Terms

undefined, object
copy deck
A large upfold or arch of layered rocks.
Anticline
An imaginary surface that divides a fold as symmetrically as possible, with one limb on either side of the plane
Axial plane
A bowl-shaped depression of rock layers in which the beds dip radially toward a central point
Basin
A material that undergoes little deformation under increasing force, until it breaks suddenly
Brittle material
A force that squeezes together or shortens a body
Compressive force
The amount of tilting of a rock layer; the angle at which the bed inclines from the horizontal
Dip
A fault on which there has been relative movement of the blocks up or down the dip of the fault plane
Dip-slip fault
A broad circular or oval upward bulge of rock layers
Dome
A material that undergoes smooth and continuous plastic deformation under increasing force and does not spring back to its original shape when the deforming force is released.
Ductile material
The processes by which tectonic forces cause the lithosphere to break and slip along a fault
Faulting
the processes by which crustal forces deform an area of crust so that layers of rock are pushed into folds
Folding
A map representing the rock formations exposed at Earth's surface
Geologic map
A diagram showing the geologic features that would be visible if vertical slices were made through part of the crust
Geologic cross-section
A crack in a rock along which there has been no appreciable movement
Joint
A dip-slip fault in which the rocks above the fault plane move down relative to the rocks below the fault plane, extending the structure horizontally
Normal fault
A force that pushes two sides of a body in opposite directions
Shearing force
The compass direction of a rock layer, fault, or other planar structure where it intersects with a horizontal surface
Strike
A fault on which the movement has been horizontal, parallel to the strike of the fault plane
Strike-slip
A large downfold whose limbs are higher than its center
Syncline
A force that stretches a body and tends to pull it apart
Tensional force
A low-angle reverse fault- one with a dip of less than 45 degrees- so that the overlying block moves mainly horizontally
Thrust Fault

Deck Info

21

megankj

permalink