Reading...
Play button
Play button
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;
57 Cards in this Set
- Front
- Back
|
sea floor continental dirft lithospheric plates move approximately...
|
2 cm per year
|
|
|
deep sea drilling project discovered the ocean floor is youngest adjcadent to...
|
oceanic ridges
|
|
|
oldest oceanic curst in ATL ocean basin is...
|
much younger than the oldest continental crust on the N. Am continent
|
|
|
new oceanis crust material is created by upwelling/crust at where?
|
divergent plate boundary
|
|
|
anticlines...
|
all of the above
|
|
|
synclines are usually produced by what stress?
|
compression
|
|
|
if hanging wall down relative to footwall fault = ?
|
normal fault
|
|
|
what was protocontinents name?
|
pangaea
|
|
|
N/S regions of pangaea?
|
Gondwana, Laurasia
|
|
|
How many million years?
|
150-200 million years ago
|
|
|
mantle material moves up ...
|
ocean basin
|
|
|
ocean progress older ...
|
away from surface
|
|
|
drifting occurs...
|
divergent plate boundary
|
|
|
what increases forces?
|
tension forces
|
|
|
compression means?
|
bring together
|
|
|
Compression K2...
|
anticlines, syncline
|
|
|
Father?
|
A. Wegener
|
|
|
General direct N. Am/S. Am are moving...
|
western/northwest
|
|
|
Eroded domes, basin, how does formation fit in each case/center?
|
anticline, syncline, dome
|
|
|
max angle of dip fault?
|
90 degrees
|
|
|
Is there a hanging wall/football assoc with 90 degree dip?
|
No
|
|
|
Another name of a special kind of reverse fault less than 90 degrees?
|
Thrust
|
|
|
National monument that is an example of columnar jointing?
|
Devil's Tower, WYO
|
|
|
Top, bottom configuration of...
|
Unconformities
|
|
|
Why is a reverse fault a dip slip fault?
|
Because of the movement of blocks along the dip
|
|
|
Another name for a horizontal dlip flip fault?
|
Transform fault
|
|
|
Vertical/horizontal =
|
Oblique fault
|
|
|
Famous Graben/horst =
|
Rhine
|
|
|
Type of vertical fault any horst/graben combination =
|
Normal fault
|
|
|
Divergent plate exist back of Af?
|
African Rift valley
|
|
|
Do the age of the rocks in the ocean basin become progressively older or younger away from the ocean ridge?
|
older
|
|
|
According to the classification of plate boundaries, which type of plate boundary is defined by a pair of convection cells working together to form a compressional force?
|
convergent
|
|
|
A divergent plate boundary between 2 continental plates
|
African rift valley
|
|
|
A convergent plate boundary between an ocean basin plate and a continental plate
|
Cascades
|
|
|
A convergent plate boundary between 2 continental plates
|
India and Asia
|
|
|
A convergent plate boundary between 2 ocean basin plates
|
Aleutian Islands and Japan
|
|
|
Do the rocks of the Hawaiian Island chain become older or younger westward
|
older
|
|
|
Name the type of plate boundary in which lithospheric plates move laterally along the plate boundary
|
transform or lateral
|
|
|
State the specific name given to the plane which bisects anticlines and synclines shown in the plan (map) view
|
fold axis
|
|
|
Which geologic structure does the following explain?: a downarched structure with limbs dipping towards the center of the structure through 360 degrees
|
basin
|
|
|
A fold opened at 2 ends and the eroded surface displays a progressive older age in the direction away from the center of the structure
|
syncline
|
|
|
A fold with strata having only one direction of dip
|
monocline
|
|
|
The sides of the fold show a mirror image of each other
|
symmetrical
|
|
|
That which is represented by a compass direction perpendicular to the direction of dip
|
strike
|
|
|
A geologic structure with no open ends and displays a progressivly younger age of the rocks in a direction away from its center on an eroded surface
|
dome
|
|
|
A geologic structure with limbs dipping outward from the center of the structure through 360 degrees
|
dome
|
|
|
State one type of force which causes folds
|
compression
|
|
|
What is the plunge direction of an anticline if the curved contacts of the formations seen from the plan are closed on the south end of the fold?
|
south
|
|
|
Name the wedge of land upthrown between 2 normal faults
|
horst
|
|
|
What lies directly under the massive erosional surface in a disconformity?
|
non folded sedimentary beds
|
|
|
Is the relative movement of the hanging wall up or down in respect to the footwall in a reverse fault?
|
up
|
|
|
What is the name given to all vertical faults?
|
dip slip
|
|
|
Other than a series of sedimentary formations what is another feature common in all types of unconformities
|
massive erosion surfaces
|
|
|
On what geologic structure does the Rhine River in Germany lie?
|
graben
|
|
|
State the type of fault which is represented by the San Andreas Fault in California
|
strike slip or horizontal (transverse) fault
|
|
|
imaginary line with compass direction equal elevation
|
strike
|
|
|
imaginary line down slope
|
dip
|
