GE 2000 Exam 2 MTU Questions and
Answers
brittle, ductile, and elastic strain - CORRECT ANSWER-faulting - broken block
flow - stretched back
elastic - reversible, not permeant effect on material
elastic limit - max stress before permanent effect
ductile - irreversi...
GE 2000 Exam 2 MTU Questions and
Answers
brittle, ductile, and elastic strain - CORRECT ANSWER-faulting - broken block
flow - stretched back
elastic - reversible, not permeant effect on material
elastic limit - max stress before permanent effect
ductile - irreversible permanent change in shape or volume
rupture/fracture - material breaks
the factors that affect the strain a rock experiences - CORRECT ANSWER-rock
composition
confining stress (depth) = high stress makes it harder to deform rock
temperature high temp = more ductile
strain rate - high strain = more brittle
know what structures result from brittle deformation - CORRECT ANSWER-joints -
fractures in rock where no movement has occurred. Results from tensional stress
faults - brittle fracture in rock upon which movement slip has occurred.
+ normal
+ reverse
+ thrust
+ strike slip
know what structures result from ductile deformation - CORRECT ANSWER-folds -
bend or warp in layered rocks results from compressional or shear stress
+ anticline - concave downward
+ syncline - concave upward
+ monocline
know what isostasy means - CORRECT ANSWER-idea that the lighter crust must be
floating on the denser underlying mantle
, what is meant by mountains having a "crustal root" - CORRECT ANSWER-uplift of the
Earth's surface is accompanied by thickening of the crust,
the different tectonic settings that cause orogenies - CORRECT ANSWER-continental
subduction
collision
rifting
difference between catastrophism and uniformitarianism - CORRECT ANSWER-
catastrophism assumes that these were violent, short-lived, large-scale events,
uniformitarianism supports the idea of gradual, long-lived, small-scale events.
difference between relative and absolute time - CORRECT ANSWER-Relative age is
the age of a rock layer (or the fossils it contains) compared to other layers. Absolute age
is the numeric age of a layer of rocks or fossils. Absolute age can be determined by
using radiometric dating.
major principles used for determining relative age - CORRECT ANSWER-+ principle of
superposition - rock layers are younger from bottom to top
+ principle of original horizontally - sediments were originally deposited horizontally
+ principle of original lateral continuity - layers extend until they thin to nothing at the
edge of the depositional basin
+ principle of cross cutting relationship - younger rocks intrude over older rocks
+ principle of baked contacts - igneous rocks metamorphose the surrounding rocks
+ principle of inclusions - any rock included in another rock must be older than the host
rock.
+ principle of faunal succession
recognize the different types of unconformities - CORRECT ANSWER-disconformities -
occurs between layers of sedimentary rocks
angular unconformities - obvious time break
nonconformities - boundary between sedimentary rocks and crystalline rocks
instability in large nuclei - CORRECT ANSWER-The stability of a nucleus is determined
by its binding energy, higher binding energy conferring greater stability. ... In heavier
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