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Geology Final
Concepts of geology
103
Geology
Undergraduate 3
12/10/2015

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Cards

Term
Evidence of plate tectonics
Definition
-continental fit
-similar rock sequences
-mountain ranges
-glacial
-fossils
-Magnetic field
-paleomagnitism
-sea floor spreading
Term
Divergent boundaries
Definition
-spreading centers
-volcanoes
-faults, dikes, lava, rift valleys
Term
Convergent
Definition
Mountain building metamorphism
Term
ocean ocean convergence
Definition
volcanic island arc, ocean trench
Term
ocean continent convergence
Definition
ocean trench, volcanic mountain range, andes
Term
continent continent convergence
Definition
interior mountain belt, alps
Term
igneous rock
Definition
andesitic magma
Term
transform boundaries
Definition
transform faults, connected to ridges
Term
hotspots
Definition
mantle plum, asesmic ridges, hawaii
Term
definition of a mineral
Definition
natural, inorganic, crystalline structure
Term
luster
Definition
quality and intensity of light from surface
Term
color
Definition
quartz- light; galena dark
Term
quartz
Definition
light
Term
galena
Definition
dark
Term
cleavage
Definition
breakage in smooth parallel plains
Term
fracture
Definition
breakage irregular
Term
Hardness
Definition
measured on the Mohr Scale
Term
common minerals (9)
Definition
-silicate
-oxide
-carbonate
-native elements
-phosphate
-halide
-sulfide
-sulfate
-hydroxide
Term
feldspars
Definition
most common mineral (light)
Term
Rock definition
Definition
solid aggregate of one or minerals
Term
Ferromagnitism
Definition
contain Fe and Mg, dark
Term
nonferromagnitism
Definition
doesnt have Fe or Mg, light
Term
Magma
Definition
-mass of molten rock under the surface
-exposed after uplift an erosion
-Granite is most common in plutons
-cools under surface
Term
lava
Definition
magma that reaches the surface
Term
more silicate
Definition
more viscous
Term
felsic
Definition
silicate rich
Term
mafic
Definition
less silicate
Term
ultramafic
Definition
least amount of silicate
Term
2 branches of origin of magma
Definition
discontinuous and continuous
Term
discontinuous branch
Definition
non complete reactions
Term
spreading centers
Definition
mafic rock formed
the richest in silica melt first
Term
subduction zones
Definition
intermediate and felsic magma
magma rises through crust and gains silica
Term
hotspots
Definition
mantle plume
flood basalts
Term
rapid cooling causes
Definition
fine grained, extrusive
Term
aphantic definition
Definition
fine grained
Term
slow cooling causes
Definition
course grained, intrusive
Term
phaneritic definition
Definition
course grained
Term
glassy look
Definition
lava cools so fast no crystals form
Term
Vesicular look
Definition
gas trapped in the lava
Term
pyroclastic
Definition
explosive volcanic activity
Term
Basalt
Definition
upper mantle oceanic crust, volcanoes
Term
Gabbro
Definition
less common ocean lower crust
Term
rhyolite
Definition
felsic, light in color
Term
granit
Definition
most common intrusive, continental
Term
pegmatites
Definition
minerals 1 cm or larger
Term
ash
Definition
really small particles
Term
tuff
Definition
clump of ash
Term
obsidian
Definition
black, red, grey, high in silica
Term
pumice
Definition
volcano glass, holes, white
Term
scoria
Definition
holes, more crystialline than pumice
Term
plutons
Definition
intrusive igneous bodies
Term
three things volcanoes can be
Definition
active dormant or extinct
Term
lava flows
Definition
form lava tubes by margins cooling
Term
pahoehoe
Definition
ropy surface, less viscous
Term
aa
Definition
rough and jagged, more viscous
Term
pressure ridge
Definition
pressure on crust from flowing lava
Term
columnal joints
Definition
columns held by fractures
Term
spatter cone
Definition
gasses in globs escaping
Term
pillow lava
Definition
cools underwater rapidly so no crystallization
Term
pyroclastic material
Definition
volcanic ash
lapilli
block/bomb
Term
lapilli
Definition
2 to 64 mm
Term
block/bomb
Definition
greater then 64 mm
Term
sheild
Definition
low rounded, like a hill, like a sheild
Term
cindercones
Definition
small steep bowl like a crater
Term
composite
Definition
most common. looks like it is supposed to look
Term
lavadome
Definition
bulbous mountains like a blob
Term
location of volcanoes
Definition
ring of fire, plate boudaries
Term
divergent volcanoes
Definition
mafic magma, no explotions
Term
convergent volcanoes
Definition
felsic magma, composite volcanoes
Term
interplate volcanoes
Definition
hotspots, mafic magma
Term
detecting a volcanic eruption (7)
Definition
physical and chemical changes, tiltmeter, geodimeter, gas emmmisions, ground water levels, volcanic tremor
Term
definition of weathering
Definition
physical breakdown and chemical alteration of earth materials near or at the surface
Term
components of erosion (4)
Definition
running water, wind, glaciers, marine currents
Term
differential weathering
Definition
uneven weathering
Term
structures made by differential weathering (3)
Definition
hoodoos, fins, arches
Term
Mechanical weathering components (5)
Definition
frost action, pressure release, thermal expansion and contraction, salt crystal growth, biotic
Term
chemical weathering components (4)
Definition
O2, H2O, acids, organisms
Term
Detrital sediment
Definition
derived from parent rock
Term
Chemical sediment
Definition
derived from solutions (shells)
Term
compation sediment
Definition
cumulative weight of sediment reduces pores space and volume deposit
Term
cementation sediment
Definition
precipitaion of minerals within pore spaces
Term
crossbedding
Definition
layers at an angle from where deposited
Term
graded bedding
Definition
formed by turbitity current
Term
ripple
Definition
caused by current
Term
mud cracks
Definition
dried mud
Term
metamorphic rock changes by (3)
Definition
heat, pressure, fluid activity,
Term
contact
Definition
magnetic heat and fluid to change
Term
dynamic
Definition
differential pressure associated with deformation
Term
regional
Definition
major mountain building episodes
Term
foliated rock
Definition
differential pressure, one mineral
Term
non foliated rock
Definition
mosaic equidistant minerals, buncha minerals
Term
focus of an earthquake
Definition
location where fracturing begins
Term
epicenter
Definition
where the focus meets the crust of the earth
Term
where is focal point deeper
Definition
subduction zones
Term
p waves
Definition
compressional waves
Term
s waves
Definition
shear waves move material
Term
intensity
Definition
damage caused
Term
magnitude
Definition
energy released
Term
earthquake predictions
Definition
timeframe, location, strength, seismic risk maps.
Term
folds
Definition
planar rock features are crumbled and bent
Term
examples of folds
Definition
monoclines, synclines, anticlines
Term
joints
Definition
no movement
Term
faults
Definition
parallel movement
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