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Geology

561 result(s) found.

  This discipline defines terms pertaining to Earth—its history, structure, composition, life forms and processes that continue to shape and change it. This broad field of science covers many subspecialties. Definitions within range from absolute pressure to lithification to Wentworth scale. All definitions have been reviewed by geologists, and many are augmented by high-quality photographs or illustrations.

A

abnormal pressure aggradation anisotropy argillaceous
absolute age aggradational anomalous asphalt
absolute permeability alidade anomaly asthenosphere
absolute pressure allochthon anoxic attitude
abyss allochthonous anticlinal aulacogen
abyssal allogenic anticlinal trap authigenic
accommodation alluvial anticline autochthon
accumulation alluvium antithetic fault autochthonous
active margin anaerobic apparent dip axial surface
aeolian angular unconformity appraisal azimuth
aeolotropy anhydrite aquifer azimuthal
aerated layer anisotropic arenaceous

B

barite bed benthic biostratigraphy
base map bed thickness benthos bitumen
basement bedrock bentonite Bouma sequence
basin Benioff zone biostratigraphic brine
bathyal

C

calcite chronostratigraphy compaction conventional reservoir
caliche CI competent convergence
cap rock clastic intrusion concentric fold convergent
caprock clastic sediment condensate core
carbonate clathrate condensed section correlate
cataclasite clay conformable correlation
cataclastic clean conformity craton
catagenesis clear brine connate water crest
CBM closure consolidated critical moment
cement coal consolidation crop out
cementation coal bed methane contact cross section
chalk coal seam gas continental shelf cross-sectional
channel coalbed methane contour crude oil
chert coal-bed methane contour interval crust
cherty coal-seam gas contour map CSG
chlorite collision convection cubic packing
chronostratigraphic chart

D

dead oil depositional system diatomite dolostone
decollement detrital differential compaction dome
deepwater play detritus dike down dip
deep-water play development dip down lap
delta dextral dipping bed downdip
deltaic diagenesis dirty downlap
density diagenetic disconformity drained test
density current diagenetic porosity disharmonic drape
depocenter diapir displacement dry gas
deposit diatom dolomite dry rock
depositional energy diatomaceous dolomitization dyke
depositional environment

E

earthquake elastic limit erosion evaporite
effective permeability elasticity estuarine evaporitic
effective porosity en echelon estuary exploration
elastic eolian eustasy exploration play
elastic deformation erode eustatic exploratory

F

fabric felsic fold fracture gradient
facies fence diagram formation fracture permeability
fairway field formation pressure fracture porosity
fault flower structure formation water free gas
fault trap fluid contact fossil free water
feldspar fluvial fracture fresh water

G

gas hydrate geochemistry geopressure GPS
gas in solution geochronology geopressure gradient GPTS
gas oil contact geologic geopressured graben
gas prone geologic map geostatic pressure grain density
gas sand geologic time scale geothermal gradient granite
gas water contact geological glacial groundwater
gas-oil contact geologist glauconite growth fault
gas-prone geology Global Positioning System GWC
gas-water contact geomagnetic polarity reversal GOC gypsum
generation geomagnetic polarity time scale

H

hade heterogeneous horst hydrocarbon kitchen
halite hiatal hydrate hydrostatic head
hard rock hiatus hydration hydrostatic pressure
hardground homogeneity hydraulic head hydrothermal
harmonic homogeneous hydrocarbon hydrothermal alteration
heterogeneity horizon

I

igneous in situ interstitial water isostasy
illite incompetent inversion isostatic
immature injectite isochore isotropic
immiscible in-situ isopach isotropy
impermeable

J

joint

K

kaolinite karst kerogen

L

lacustrine listric fault lithology lithostratigraphy
lamination lithification lithosphere littoral
lease lithofacies lithostatic pressure low velocity layer
limestone lithologic lithostratigraphic low-velocity layer
lineament lithologic contact

M

Ma massif micrite miscible
mafic matrix micropaleontology Moho
magma maturity midoceanic ridge Mohorovicic discontinuity
magnetic reversal sequence metamorphic migrate moldic porosity
mantle metamorphism migration montmorillonite
marine methane Milankovitch cycles MRS
marl methane hydrate mineral My
marsh mica mineralogy MYBP

N

natural fracture neritic normal fault normal pressure
natural gas nonconformity

O

offset oil sand onlap overmature
oil field oil water contact orogenic overpressure
oil kitchen oilfield orogeny overthrust
oil pool oil-prone outcrop OWC
oil prone oil-water contact overburden

P

paleontology petrography plate tectonics porous
paludal petroleum plateau post mature
palustrine petroleum system platform post-mature
palynology petrologic play preservation
parallel fold petrology plunge pressure gradient
parasequence pinch out point bar primary migration
passive margin pinch-out pore primary porosity
pay plane table pore pressure production
permeability plankton pore pressure gradient progradation
permeable plastic pore-pressure gradient prospect
petrographic plastic deformation porosity pyrolysis

Q

quartz

R

radial faulting relative age retrogradation rheology
reef relative permeability reverse fault rhombohedral packing
reefal reservoir rheologic rift
regression reservoir pressure rheological rock
regressive

S

s.g. seep smectite strike-slip fault
sabkha seismite soft rock structural
salt sequence sorting structural trap
salt dome sequence boundary sour structure
sand sequence stratigraphy source rock structure map
sandstone shale specific gravity stylolite
saturation shale oil spill point subduction
scout shaly strain subsalt
scout ticket shear strain strata subsidence
seal shelf stratigraphic analysis superposition
secondary migration silica stratigraphic trap swamp
secondary porosity silicate mineral stratigraphy sweet
sediment siliciclastic sediment stratum syncline
sedimentary similar fold stress synthetic fault
sedimentary basin sinistral strike systems tract
sedimentation slip

T

tadpole thrust fault transform fault true dip
tectonic environment tight transgression true stratigraphic thickness
tectonics tight gas transgressive true vertical thickness
tectonism tight oil transpression tuff
temperature gradient TOC transtension tuffaceaous
terrestrial topographic map trap turbidite
thermal gradient tortuosity trend turbidity current

U

UCS unconformity trap underpressured uniformitarianism
Udden-Wentworth scale unconventional resource undrained test Universal Transverse Mercator grid (UTM)
unconfined compressive strength underpressure uniaxial compressive strength updip
unconformity

V

varve virgin pressure volcanic vuggy
vesicle vitrinite volcano vugular
vesicular vitrinite reflectance vug vugular porosity
vesicular porosity

W

Wadati-Benioff zone weathering wet gas wrench fault
weathered layer Wentworth scale

Y

yield point

Z

zonal zone