10 Flashcards
(SHAPE AND FORM OF A PARTICULAR STRUCTURE)
PLANAR, CURVIPLANAR, LINEAR SURFACE.
GEOMETRY-
CLASSIFIED BASED ON THE FFG:
GEOMETRY-
BASED ON GEOLOGIC SIGNIFICANCE
BASED ON TIMING OF FORMATION
BASED ON PROCESS OF FORMATION
BASED ON MESOSCOPIC COHESIVENESS DURING DEFORMATION
BASED ON STRAIN SIGNIFICANCE
BASED ON DISTRIBUTION IN A VOLUME OF ROCK
FORMED A CONSEQUENCE OF THE FORMATION PROCESS OF THE ROCK ITSELF.
PRIMARY-
FORMED BY INJECTION OF UNCONSOLIDATED MATERIAL DUE TO SUDDEN
RELEASE OF PRESSURE
FLUID-PRESSURE DRIVEN-
FORMED DUE TO LOCAL LATERAL VARIATIONS IN ROCK
DENSITY, CAUSING LOCAL BUOYANCY FORCE.
LOCAL DENSITY-INVERSION DRIVEN-
FORMED DUE TO SLIP DOWN AN INCLINED PLANE; SLUMPING AT ANY
SCALE DRIVEN BY LOCAL EXCESS OF GRAVITATIONAL POTENTIAL.
LOCAL GRAVITY-DRIVEN-
FORMED DUE TO LITHOSPHERIC PLATE INTERACTIONS, DUE TO REGIONAL INTERACTION
BETWEEN THE ASTHENOSPHERE AND THE LITHOSPHERE, DUE TO CRUSTAL-SCALE OR LITHOSPHERIC
SCALE GRAVITATIONAL POTENTIAL ENERGY AND THE TENDENCY OF CRUST TO ACHIEVE ISOSTATIC
COMPENSATION.
TECTONIC-
FORMED AT THE SAME TIME AS THE MATERIAL THAT WILL ULTIMATELY FORM THE
ROCK.
SYN-FORMATIONAL-
FORMED BEFORE THE FULL LITHIFICATION BUT AFTER INITIAL DEPOSITION
PENECONTEMPORANEOUS-
FORMED AFTER THE ROCK HAS FULLY FORMED, AS A CONSEQUENCE OF
PHENOMENA NOT RELATED TO THE IMMEDIATE ENVIRONMENT OF ROCK FORMATION.
POST-FORMATIONAL-
RELATED TO DEVELOPMENT OR COALESCENCE OF CRACKS IN ROCK.
FRACTURING-
RELATED TO THE SLIP OF ONE BODY OF ROCK PAST ANOTHER, OR OF
GRAINS PAST ONE ANOTHER, BOTH WHICH ARE RESISTED BY FRICTION.
FRICTIONAL SLIDING-
RESULTING FROM THE DEFORMATION BY INTERNAL FLOW OF CRYSTALS WITHOUT
LOSS OF COHESION, OR BY NON FRICTIONAL SLIDING OF CRYSTALS PAST ONE ANOTHER
PLASTICITY-
RESULTIING FROM MATERIAL TRANSPORT EITHER SOLID-STATE OR ASSISTED BY A
FLUID (DISSOLUTION)
DIFFUSION-
FORMED BY LOSS OF COHESSION ABROSS A MESOSCOPIC DISCRETE SURFACE.
BRITTLE-
FORMED WITHOUT THE LOSS OF COHESION ACROSS A MESOSCOPIC DISCRETE
SURFACE.
DUCTILE-
INVOLVING BOTH BRITTLE/DUCTILE ASPECTS.
BRITTLE/DUCTILE-
RESULTING IN SHORTENING OF A REGION
CONTRACTIONAL-
RESULTING IN EXTENSION OF A REGION
EXTENSIONAL-
RESULTING FROM MOVEMENT WITHOUT EITHER SHORTENING OR EXTENSION
STRIKE-SLIP-
OCCURS THROUGH THE ROCK BODY AT ALL SCALES.
CONTINUOUS-
OCCURS THROUGHOUT THE ROCK BODY AT THE SCALE OF OBSERVATION; UP
CLOSE, THERE MAY BE SPACES BETWEEN THE STRUCTURES.
PENETRATIVE-
CONTINUOUS OR PENETRATIVE STRUCTURE OCCURS ONLY WITHIN A DEFINABLE
REGION
LOCALIZED-
STRUCTURE OCCURS AS AN ISOLATED FEATURE.
DISCRETE-
