earthquakes: waves, faults and folds

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Earthquakes: Waves, Faults and Folds. By: Marg Dyan D. Fernandez Princess Amaryah P. Ejares NatSci1-A7. Earthquake. - PowerPoint PPT Presentation


Earthquakes: Waves, Faults and Folds

Earthquakes: Waves, Faults and FoldsBy: Marg Dyan D. FernandezPrincess Amaryah P. EjaresNatSci1-A7EarthquakeA shaking, trembling, or concussion of the earth, due to subterranean causes, often accompanied by a rumbling noise. The wave of shock sometimes traverses half a hemisphere, destroying cities and many thousand lives

Types:ForeshockAftershockBlind thrustInterplateIntraplate

Wavea disturbance (an oscillation) that travels throughspacein time, accompanied by the transfer ofenergy.

Waves travel and thewave motiontransfersenergyfrom one point to another, often with no permanent displacement of the particles of the mediumthat is, with little or no associated mass transport

FaultsA planar fracture or discontinuity in a volume of rock across which there has been significant displacement along the fractures as a result of earth movement.FaultlineThe surface trace of a faultFolds:When one or stack of originally flat and planar surfaces, such as sedimentary strata, are bent or curved as a result of permanent deformation.Types:Anticline linear strata normally dip away from axial center, oldest strata in centerSyncline- linear strata normally dip toward axial center, youngest strata in centerAntiform linear strata dip away from axial centre, age unknown or invertedSynform- linear, strata dip toward axial centre, age unknown or inverted.

Dome- nonlinear, strata dip away from center in all directions, oldest strata in center

Basin- nonlinear- strata dip toward center in all direction between horizontal layers on each side.