DEFINITION MECHANICAL PRINCIPLE: deals with the physical properties of rocks and the significance of these properties in rock deformation.

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Presentation transcript:

DEFINITION MECHANICAL PRINCIPLE: deals with the physical properties of rocks and the significance of these properties in rock deformation.

DEFINITION FOLDS: are wavy undulations, bend, flexure or wrinkle in rocks.

Fold

Fold

DEFINITION FAULTS: are ruptures along which the opposite walls have moved past each other.

Fault

Fault

DEFINITION JOINTS: a break in a rock mass where there has been no relative movement of rock on opposite sides of the break.

Joint

Joint

DEFINITION UNCONFORMITY: an unconformity is a surface of erosion or non-deposition – that separates younger strata from older.

Unconformity

Unconformity

DEFINITION CLEAVAGE: is the property of rocks whereby they break along parallel surfaces of secondary origin. SCHISTOSITY: is a term applied to the variety of rock cleavage found in rocks that are sufficiently recrystallized to be called schist or gneiss.

DEFINITION CLEAVAGE: is the property of rocks whereby they break along parallel surfaces of secondary origin. SCHISTOSITY: is a term applied to the variety of rock cleavage found in rocks that are sufficiently recrystallized to be called schist or gneiss.

DEFINITION LINEATION: Lineation is expressed by the parallelism of some directional property in the rock.