Influence of Geological Structure Flashcards
lithology meaning
The geological structure is the way that rocks are folded or tilted -
Lithology can refer to any of the following characteristics:
Strata
layers of rock
Bedding planes
horizontal cracks created by pauses in rock formation
Horizontal bedding planes ;lead a steep vertical cliff faces
Joints
vertical cracks caused by tectonic movement or contraction
Vertical joints are opened up by weathering leaving large slabs
Folds
the result of pressure during tectonic movement causing the rock strata to fold
Faults
the result of stress or pressure causing it to fracture
Dip
the angle of the rock strata
You may be asked in the exam to explain the formation of a particular cliff profile. It is essential that you consider the lithology of the cliff face but also the other processes which act upon a cliff including
Hydraulic action and abrasion
Subaerial processes
Wave type