COASTAL Environments

COASTAL ENVIRONMENTS

BY: Yonase Kidane and Brodie Hughes

EROSION

•-HYDRAULIC PRESSURE: Compression of air and water Causing cracks throughIncreasing pressure

•ABRASION (CORRASION): When waves throws rocks colliding into the cliff causing it to break down and erode.

•ATTRITION:Rocks colliding within each other causing it tto break up into smaller peices

WAVE POUNDING AND CORROSION

Wave Pounding: Immense force of waves causing the cliffs to weaken.Corrosion: The acid in water causes the cliffs to erode

BY VAI

CAVES, ARCHES, STACKS AND STUMPS

CAVEHoles inside rocks by erosion causes it to

become bigger and bigger until an arch is created.

ARCH

Arch: A large gap in a cliff created by erosion.Stack: When a part of the cliff grows too big to withhold it’s pressure and weight and breaks.

STACKStack: When the weight above exceeds what the arch can sustain and collapses causing a stack to remainStump: The erosion made on stacks causing it to erode leaving a stump

BLOWHOLE

Created as sea caves grow landwards and upwards into vertical shafts and expose themselves towards the surface

BIBLIOGRAPHY http://en.wikipedia.org/wiki/Erosion http://en.wikipedia.org/wiki/Blowhole_(geolog

y) Classmates Images:

Google Images