Earth’s internal composition and Landforms — Social Science STD 7 — Question

The erosion and the deposition by sea waves give rise to different coastal landforms.

• The sea waves continuously strike against the rocks, as a result, cracks develop in them.
• Over the time, these cracks become larger and wider which are called 'Sea Caves'.
• When these caves become larger, only their roofs remain which form sea arches. Due to the constant erosion by the sea waves, the roof of these caves is broken and only the walls remain.
• This wall-like landform feature is called 'Stack'.
• The rocky coast rising almost vertically above the sea water is called 'Sea Cliff. The sea waves deposit

sediments along the seashores and form the 'Sea Beaches.