You are walking along a rugged coastline in british columbia, canada. as the tide goes out you realize there is a beautiful flat surface that is nearly as smooth as a highway and underlain by 1-2cm of gravel sitting on solid rock. the tide has exposed a

Wave-Cut Platform

Explanation:

A wave-cut platform, or shore platform is the thin flat area frequently found at the bottom of a shore cliff or along a river, bay, or sea produced by erosion.

When they become apparent as huge areas of flat rock, wave-cut platforms are often most noticeable at low tide.

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