Biochemical limestone is when the calcium carbonate is locked into the fossil shells and skeletons of marine organisms.
But chemical limestone is when the calcium carbonate is in the form of calcite mineral crystals.
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Answer:
when discharge is high vertical erosion erodes the river bed and larger sediments are transported by transaction the river channel is at its widest and defence as a flow towards its mouth the position is the main process in this part of the river which creates large floor plans and deltas
Answer:

Explanation:
The diagonal of a square is x units.
Let the side of a square is s.
Using pythagoras,

The area of the square is,
A = s²
So,

So, the area of a square is
sq units.
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