Answer: The word SYNCLINE is defined as the bottom of a fold in the bent rock in the crust.
Explanation: A SYNCLINE is he bend in the rock strata. SYNCLINE is part of FOLDING which is a type of earth movement that results from the horizontal compression of layered rocks by inner forces of the earth along the plate boundaries. Syncline dips towards the crest at the bottom. Remember Syncline as in the bottom of the "s"