Horizontal beds or sheets has produced folded rocks in the earth's crust.
Step-by-step explanation:
Folds which occur in a rock causes the rock to bend and it does not break and it causes to change the shape of the rock because of the pressure caused by the external factors or the pressure of the tectonic plates. They are mostly formed in the river or on the coasts. These are mostly the reason of the sediments that have collected in the flat horizontal sheets.