|Compare anticline a downward fold of stratified rock in which the strata slope towards a vertical axis|
|[C19: from |
|syncline (sĭn'klīn') Pronunciation Key
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A fold of rock layers that slope upward on both sides of a common low point. Synclines form when rocks are compressed by plate-tectonic forces. They can be as small as the side of a cliff or as large as an entire valley. Compare anticline.