noun
Etymology: fan (I) + fold, n.
: a fold of geologic strata in which both limbs are overturned forming an anticline if the limbs dip toward each other or a syncline if they dip away from each other
noun
Etymology: fan (I) + fold, n.
: a fold of geologic strata in which both limbs are overturned forming an anticline if the limbs dip toward each other or a syncline if they dip away from each other
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012