What is situated apparently in reverse order, as strata when folded back upon themselves by upheaval. Inverted arch (Arch.), an arch placed with crown downward; -- much used in foundations called?

inverted — (Geol.) Situated apparently in reverse order, as strata when folded back upon themselves by upheaval. Inverted arch (Arch.), an arch placed with crown downward; -- much used in foundations. (Webster's 1913.)