- an elongated fold in sedimentary rock that resembles an arch in which rock layers slope downwards in opposite directions from the central axis (the apex of the fold)
A subsurface fold structure in which beds dip in opposite directions from a common ridge or axis A fold that is concave downwards See illustration in fold
A geological term describing a fold in the earth's surface with strata sloping downward on both sides from a common crest Anticlines frequently have surface manifestations like hills, knobs, and ridges At least 80 percent of the world's oil and gas has been found in anticlines
(a) [landform] A unit of folded strata that is convex upward and whose core contains the stratigraphically oldest rocks, and occurs at the earth's surface In a single anticline, beds forming the opposing limbs of the fold dip away from its axial plane Compare - monocline, syncline, fold SW & HP (b) [structural geology] A fold, at any depth, generally convex upward whose core contains the stratigraphically older rocks GG
A fold in layered rocks originating below the surface in the form of an elongated dome Anticlines make excellent drilling prospects since any oil in the deposit will naturally rise to the highest point of the structure because oil has a lower specific gravity than water