3.7.9 Anticline (Antiklinal)
3.7.9.1 An anticline is a fold, usually convex upwards, whose core contains the stratigraphically oldest rocks. It is a structural form element which need not be, or have been, a landform.
3.7.9.2 Anticline could be a genetical term for a positive structural feature.
3.7.9.3 No limitations are placed on the dimensions of an anticline (see Section 3.7.9.7.c).
3.7.9.4 Anticlines are mappable with the help of geological and/or geophysical methods.
3.7.9.5 An anticline can include several smaller structural elements.
3.7.9.6 An anticline can be given a formal or an informal name in accordance with the "general rules for naming and defining geological units" (Chap. 2) and the rules for naming geological form units (Section 3.7.1). In the compound name, a proper name (Section 2.2.2) is placed between the words "the ... Anticline" (formal).
3.7.9.7.a An antiform (antiform) is a fold which is convex upwards, and in which the beds are inverted or their relative age is unknown.
3.7.9.7.b An anticlinorium (antiklinorium) is a positive structural form element of regional size, made up of several smaller folds, and whose core contains the stratigraphically oldest rocks.
3.7.9.7.c An arch (hvelv) is a broad, open antiform of regional size (see arc, Section 3.8.2.7).
3.7.9.7.d Antiforms, anticlinoria and arches can be given formal or informal names.
3.7.9.8 Examples: The Salangen Antiform (Gustavson 1972) is a Caledonian "cross-fold". Several of the windows in the Caledonian nappe region are formed above antiformal structures of arch character, e.g. the Komagfjord window, the Børgefjellet window, the Tømmeråsen window (called "the Tømmerås anticline" by Peacey (1964)) and the Atnsjøen window (Sigmond et al. 1984). The „stensjø anticlinorium is a basement structure (Graversen 1984).
3.7.9.9 Key reference: Bates & Jackson (1980).