The structure is an abstraction to describe the framework that makes up the fold, but rarely does an anticline completely fit the theoretical description of the structure, preserving all its strata and without significant alterations in them. Only in exceptional cases, such as folds that were fossilized recently formed and are now being exhumed by erosion, can we find this situation, then we say that it is an original fold. But it is normal to find anticlines affected by erosion processes that have lost part of their materials and may even have been opened, gutted, to offer an inverse image of the structural arrangement.
For this reason, when the folds are conforming with the structure and present with few adjustments the disposition that the structure assigns to the relief, they are usually referred to as original. When the adjustments are greater, but still maintain the features that the structure provides to the relief, some authors speak of almost-original or, in Latin terms penioriginal. When an anticline fold has lost its upper strata but those existing at lower levels express the geometry and the original topographic form, the anticline conforms to the structure, we then say that it is a derived anticline. When the anticline has been dismantled, its strata do not draw the hinge that has disappeared and the topographic form does not respond to the structure, the anticline is non-conforming and presents an inverted relief. However, in all these cases the anticline structure determines the shape of the relief, which is why we speak of structural relief. The relief forms that the anticline structure can present are:
• - Compliant anticlinal vault, shaped like a ridge closed by a rigid layer that constitutes the vault. The most common type is that which appears in the Jurassic style of relief (because it characterizes the region of Jura&action=edit&redlink=1 "Jura (coordillera) (not yet written)")) and has served to provide the nomenclature of the main characteristics of these folds. Thus the anticline ridge is called mont, which can be cut perpendicular to its axis by a cluse (in Spanish it can be translated as sickle; although, once the scientific name is recognized, it is preferable to pronounce "cluse" than "clis"), although it should be taken into account that the cut is not always perfectly perpendicular, but can be oblique or sinuous but always transverse to the fold. Cataclinal streams can be installed on the flanks, which descend following the dip, these are the ruz, which end up forming the strata of the flank in triangular facets or arches, the Chevrons, (which in Spanish have been translated in various ways: gallons, crestones...). It is common that some of the more resistant outer layers, removed at the hinge, remain on the flank, forming ridges, which are attached to the anticline ridge. When materials of different competence "Competition (geology)") alternate on the flank, these ridges are separated from the anticline ridge or from each other by depressions parallel to the axis of the fold, these are orthoclinal depressions. Depressions that also, although without such clear continuity, can appear behind the arches of the chevrons. Anticlinal vaults can appear, however, in many other types of reliefs, whether Appalachian, exhumed folds, complex styles, etc.
• - Non-conforming anticline, inverted, forming a depression in the area corresponding to the core, dominated by ridges formed on the flanks. In the Jurassic style it is called combe. For combe to exist, the core of the anticline must be made up of less competent materials "Competence (geology)") than the external ones. Thus, either because the fractures of the hinge allow a rapid attack, or because of the embedding of ruz that reaches the core, or because a diapiric ejection has burst the fold, due to attack from a cluse, or because the hinge has been eliminated as the fold was formed, erosion has progressed in the core, respecting the flanks that are formed into ridges. In the event that strata of different consistency appear on the flanks, orthoclinal depressions appear between the ridges formed in the most competent materials. As in the previous case, the inverted anticline can appear in various styles of folds. It is normal in the Appalachian style and common in inverted styles.
• - Annular combe, When an anticline has been dismantled, opened in combe, but a resistant stratum in the core of the fold reproduces the anticline ridge, it forms a derived anticline, which rises above an orthoclinal depression that surrounds it, and dominated by the crests of the flanks, or of hanging synclines that frame it. It is common in inverted folding reliefs.
• - Anticlines razed. It is the extreme case that the anticline has been devastated by an erosion surface, on which new dismantling processes subsequently act that highlight the most resistant layers and fit into the depressions. Thus, a relief of concentric ridges is formed, separated by depressions. This form is characteristic of Appalachian reliefs.