By definition, these structures obey the usual principle of superposition and are convex-up.
Some non-standard types of these entities that can result from non-planar faulting are known as rollovers and ramps. Concentric, symmetrical sets of these can be created by diapirism. Extreme examples of these can form through so-called aneurysms, which usually occur when isostacy responds to erosion near the center of a river. Their tops are relatively impermeable, so folds in them are highly sought as structural traps for valuable minerals like petroleum. By definition, these structures obey the usual principle of superposition and are convex-up. For 10 points, name these features of the Earth in which strata curve upward to form a ridge and that are often surrounded by their converses, synclines.
Some non-standard types of these entities that can result from non-planar faulting are known as rollovers and ramps.
anticlines [prompt on domes]