overgangskjerne

Overgangskjerne is a Norwegian term that translates roughly to “transition core” or “core of transition.” In scientific and technical writing, it is used to denote a central region within a system where a transition between two states, phases, or regimes occurs. The exact meaning and scope of the term vary depending on the discipline and the context in which it is used.

In materials science and physics, overgangskjerne may refer to the zone around a moving phase boundary where properties change more rapidly or differently than in the surrounding material. This can include changes in crystal structure, composition, or diffusion characteristics as a phase transformation progresses. The concept emphasizes a localized region that mediates between distinct states.

In geology and related earth sciences, the term can describe a transitional zone within rocks or at mineral boundaries where temperature, pressure, or chemical conditions shift gradually, producing gradational changes in mineralogy or texture. The overgangskjerne in this sense highlights the core area where the transition from one metamorphic or magmatic state to another is most pronounced.

Usage notes: overgangskjerne is primarily used in Norwegian-language texts and is a descriptive term rather than a fixed technical definition. Its precise interpretation depends on the surrounding methodological and disciplinary context. Related ideas include transition zones, phase boundaries, and boundary layers, which describe interfaces where state changes occur.