Kolliderakrocka

Kolliderakrocka is a term found in Basque-language discussions of geology and planetary science, used to denote rock material associated with high-energy collision events. The word is typically interpreted as a compound referencing collisions and rock, and is often applied to rocks affected by impact processes, such as those created by meteorite impacts or other severe collisions on Earth or other planetary bodies.

In scientific usage, kolliderakrocka can refer to rocks that show features produced by shock metamorphism, including brecciation, deformation features in minerals, and in some cases high-pressure mineral phases. The term is sometimes used to describe broad classes like impact breccias or shocked rocks within impact structures, but its precise definition can vary among authors and educational materials. It is more commonly encountered in Basque-language resources and popular science writing than in international geology where terms like "impact rock" or "shock metamorphic rock" are standard. The concept helps illustrate how kinetic energy from collisions can alter rock texture and mineralogy, and it is often discussed in the context of craters, ejecta, and planetary geology.