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A relict, in geology, is a structure or mineral from a parent rock that did not undergo metamorphic change when the surrounding rock did, or a rock that survived a destructive geologic process. Some geologic processes are destructive or transformative of structures or minerals, and when a process is not complete or does not completely destroy certain features, the left-over feature is a relict of what was there before. For example, relict permafrost is an area of ancient permafrost which remains despite a change in climate which would prohibit new permafrost from forming or it could be a fragment of ancient soil or sediment found in a younger stratum. A relict sediment is an area of ancient sediment which remains unburied despite changes in the surrounding environment. In pedology, the stu

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  • Mineralrelikt (de)
  • Relicto (geología) (es)
  • Relict (geology) (en)
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  • Als Mineralrelikt bezeichnet man in der Mineralogie ein Mineral oder Mineral-Aggregat, das frühere Entwicklungsstadien eines Gesteins auch nach der partiellen Umwandlung eines Gesteins anzeigt. Nach der Auskristallisation kann ein Gestein durch veränderte Druck- und Temperaturbedingungen, beispielsweise infolge einer Metamorphose mehr oder weniger vollständigen Mineralumbildungen unterworfen sein. Mineralrelikte, also Reste des ursprünglichen Mineralbestandes, zeigen somit die primären Bildungsbedingungen eines Gesteins an. Man unterscheidet: (de)
  • En geología, el término relicto se refiere a estructuras o minerales de una roca madre que no sufrió cambios metamórficos cuando la roca circundante lo hizo, o a rocas que sobrevivieron a un proceso geológico destructivo. (es)
  • A relict, in geology, is a structure or mineral from a parent rock that did not undergo metamorphic change when the surrounding rock did, or a rock that survived a destructive geologic process. Some geologic processes are destructive or transformative of structures or minerals, and when a process is not complete or does not completely destroy certain features, the left-over feature is a relict of what was there before. For example, relict permafrost is an area of ancient permafrost which remains despite a change in climate which would prohibit new permafrost from forming or it could be a fragment of ancient soil or sediment found in a younger stratum. A relict sediment is an area of ancient sediment which remains unburied despite changes in the surrounding environment. In pedology, the stu (en)
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  • Als Mineralrelikt bezeichnet man in der Mineralogie ein Mineral oder Mineral-Aggregat, das frühere Entwicklungsstadien eines Gesteins auch nach der partiellen Umwandlung eines Gesteins anzeigt. Nach der Auskristallisation kann ein Gestein durch veränderte Druck- und Temperaturbedingungen, beispielsweise infolge einer Metamorphose mehr oder weniger vollständigen Mineralumbildungen unterworfen sein. Mineralrelikte, also Reste des ursprünglichen Mineralbestandes, zeigen somit die primären Bildungsbedingungen eines Gesteins an. Man unterscheidet: * stabile Relikte: Minerale oder Mineral-Aggregate, die auch noch bei veränderten Druck- und Temperaturbedingungen stabil bleiben; * instabile Relikte: Minerale oder Mineral-Aggregate, die bei veränderten Druck- und Temperaturbedingungen instabil werden, sich aber unter Umständen noch partiell erhalten können; * "gepanzerte" oder umkrustete Relikte: Minerale oder Mineral-Aggregate, die unter geänderten Druck- und Temperaturbedingungen selbst instabil geworden sind, können von stabilen Mineralen ummantelt oder umkrustet werden und zeichnen so die ursprüngliche Kristallform nach. (de)
  • En geología, el término relicto se refiere a estructuras o minerales de una roca madre que no sufrió cambios metamórficos cuando la roca circundante lo hizo, o a rocas que sobrevivieron a un proceso geológico destructivo. Algunos procesos geológicos son destructivos o transformadores de estructuras o minerales, y cuando un proceso no se completa o no destruye por completo ciertas características, la característica sobrante es un relicto de lo que había antes. Por ejemplo, el permafrost relicto es un área de permafrost antiguo que permanece a pesar de un cambio en el clima que prohibiría la formación de permafrost nuevo.​ O podría ser un fragmento de tierra antigua o sedimento encontrado en un estrato más joven. Un sedimento relicto es un área de sedimento antiguo que permanece sin enterrar a pesar de los cambios en el entorno. En pedología, el estudio de la formación y clasificación del suelo, el suelo antiguo encontrado en el registro geológico se llama paleosol, material formado en el pasado distante sobre lo que entonces era la superficie. Todavía se encuentra un paleosol relicto en la superficie y, sin embargo, se sabe que se formó en condiciones radicalmente diferentes del clima y la topografía actuales.​ En mineralogía, un mineral relicto es un mineral sobreviviente de una roca madre que se sometió a un proceso destructivo o transformador. Por ejemplo, la serpentinita es un tipo de roca formada en un proceso llamado serpentinización, en el que un mineral huésped produce un pseudomorfo, y el mineral original finalmente se reemplaza y / o destruye, pero aún está presente hasta que se complete el proceso.​ Los patrones ondulantes vistos en mármol son otro ejemplo de relictos de cambios litológicos en la caliza original. Dentro de la geomorfología, una forma de relieve relicta es una forma de relieve que se formó a partir de procesos geomórficos que actualmente no están activos. En el contexto escandinavo, esto a menudo implica que se formaron relieves terrestres relictos antes de la última glaciación y sobrevivieron bajo partes frías de la capa de hielo.​ El geomorfólogo climático estimó que el 95% de los accidentes geográficos de latitudes medias son relictos. ​ ​ (es)
  • A relict, in geology, is a structure or mineral from a parent rock that did not undergo metamorphic change when the surrounding rock did, or a rock that survived a destructive geologic process. Some geologic processes are destructive or transformative of structures or minerals, and when a process is not complete or does not completely destroy certain features, the left-over feature is a relict of what was there before. For example, relict permafrost is an area of ancient permafrost which remains despite a change in climate which would prohibit new permafrost from forming or it could be a fragment of ancient soil or sediment found in a younger stratum. A relict sediment is an area of ancient sediment which remains unburied despite changes in the surrounding environment. In pedology, the study of soil formation and classification, ancient soil found in the geologic record is called a paleosol, material formed in the distant past on what was then the surface. A relict paleosol is still found on the surface, and yet is known to have been formed under conditions radically different from the present climate and topography. In mineralogy, a relict mineral is a surviving mineral from a parent rock that underwent a destructive or transformative process. For example, serpentinite is a kind of rock formed in a process called serpentinization, in which a host mineral produces a pseudomorph, and the original mineral is eventually replaced and/or destroyed, but is still present until the process is complete. Within geomorphology a relict landform is a landform that took form from geomorphic processes that are not active at present. In a Scandinavian context, this is often meant to imply that relict landforms were formed before the last glaciation and survived it under cold-based parts of the ice sheet. Climatic geomorphologist Julius Büdel estimated that 95% of mid-latitude landforms are relict. (en)
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