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Gennadij [26K]
3 years ago
11

construct a process by which rocks may change forms. Rock melts. Sediments deposit into a basin. Magma cools and solidifies unde

rground. Weathering occurs. Intrusive igneous rock forms. Sedimentary rock forms.

Biology
1 answer:
nignag [31]3 years ago
4 0

Answer:

Las rocas ígneas (del latín ignis, fuego)  también nombradas magmáticas, son todas aquellas que se han formado por solidificación de un de material rocoso, caliente y móvil denominado magma; este proceso, llamado cristalización, resulta del enfriamiento de los minerales y del entrelazamiento de sus partículas. Este tipo de rocas también son formadas por la acumulación y consolidación de lava, palabra que se utiliza para un magma que se enfría en la superficie al ser expulsado por los volcanes.

Cuando la solidificación del magma se produce en el seno de la litósfera, la roca resultante se denomina plutónica o intrusiva; si el enfriamiento se produce, al menos en parte, en la superficie o a escasa profundidad, la roca resultante se denomina volcánica o extrusiva y estos, a su vez, se subdividen en familias a partir delas diferentes texturas, asociaciones minerales y modo de ocurrencia. Las formas que adoptan los cuerpos ígneos durante su cristalización delimitan diferentes estructuras ígneas.

Existen diversos criterios para clasificar una roca ígnea, cada uno de ellos con objetivos definidos, como la ocurrencia de las rocas, el tamaño de grano, la textura y estructura, el contenido mineral o la composición química.

Rocas ígneas intrusivas o plutónicas

Son rocas formadas en el interior de la corteza terrestre. Cuando un magma se enfría bajo la superficie lo hace más lentamente, permitiendo un mejor desarrollo de los cristales, que debido a eso alcanzan tamaños que pueden ser observados a simple vista, generalmente abarcan grandes extensiones de terreno y llegan a la superficie terrestre mediante procesos orogénicos (deformaciones tectónicas) o mediante procesos externos de erosión. Dentro de este tipo de rocas, algunos autores reconocen una clase intermedia, la hipoabisal, que incluye a las rocas que han cristalizado a una profundidad moderada y se presentan en forma de filones o diques, rellenando grietas; son mucho menos abundantes que las plutónicas y se encuentran casi siempre asociadas a ellas.

Explanation:

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