Inhoudsopgave
Hoe ontstaat rood gesteente?
IJzer(III)oxide, vaak in de vorm van het mineraal hematiet, kleurt gesteente rood of bruinig. Vooral in een droog klimaat ontstaat vaak gesteente met een rossige kleur als gevolg van de oxiderende werking van de atmosfeer.
Wat zit er in een steen?
De meeste gesteenten bestaan vooral uit silicaten, mineralen die silica bevatten. Bijna alle stollingsgesteenten en de meeste sedimentaire en metamorfe gesteenten vallen hieronder. Een belangrijke uitzondering is carbonaatgesteente, dat uit carbonaten bestaat (verbindingen van carbonaat, CO32−).
Can igneous rocks turn into sedimentary and metamorphic?
Igneous rocks are primary rocks, and other rocks form from these rocks. Igneous rocks can be changed into sedimentary or metamorphic rocks. The fragments derived out of igneous and metamorphic rocks form into sedimentary rocks. Sedimentary and igneous rocks themselves can turn into metamorphic rocks.
How does basalt turn into metamorphic rock?
Metamorphosed basalt from an Archean greenstone belt in Michigan, US. The minerals that gave the original basalt its black colour have been metamorphosed into green minerals. Intense heat or great pressure transforms basalt into its metamorphic rock equivalents.
What type of rock is basalt?
Basalt: Basalt is characteristically a dense, black, massive rock, high in calcium and iron-magnesium- bearing minerals and low in quartz content. Great examples of basaltic lava flows can be found in the Black Rock Desert, Millard County.
What are metamorphic basaltic rocks used for?
Metamorphosed basalts are important hosts for a variety of hydrothermal ores, including deposits of gold, copper and volcanogenic massive sulfides. The common corrosion features of underwater volcanic basalt suggest that microbial activity may play a significant role in the chemical exchange between basaltic rocks and seawater.