Rocas ígneas volcánicas - Aragosaurus
Transcript of Rocas ígneas volcánicas - Aragosaurus
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Rocasígneasvolcánicas
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Basalto
Esunarocaformadaporcristalesdetamañomacroscópicoincluidosenunamatrizsincristalizar.Sucolorobscuro,gris-negro.Eselequivalentealgabro
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PlayasnegrasdeTenerife
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Lacalzadadelosgigantes
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Riolita
Esunarocaformadaporcristalesdetamañopequeño,generalmenteindis?nguiblesasimplevista.Sucoloresclaroquesuelevariardegrisarojizo.
Eselequivalentealgranitoenrocasplutónicas
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Pumita
Eslapopular“Piedrapómez”.Esunarocaconelevadaporosidad,quellegaapermi?rleflotarenelagua.
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Obsidiana
Decolornegrobrillanteyvítreo.Fracturaconcoidea
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Rocassedimentarias.Seformanenlacortezaterrestreapar?rdematerialprovenientedeladestrucciónderocasprecedentes
oporlaacciónbiológica
Rocasdetrí?casRocasdeprecipitaciónquímicaRocasdeacumulaciónorgánica
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Esunrocasedimentariaformadaporclastosde>2mm,peropuedensermuchomayores
Conglomerado
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LosMallosdeRiglos
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Arenisca
Esunrocasedimentariaformadaporpar[culasdetamañoarena(0,063-2mm)
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Cas?llodePeracense.Ródeno,Teruel
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Lu?ta
Esunrocasedimentariaformadaporpar[culasdetamañoarcilla(<0,002mm)
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Lu?ta
Formalos[picasTierrasmalas(“badlands”)fuertementeerosionadas