[Answer] Lava flows are typically finer grained than intrusive igneous rocks. Why? Misfit Menu Study Guide

Answer: the extrusive magma cools quickly so the mineral grains do not have time to grow flying biscuit (service)
Lava flows are typically finer grained than intrusive igneous rocks. Why? Misfit Menu Study Guide

Extrusive igneous rock also known as volcanic rock is formed by the cooling of molten magma on the earth’s surface. The magma which is brought to the surface through fissures or volcanic eruptions rapidly solidifies.Hence such rocks are fine- grained or even glassy.Basalt is the most common extrusive igneous rock and forms lava flows lava sheets and lava …

Magma – Wikipedia

Komatiite (/ k oʊ ˈ m ɑː t i. aɪ t /) is a type of ultramafic mantle-derived volcanic rock defined as having crystallised from a lava with magnesium oxide content higher than 18% by weight. Komatiites have low silicon potassium and aluminium and high to extremely high magnesium content. Komatiite was named for its type locality along the Komati River in South Africa and frequently …

Basalt Igneous rock Composition Mafic: plagioclase amphibole and pyroxene sometimes feldspathoids or olivine. Basalt is a mafic extrusive igneous rock formed from the rapid cooling of lava rich in magnesium and iron exposed at or very near the surface of a terrestrial planet or a moon. More than 90% of all volcanic rock on Earth is basalt and the eruption of basalt lava is observed by …

Carbonatite (/ k ɑːr ˈ b ɒ n ə t aɪ t /) is a type of intrusive or extrusive igneous rock defined by mineralogic composition consisting of greater th…

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