decompression causing melting

Answer:

generally occurs in upper mantle, rock stays solid because of great pressure on it, therefore with less pressure less melting

volatiles causing melting

Answer:

chemicals called volatiles mix with hot mantle rock

heat transfer from rising magma causing melting

Answer:

when magma rises and brings heat to the continental crust, heat flows into surrounding rocks and causes melting

what magma is made of

Answer:

silicon and oxygen and varying Al, Ca, Na, K, Fe, and Mg

ultramfic magma

Answer:

lower amount of silica, very mafic (type of magma)

source rock composition

Answer:

concept that if you composition of melt is the same as composition from solid

cooling time of magma is controlled by these 3 things

Answer:

depth of intrusion, shape and size of magma body, presence of circulating groundwater

tachylite

Answer:

bubble free mass with 80% mafic glass

scorcia

Answer:

glassy mafic volcanic rock that has abundant vesicals

protoclastic rocks

Answer:

fragmental rocks made out of debris that have been blasted out of a volcano