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Intrusive (beneath ground), Extrusive (above ground) - Coggle Diagram
Intrusive (beneath ground)
texture
pegmatitic. massive crystals
phaneritic. small visible crystals
fine vs course
trapped air bubbles "frothy" pores
composition
intermediate
green, grey, brown
mafic
higher is mag and iron, lower in silica
black and darker colors
felsic
higher in silica lower in mag and iron
color
pink or white
Extrusive (above ground)
texture
porphyritic. slow cool then rapid cool
Phaneritic. small visible crystals
Aphanitic. tiny almost invisible
Pyroclastic. Volcanic eruptions. ash and bombs
composition
felsic
higher is silica and lower in mag and iron
color
pink or white
intermediate
mafic
color
black and dark colors
higher in mag and iron lower in silica