It doesn't necessarily gain silica, its just that minerals that contain very little silica and a lot of other elements instead crystallize, resulting in a magma that has more silica than it did before because less silica is removed than say, iron and magnesium.
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I hope you make new videos, I've found your presentation style to be pleasant and easy to follow with good information. 👍
Ok so the magma starts out basalt, but it gains silica as it makes it's way upward. ?
It doesn't necessarily gain silica, its just that minerals that contain very little silica and a lot of other elements instead crystallize, resulting in a magma that has more silica than it did before because less silica is removed than say, iron and magnesium.
i think i'll wait on holographic imaging to see this more clearly...