This enabled the pneumatolytic and hydrothermal solutions to deposit their dissolved mineral contents.
2.
Pseudobrookite forms as pneumatolytic deposition and alteration within titanium-rich volcanic rocks such as andesite, rhyolite or basalt.
3.
It is formed by crystallizing under low pressure and high temperature from a pneumatolytic phase along fractures or within near-surface miarolitic cavities of the rhyolite.
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