Ferromagnesian minerals (like olivine and pyroxene)that crystallize at high temperatures in Bowen's reaction series are generally much less susceptible to chemical weathering than quartz.

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Ferromagnesian minerals are more susceptible to chemical weathering than quartz because they contain iron and magnesium, which are more reactive with water and acids compared to the stable silica structure of quartz.

Ferromagnesian Minerals (Like Olivine and Pyroxene)that Crystallize at High Temperatures