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Conclusions<br />

• Shap weathers by stoichiometric<br />

dissolution<br />

– Centred on reactive sites<br />

controlled by composition and/or<br />

strain<br />

– Leached layers must be < ~2 nm<br />

• Glen Feshie weathering products<br />

grow passively on grains from bulk<br />

waters<br />

– Some amorphous<br />

– Crystallises to form clays

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