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Chapter 12 - Layered Mafic Intrusions - Faculty web pages

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Layering<br />

layer: any sheet-like cumulate unit distinguished by<br />

its compositional and/or textural features<br />

uniform mineralogically and texturally<br />

homogeneous<br />

non-uniform<br />

uniform vary either along or across the<br />

layering<br />

graded = gradual variation in either<br />

mineralogy<br />

grain size - quite rare in gabbroic LMIs

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