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Relic textures refer to those inherited from the preexisting rocks. Common relic
textures include a preexisting mineral shielded from reaction by a new stable
mineral overgrowth, or mineral layering that represents sedimentary layering.
Folds or ...
Rocks behave under these conditions much like fluids. The first rarefactions
develop along the target-projectile interface and later the projectile itself.
Decompression leads to the ejection of fluidized rock as a hot jet that, according
to some ...
Nepheline is the characteristic mineral of alkaline plutonic rocks, particularly
nephelinesyenites and nepheline- Nepheline from Litchfield. Maine By courtesy
of the Freld Museum of Natural History, Oicaoo photograph John H Gerard — EB
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