Definition | Term |
grain boundaries do not equal crystal faces | |
broken rock and mineral grains | |
correlates to depth of burial, tensions, compression or shear | |
porosity developed developed when seiment is deposited | |
porosity developed during diagenesis | |
mainly this section scale, involve grain to grain relationships | |
most commonly H2O or CO2, induce changes in rock, alter mineralogy | |
type of sandstone characterized by a matrix of between 15 and 75% | |
preferred linear alignments of elements such as minerals, bundles of microfolds, striations or grooves, or intersections of 2 planar features | |
a general summary of a particular depositional system, involving many individual examples from recent sediments and ancient rocks | |
formation and growth of new minerals, most common, same as diagenesis but at higher temperatures | |
caused mainly by deviatoric stress | |
neocrystallization and recrystallization as temperature and pressure increase, typically during burial | |
moss growth, tree roots | |
metamorphism dominated by chemical changes | |
pressure is main agent | |
crushing and breaking of rocks | |
all changes undergone by a sediment after its initial deposition, exclusive of weathering and metamorphism | |
exfoliation, frost acation, abrasion | |
platy and acicular minerals intergrown in a nonfoliated, interlocking and locally radiating manner | |
geographic area where sediments are/have accumulated | |
results from radioactivity and magma emplacement | |
a body of rock characterized by a particular combination of lithology, physical and biologoical structures that are different from the bodies above, below and laterally adjacent | |
a special type of foliation where the planar features are closely spaced and regular, imparting a splitting property to rocks | |
arenite with > 50% feldpar | |
pre-metamorphic rock | |
the finer-grained material that occurs between the coarser grains in a rock | |
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