Science Quiz / Metamorphic & Sedimentary Rock Terms

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Can you name the Metamorphic rock terms?

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DefinitionTerm
visible on hand sample scale
preferred linear alignments of elements such as minerals, bundles of microfolds, striations or grooves, or intersections of 2 planar features
caused mainly by heat
affect large volume of rocks
affects small volume of rocks
structures or minerals from parents rock that did not undergo metamorphosis when surrounding rock did
pre-metamorphic rock
neo & recrystallization as temperature and pressure decrease, typically during uplift or exhumation
mainly this section scale, involve grain to grain relationships
reorganization and movement of grain boundaries, most obvious in monomineralic rocks
mineral bounded by its own faces
increase of temperature with depth
a general summary of a particular depositional system, involving many individual examples from recent sediments and ancient rocks
arenite with > 50% feldpar
an indication of the efficiency of the transport medium, it is evaluated on the amount of matrix and the roundness & sorting of clasts
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
neocrystallization and recrystallization as temperature and pressure increase, typically during burial
all changes undergone by a sediment after its initial deposition, exclusive of weathering and metamorphism
moss growth, tree roots
set of processes that produce textural and mineralogical changes between diagenesis and melting
geographic area where sediments are/have accumulated
correlates to depth of burial, tensions, compression or shear
porosity developed developed when seiment is deposited
a size parameter used to describe the textures of clastic rocks by relating the variation in grain sizes within the rock, it affects porosity and permeability
a measure of how well fluid will flow through a rock
a special type of foliation where the planar features are closely spaced and regular, imparting a splitting property to rocks
results from radioactivity and magma emplacement
DefinitionTerm
type of sandstone with matrix minerals comprising 15% or less of the rock
3rd weathering method, hydration etc.
structures that prevade rock
a sedimentary rock dominated by particles of less than 0.004mm in diameter, lacking in laminations and >75% matrix
most commonly H2O or CO2, induce changes in rock, alter mineralogy
formation and growth of new minerals, most common, same as diagenesis but at higher temperatures
small scale effect of metasomatism
broken rock and mineral grains
chemically precipitated material that fills the spaces between framework grains in sedimentary rocks
exfoliation, frost acation, abrasion
few, large grains that occur when nucleation is inhibited
rocks that have undergone a change in form
crystal that gets its outline from neighbouring crystals
arenite with >50% lithic rock fragments
caused mainly by deviatoric stress
the finer-grained material that occurs between the coarser grains in a rock
crushing and breaking of rocks
controls the kinds of materials that will be available as sediment, the source area from which sediment is derived
pressure is main agent
porosity developed during diagenesis
metamorphism dominated by chemical changes
a process in which pressure is concentrated at the point of contact between 2 grains, causing the contact area to dissolve and allowing for subsequent migration of ions or molecule
very closely spaced alignment of minerals produced by directional stress
platy and acicular minerals intergrown in a nonfoliated, interlocking and locally radiating manner
type of sandstone characterized by a matrix of between 15 and 75%
grain boundaries do not equal crystal faces

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