Definition 1 of 124
(low grade metamorphism)
Very fine grained Originally mudrocks and volcanic ash
Excellent, flat, rock cleavage (slaty)
Colour depends on specific minerals
- Black contains organic material
- Red contains iron oxide - Green contains chlorite
slate (shale)
phyllite (shale)
gneiss (shale)
schist (shale)
Definition 2 of 124
- Mainly water with other volatile components;
- Enhance migration of ions; act as catalysts
- Aid in recrystallization of existing minerals
- Hydrated minerals lose water during heating
Chemically active fluids
sedimentary structures
conglomerate and breccia
crystallization
,Definition 3 of 124
They account for about 5% (by volume) of Earth's outer 16km
- Contain evidence of Past environments, Sediment transport, Past life forms (fossils)
- Coal,
Petroleum and natural gas,
Iron, aluminum, manganese, fertilizer, and raw materials for the construction industry
sedimentary rocks
mechanical weathering
lodgement till
geothermal gradient
Definition 4 of 124
- Medium to coarse grained
- Platy minerals dominate
- The term schist also describes the texture (strongly foliated texture called schistosity)
- To indicate composition, mineral names are used (example: mica schist)
recrystalizaiton
glassy texture
differential weathering
schist (shale)
Definition 5 of 124
(component of magma)
- Include water vapour, carbon dioxide (CO2) and sulphur dioxide (SO2)
- Volatiles make magma lighter (so it rises)
solids
volatiles (gases dissolved in the melt)
shale, mudstone (clay), siltstone (silt)
pegmatitic texture (very coarse grained)
,Definition 6 of 124
- "plastered" down and compacted till deposited under the ice
- Stronger soil, low permeability
- Uniform in nature and very compact
- May be very difficult to excavate
dissolution
lodgement till
phyllite (shale)
soil erosion
Definition 7 of 124
The sediments deposited directly by a glacier
coal
glacial drift
basal slip
till
Definition 8 of 124
Steel mesh cages filled with small rocks, absorb wave energy.
glacial drift
gabions
salt flats
batholith
, Definition 9 of 124
Water-filled glacial trough along a coast
rhyolite
pumice
fjord
obsidian
Definition 10 of 124
Bank protection to prevent erosion
organic rocks
mass wasting
Revetment
shield volcano
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