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Earth & Space Chapter 6
6.1 and 6.2
34
Geology
11th Grade
10/21/2014

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Term
when sediments become glued together, they form
Definition
sedimentary rock
Term
physical and chemical processes that break rock into rock & mineral fragments are
Definition
sediment
Term
the removal and transport of sediment
Definition
erosion
Term
wind, moving water, gravity, and & glaciers
Definition
four main agents of erosion
Term
when minerals in rock are dissolved or chemically changed
Definition
chem weathering
Term
minerals remain chemically unchanged rock fragments break off the solid rock along fractures or grain boundaries
Definition
physical weathering
Term
when sediments transported by water & wind deposit in layers with largest grains/particles in the bottom layer
Definition
sorted deposits
Term
when a mix of sediments is "dumped in a pile" by glaciers & landslides
Definition
unsorted deposits
Term
the physical & chem processes that transform sediments into sedimentary rocks; begins with compaction
Definition
lithification
Term
bends rock grains together
Definition
compaction
Term
compacts more than sand
Definition
mud
Term
commonly found in spaces between sand grains in sedimentary rock
Definition
groundwater, oil, & natural gas
Term
when new minerals grow between sediment grains & glues them together into solid rock
Definition
cementation
Term
examples of minerals formed in cementation
Definition
iron oxide or calcite
Term
horizontal layering that ranges in thickness from a few mm. to several meters
Definition
bedding
Term
bedding that shows heavier/courser particles in bottom layers
Definition
graded bedding
Term
bedding formed as inclined layers of sediment that are deposited across a horizontal surface
Definition
cross-bedding
Term
on beaches & sandbars
Definition
small-scale cross-bedding
Term
formed by migrating sand dunes
Definition
large-scale cross-bedding
Term
small ridges of sediment formed by wind or wave reaction or by a river current
Definition
ripple marks
Term
contain gravel-sized rock & mineral fragments, form any kind of rocks
Definition
course-grained clastic rocks
Term
based on grain size
Definition
classification of clastic sedimentary rocks
Term
contain rounded gravel pieces because they have traveled farther
Definition
conglomerates
Term
contain angular gravel pieces because they have been deposited closer to their source
Definition
brecias
Term
contain sand-sized rock & mineral fragments
Definition
medium-grained clastic rocks
Term
percentage of open spaces between rock's grains
Definition
porosity
Term
sandstone's porosity makes it valuable as underground reservoirs of
Definition
oil, natural gas, & groundwater
Term
formed from deposits of loose sediments on Earth's surface; most common sedimentary rocks
Definition
clastic
Term
evaporates most commonly form in arid (dry) regions & in areas of low water flow
Definition
chem sedimentary rocks
Term
formed from remains of once-living organisms
Definition
biochemical sedimentary rocks
Term
most abundant biochemical sedimentary rock
Definition
limestone
Term
many types of limestone contain
Definition
fossils
Term
lithifies into the biochemical sedimentary rock chert
Definition
siliceous ooze
Term
process that produces clastic sediments
Definition
physical weathering
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