Identifying Rocks
Identifying Rocks. Igneous Rocks - Formation Magma is ejected from earth’s core Crystals form in cooling magma Crystals interlock into masses known as.
Dec 16, 2015
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Identifying RocksIdentifying Rocks
Igneous Rocks - FormationIgneous Rocks - Formation
Magma is ejected from earth’s core
Crystals form in cooling magma
Crystals interlock into masses known as igneous rocks
Magma is ejected from earth’s core
Crystals form in cooling magma
Crystals interlock into masses known as igneous rocks
Igneous Rocks - IdentificationIgneous Rocks - Identification
the interlocking texture of the grains
the presence of vesicules (holes) in extrusive igneous rocks
may be dark-colored and heavy
may display two grain sizes, one much larger than the other
the interlocking texture of the grains
the presence of vesicules (holes) in extrusive igneous rocks
may be dark-colored and heavy
may display two grain sizes, one much larger than the other
Sedimentary Rocks - FormationSedimentary Rocks - Formation
Other rocks (igneous, metamorphic) or shells are weathered over time
Can be formed from compaction of these sediments
…or can be formed by crystallization of dissolved minerals
Other rocks (igneous, metamorphic) or shells are weathered over time
Can be formed from compaction of these sediments
…or can be formed by crystallization of dissolved minerals
Sedimentary Rocks - IDSedimentary Rocks - ID
grains cemented together the presence of fossils light-colored and light
weight may display interlocking
grains but is very light weight
Layers!
grains cemented together the presence of fossils light-colored and light
weight may display interlocking
grains but is very light weight
Layers!
Metamorphic Rocks - FormationMetamorphic Rocks - Formation
“Metamorphosis” = change
Sedimentary or Igneous Rocks that have been changed by intense heat or pressure
“Metamorphosis” = change
Sedimentary or Igneous Rocks that have been changed by intense heat or pressure
Metamorphic Rocks - IDMetamorphic Rocks - ID
the interlocking texture of large grains
foliation (layering) - layers likely “bent”
banded light and dark colors
the interlocking texture of large grains
foliation (layering) - layers likely “bent”
banded light and dark colors
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