Identifying Rocks. Igneous Rocks - Formation Magma is ejected from earth’s core Crystals form in...

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

Identifying Rocks. Igneous Rocks - Formation Magma is ejected from earth’s core Crystals form in...

Documents

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Igneous Rocks. The Nature of Igneous Rocks All igneous rocks are made of interlocking crystals of minerals that cool and crystallize our of magma. All