identifying rocks. igneous rocks - formation magma is ejected from earth’s core crystals form in...
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![Page 1: Identifying Rocks. Igneous Rocks - Formation Magma is ejected from earth’s core Crystals form in cooling magma Crystals interlock into masses known as](https://reader031.vdocuments.us/reader031/viewer/2022032702/56649cb75503460f9497d50c/html5/thumbnails/1.jpg)
Identifying RocksIdentifying Rocks
![Page 2: Identifying Rocks. Igneous Rocks - Formation Magma is ejected from earth’s core Crystals form in cooling magma Crystals interlock into masses known as](https://reader031.vdocuments.us/reader031/viewer/2022032702/56649cb75503460f9497d50c/html5/thumbnails/2.jpg)
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
![Page 3: Identifying Rocks. Igneous Rocks - Formation Magma is ejected from earth’s core Crystals form in cooling magma Crystals interlock into masses known as](https://reader031.vdocuments.us/reader031/viewer/2022032702/56649cb75503460f9497d50c/html5/thumbnails/3.jpg)
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
![Page 4: Identifying Rocks. Igneous Rocks - Formation Magma is ejected from earth’s core Crystals form in cooling magma Crystals interlock into masses known as](https://reader031.vdocuments.us/reader031/viewer/2022032702/56649cb75503460f9497d50c/html5/thumbnails/4.jpg)
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
![Page 5: Identifying Rocks. Igneous Rocks - Formation Magma is ejected from earth’s core Crystals form in cooling magma Crystals interlock into masses known as](https://reader031.vdocuments.us/reader031/viewer/2022032702/56649cb75503460f9497d50c/html5/thumbnails/5.jpg)
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!
![Page 6: Identifying Rocks. Igneous Rocks - Formation Magma is ejected from earth’s core Crystals form in cooling magma Crystals interlock into masses known as](https://reader031.vdocuments.us/reader031/viewer/2022032702/56649cb75503460f9497d50c/html5/thumbnails/6.jpg)
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
![Page 7: Identifying Rocks. Igneous Rocks - Formation Magma is ejected from earth’s core Crystals form in cooling magma Crystals interlock into masses known as](https://reader031.vdocuments.us/reader031/viewer/2022032702/56649cb75503460f9497d50c/html5/thumbnails/7.jpg)
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