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Randomly arranged interlocking crystals and no fossils :)
Tanya Gaylord
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How do you classify igneous rocks from other types of rock?
Igneous rocks are identified by first looking at the color index. Felsic igneous rocks contain mostly potassium feldspar. Intermediate igneous rocks contain mostly plagioclase feldspar. Mafic igneous rocks contain pyroxene, olivine, and plagioclase feldspar. Ultra mafic igneous rocks contain mostly olivine. Then igneous rocks are identified based on texture. For example, the texture of igneous rocks can be aphanitic, pegmatitic, phaneritic, glassy, vesicular, etc.
Why are igneous rocks not contain fossils?
yes
Which rocks contain fossils sedimentary or igneous?
sedimentry
Why can't geologist use the carbon-14 method to date igneous rocks?
Igneous rocks do not contain much carbon.
Do igneous rocks usually contain fossils?
Igneous rock is composed of lava or magma that has cooled and solidified. Fossils are only found within the various strata of sedimentary rock.
Does an igneous rock contain iron?
Most igneous rocks would likely contain a varying amount of iron.
How do you classify igneous rocks from other types of rock?
Igneous rocks are identified by first looking at the color index. Felsic igneous rocks contain mostly potassium feldspar. Intermediate igneous rocks contain mostly plagioclase feldspar. Mafic igneous rocks contain pyroxene, olivine, and plagioclase feldspar. Ultra mafic igneous rocks contain mostly olivine. Then igneous rocks are identified based on texture. For example, the texture of igneous rocks can be aphanitic, pegmatitic, phaneritic, glassy, vesicular, etc.
Why are igneous rocks not contain fossils?
yes
Does rhyolite igneous rock usualy contain diamonds?
No.
Which rocks contain fossils sedimentary or igneous?
sedimentry
How are igneous and sedimentary alike?
Both are composed of minerals. Some sedimentary rocks contain pieces of igneous rocks.
Do extrusive igneous rocks contain crystals?
No. Pure volcanic glasses contain no crystalline structure.
Rocks which contain a variety of minerals are examples of a?
Igneous Rocks
What do cratons do?
Cratons contain the ancient crust of igneous rocks.
Why can't geologist use the carbon-14 method to date igneous rocks?
Igneous rocks do not contain much carbon.
Do all extrusive igneous rocks contain crystals?
No. Pure volcanic glasses contain no crystalline structure.
Do igneous rocks usually contain fossils?
Igneous rock is composed of lava or magma that has cooled and solidified. Fossils are only found within the various strata of sedimentary rock.
