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What are the parent rocks of gabbro?
The parent rocks of gabbro are basalt and peridotite. Gabbro is an intrusive igneous rock that forms when basaltic magma solidifies beneath the Earth's surface, while peridotite is a common mantle rock that can also be a source for gabbro.
Is gabbro a felsic rock?
No, gabbro is not a felsic rock. Gabbro is classified as a mafic rock due to its dark color and high content of iron and magnesium minerals, while felsic rocks are light-colored and have a higher silica content.
What are some examples of intrusive igneous rock?
Granite and gabbro are the two biggies, granite being formed underground by felsic magma, and gabbro being formed underground by mafic magma. Diorite and peridotite are two others.
What igneous rock has no visible crystals?
Obsidian is an igneous rock that has no visible crystals due to its rapid cooling process, which prevents crystal formation. It is often dark in color and has a glassy appearance.
Is obsidian an instrusive or extrusive igneous rock how do you know?
Obsidian is an extrusive rock and is formed from rapidly cooling magma. Obsidian is also known as volcanic glass and one can find only sub-microscopic crystals in it. This is because it was cooled too fastly for large crystals to form. If the material that obsidian consists of were an intrusive rock and had a lot of time to cool down, one would find that it would be composed of easily visible crystals.
Would gabbro or obsidian make a better arrowhead?
Obsidian
What is example of igneous rock?
Basalt and pumice.
What rock form from molten?
Rocks formed from solidified molten rock are classified as igneous rock. Examples would be basalt, granite, gabbro, pumice, obsidian, and rhyolite.
What clasts would you obtain if you crushed gabbro?
If you crushed gabbro, you would obtain clasts primarily composed of minerals such as pyroxene, plagioclase feldspar, and olivine. These minerals are common in gabbro, which is a coarse-grained igneous rock primarily made up of these mineral components.
What are the parent rocks of gabbro?
The parent rocks of gabbro are basalt and peridotite. Gabbro is an intrusive igneous rock that forms when basaltic magma solidifies beneath the Earth's surface, while peridotite is a common mantle rock that can also be a source for gabbro.
Is gabbro a felsic rock?
No, gabbro is not a felsic rock. Gabbro is classified as a mafic rock due to its dark color and high content of iron and magnesium minerals, while felsic rocks are light-colored and have a higher silica content.
Will obsidian flake in your hand?
Obsidian is a natural glass that can form sharp edges when broken, known as obsidian flakes. However, whether it flakes in your hand would depend on the force applied and the specific condition of the obsidian. Generally, obsidian will flake if enough pressure is applied to break it.
What is 1 example of an igneous rock?
One example of an igneous rock is granite. It forms when molten rock (magma) cools and solidifies beneath the Earth's surface, creating a coarse-grained rock composed mainly of quartz, feldspar, and mica minerals.
Could carbon-14 be used to date a stone arrowhead found at an ancient burial site?
A:Carbon-14 dating could not be used directly from the arrowhead itself. However, the bones associated with the arrowhead could be dated by this method, if they are sufficiently recent for this method. If the arrowhead is properly associated with the bones, you would then know its age.
What do you call an arrow with no arrowhead?
The answer could be pointless if it were to be a riddle.However, in real life, it would just be a stick.
Which is older a gabbro dike or a gray shale?
A gabbro dike is typically older than a gray shale. Gabbro is an igneous rock that forms from the cooling of magma intruding into existing rock formations. Gray shale, on the other hand, is a sedimentary rock that forms from the accumulation of sediment over time. Therefore, the gabbro dike would have formed before the gray shale was deposited.
What texture of obsidian?
Obsidian is an extrusive rock that cooled very rapidly without forming crystals. As a result, obsidian has a smooth, shiny texture of a thick piece of glass.
