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These extrusive rocks are formed from magma at or above the surface of the planet, and generally display smaller mineral crystals, or no crystals at all, because of the rapid cooling environment in which they form. Chemically, an intrusive and extrusive rock could be identical, the only difference being the size of the mineral crystals they contain
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∙ 10y ago
Wiki User
∙ 14y agowhy are sill and lava flow important to geologists who reconstruct geologic history?
Wiki User
∙ 14y agoonly the sedimentary rock on one side of a buried lava flow will have been metamorphosed, while the rock on both sides of a sill will have been metamorphpsed
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How old is the palisade Sill?
The Palisade sill was formed at the end of the Triassic period. Scientists are still debating how it was formed, but it appears to have been made by a single huge lava flow that occurred as the monster continent of Pangea broke up.
Lava that cuts across rock layers hardens to form a feature called?
it is a sill
Is sill a type of lava flow?
A Sill is formed when a fluid rock (usually magma but it can be mud or salt) is squeezed in between the layers (usually horizontal) of older rocks before it solidifies in place. A Dike or Dyke is the opposite, here the fluid rock penetrates across the layering of the older rocks. Logically to get the material to form a Sill there must be an accompanying feeder Dyke.
What are five parts of a volcano?
There tends to be five main parts that make up a volcano. They include the magma chamber, the main vent, lava, the crater, and the pyroclastic flow , which is fast moving flow of hot gas and rock.
What are dikes laccoliths sills and lava plateau?
The first 3 are types of igneous intrusion. A Sill is magma inserted between bedding planes in a horizontal manner. A Laccolith is like a Sill but is lense shaped and domes up the overlying sediments where it is thickest (the lower boundary remains flat). A Dike is magma intruded vertically across bedding planes. A lava plateau is different as that forms where lava breaks through to the Earth's surface and floods over it horizontally, forming a large, flat area of land created by lava filling in all the valleys and other depressions.
How old is the palisade Sill?
The Palisade sill was formed at the end of the Triassic period. Scientists are still debating how it was formed, but it appears to have been made by a single huge lava flow that occurred as the monster continent of Pangea broke up.
Where is Set-tainte of the Kiowa buried?
Fort Sill, Oklahoma.
Where is the burial site of Geronimo?
Geronimo is buried at Fort Sill, Oklahoma.
Lava that cuts across rock layers hardens to form a feature called?
it is a sill
Slab that forms when magma squeezes between layer of rock?
A Sill is formed
What forms when lava flows horizontally across a layer of rock?
Forms of igneous rock are usually made. It is also known as lava rock and volcanic rock
Is sill a type of lava flow?
A Sill is formed when a fluid rock (usually magma but it can be mud or salt) is squeezed in between the layers (usually horizontal) of older rocks before it solidifies in place. A Dike or Dyke is the opposite, here the fluid rock penetrates across the layering of the older rocks. Logically to get the material to form a Sill there must be an accompanying feeder Dyke.
What are some geology key terms?
dyke - verticall lava through a rock. sill - horizontall lava through a rock. pillow lavas - pillows sold in asda which support your gullable head as you sleep.
What are five parts of a volcano?
There tends to be five main parts that make up a volcano. They include the magma chamber, the main vent, lava, the crater, and the pyroclastic flow , which is fast moving flow of hot gas and rock.
What are dikes laccoliths sills and lava plateau?
The first 3 are types of igneous intrusion. A Sill is magma inserted between bedding planes in a horizontal manner. A Laccolith is like a Sill but is lense shaped and domes up the overlying sediments where it is thickest (the lower boundary remains flat). A Dike is magma intruded vertically across bedding planes. A lava plateau is different as that forms where lava breaks through to the Earth's surface and floods over it horizontally, forming a large, flat area of land created by lava filling in all the valleys and other depressions.
Name one person buried at Chief's Knoll cemetery in Fort Sill OK?
Geronimo, the famous Native American leader and Apache warrior, is buried at Chief's Knoll cemetery in Fort Sill, Oklahoma. Geronimo fought against the U.S. government's policies towards Native Americans in the late 19th and early 20th centuries.
What are magma flow across layers of volcanic cone?
mama travels through volcanoes in what they call a vent
