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Coal is formed from ancient plants that were buried under layers of sediment?
Wiki User
∙ 14y ago
yes, this is the dominant theory. There is also a theory that coal comes from organic compounds naturally existing in the earth (look up "abiogenic petroleum"). There are problems with both theories, but the second is rarely even mentioned in schools today.
Wiki User
∙ 14y ago
Wiki User
∙ 13y agoThe main component of plant material is sucrose, glucose and cellulose. These are sugar molecules, and when they are heated, the Oxygen and Hydrogen atoms combine to form water. This evaporates away, leaving pure carbon, and with heat and pressure this is turned into coal.
Wiki User
∙ 10y agotrue
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Sedimentary rocks?
Sedimentary rocks are formed by the accumulation of sediments.
When sediment is deposited in layers what rock is formed?
sedimentary
When sediment is deposited in layers what rock is formed explain your answer?
sedimentary
What is organic sedimentary?
a rock formed by unconsolidated sediment deposited in layers
When sediment is deposited in layers and compacted?
...sedimentary rock is formed. OR ...strata is formed. Try either.
How do layers in sedimentry rocks form?
The land where the rock was formed was underwater when the rock was formed. Over the years layers of Sediment sank to the bottom. Pressure formed the sediments into rock.
Rocks that have layers or clasts were formed by what?
Is it sediment being compressed until it becomes rock
What are the layers formed as sediment builds up over a very long time called?
Strata
What is level land that is formed when a river overflows and leaves layers of sediment called?
Flood plain.
Why was sedimentary rock named sedimentary rock?
Because the rocks are formed by using layers of Sediment.
Why is it necessary to drill to very great depth oil is recovered?
Simply because oil-bearing rock was formed millions of years ago, and is buried deep in the Earth's crust, due to being covered by successive layers of sediment.
How are layers formed in a Sedimentary Rock?
The layers are formed by the deposition of sediments carried by wind, water, or ice.
