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A coal seam can be used as a key bed in geology to help determine the relative age of surrounding rock layers through the principle of superposition. Key beds are distinctive, widespread, and easily recognizable rock layers that can be correlated across different locations. By identifying a coal seam as a key bed, geologists can use it as a reference point to establish the relative ages of other rock layers in the area. This can help in understanding the geological history and sequence of events in a particular region.
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How a coal seam might be used as a key bed?
A coal seam can be used as a key bed in stratigraphy by acting as a recognizable and widespread marker layer in the rock sequence. Key beds help correlate different rock layers in different locations based on the consistent presence of a specific marker bed, such as a coal seam, allowing geologists to establish the relative ages of rocks in various areas.
What geologist wants to locate a horizontal coal bed on a soil-covered slope where soil creep is active A distinctive sandstone bed underlies the coal bed On the basis of weathered sandstone fragm?
A geologist would typically use methods such as surface mapping, seismic testing, and borehole drilling to locate a horizontal coal bed on a soil-covered slope where soil creep is active. The distinctive sandstone bed underlying the coal bed can serve as a helpful marker for geologists to better identify and locate the coal bed in such challenging geological conditions. Additionally, analyzing weathered sandstone fragments can provide valuable insights into the composition and potential presence of the coal bed beneath the soil-covered slope.
What are coal beds?
Coal beds are layers of hardened plant material that have been compressed over millions of years underground. These beds are rich in carbon and are one of the main sources of coal used for energy production. Coal beds are often found in sedimentary rock formations.
How is a coal bed formation possible in Antarctica?
Coal bed formation in Antarctica is possible through the accumulation and burial of plant material in swamps during ancient warm periods in the Earth's history. Over millions of years, the plant material undergoes compaction and chemical changes, forming peat and eventually coal. Antarctica has a history of relatively warm climates in the past, allowing for the formation of these coal beds that we see today.
Why is coal an unusual sedimentary rock?
First of all coal is not an unusual sedimentary rock, it is very abundant for the time being. The following is a tutorial from the supplied web site: Coal is clearly made up of lots of compressed bits of dead plants. But when we walk around in the world we usually see old bits of wood and leaves decaying and rotting away (that is, getting eaten by bacteria, insects, and all sorts of organisms involved in decay and recycling of organic matter). For thick layers of plant stuff to get fossilized as coal, something must be going on. Coal Formation starts with accumulation of organic matter (bits of dead plants) in a low oxygen setting such as a peat bog. The organic matter accumulates and forms a bed of peat. The peat bed gets buried by other sediments and under heat and pressure begins to transform to a low grade coal - a Lignite. More heat and pressure further metamorphose the lignite into Bituminous coal. Even more heat and pressure metamorphose the bituminous coal into a nice hard shiny Anthracite. Coal is usually classified into three grades: Lignite, brown coal; Bituminous coal, soft coal; and Anthracite, hard coal. Anthracite is dense, nice and hard, and shiny. The first step in the formation of coal is the accumulation of plant debris in low oxygen conditions, such as in this damp low spot on a moor. Peat exposed to heat and pressure from burial beneath other sediments becomes compressed and chemicaly changes into low grade coals such as this lignite, and under further heat and pressure is converted to higher grade coals. The pressure from overlying sediments that bury a peat bed will compact the coal. Peats transform to low grade lignites when they are compressed to about 20% of their original thickness. Lignite typicaly transforms to bituminous coal as it is compressed further and heated to between 100 and 200°C. This drives much of the water and other volitiles from the coal. Longer exposure to elevated temperature will further drive volatiles from the coal, and drive chemical reactions that produce anthracite. Anthracite coals are typicaly compressed to 5-10% of the orginal thickness of the peat bed, and contain less than 10% water and other volatiles.
How a coal seam might be used as a key bed?
A coal seam can be used as a key bed in stratigraphy by acting as a recognizable and widespread marker layer in the rock sequence. Key beds help correlate different rock layers in different locations based on the consistent presence of a specific marker bed, such as a coal seam, allowing geologists to establish the relative ages of rocks in various areas.
What is the layer of coal between rocks called?
The layer of coal between rocks is called a coal seam or coal bed. This layer forms over millions of years from compressed plant material.
Does coal oil same as fossil fuels?
I believe you mean coal bed gas or coal bed methane which is a fossil fuel.
What does CBM abbreviate?
coal bed methane
What geologist wants to locate a horizontal coal bed on a soil-covered slope where soil creep is active A distinctive sandstone bed underlies the coal bed On the basis of weathered sandstone fragm?
A geologist would typically use methods such as surface mapping, seismic testing, and borehole drilling to locate a horizontal coal bed on a soil-covered slope where soil creep is active. The distinctive sandstone bed underlying the coal bed can serve as a helpful marker for geologists to better identify and locate the coal bed in such challenging geological conditions. Additionally, analyzing weathered sandstone fragments can provide valuable insights into the composition and potential presence of the coal bed beneath the soil-covered slope.
What is fluidised coal used for?
Some modern ships use powdered coal as fuel. It is called "fluidised coal". Air is used to blow it alongpipes from the storage bunkers to thee boliers. Mary-anne darcy scientists and ship inspector
What are coal beds?
Coal beds are layers of hardened plant material that have been compressed over millions of years underground. These beds are rich in carbon and are one of the main sources of coal used for energy production. Coal beds are often found in sedimentary rock formations.
How to wash a bed canopy?
The best way to was a bed canopy is by hand. If you wash it in the washing machine it could tear or a seam could fall loose. A dry cleaner is a good option but can be spendy.
Where might one purchase iron bed frames online?
One might purchase iron bed frames online from the American Iron Beds website. The website has a variety of iron bed frames that can be used to fit any type of mattress.
What has the author Esa Kurkela written?
Esa Kurkela has written: 'Pressurized fluidized-bed gasification experiments with wood, peat and coal at VTT in 1991-1992' -- subject(s): Coal gasification, Fluidized-bed combustion
What is green coke CBM?
Green = environmentally friendly (non-polluting). Coke = coal that has been heated in the absence of air (contains more energy than the same volume of coal). CBM = coal-bed methane (naturally occurring gas found in coal beds). It is a greenhouse gas if allowed to escape into the atmosphere, but if captured it can be used as a non-polluting fuel - probably to turn the coal into coke.
Can a hammock be used as a bed?
yes, unless its raining outside. then you might get sick. and that's just no good.
