An important condition for the formation of coal is ________
answer
incomplete decomposition of organic matter due to a lack of oxygen
question
Detrital sedimentary rocks are classified primarily on the basis of ________.
answer
particle size
question
A major difference between coal and oil/gas is ________.
answer
coal forms in swamps and oil/gas form in marine environments
question
Which of the following is not a dark silicate mineral?
answer
Quartz
question
Intrusive rocks ________.
answer
none of the above
question
Silts and clays are commonly deposited in lakes, lagoons, swamps and marine environments because ________.
answer
those settings have relatively still water
question
The agents of metamorphism are ________.
answer
heat, pressure, and chemical fluids
question
If magma or lava cools quickly, the resulting igneous rock will have ________.
answer
very small crystals
question
Which of the following lists the rocks in the order of increasing grain size and increasing grade of metamorphism?
answer
slate, phyllite, schist
question
Describe the process of coal formation. Be specific and detailed.
answer
This took place in swampy areas from what I understand. This would happen over and over again, eventually, peat, which is sediment formed and since it was preserved it eventually became coal.
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