Question

describe how coal is formed from dead vegetation. what is this process called?

Answer 1

Coal formed millions of years ago when the earth was covered with huge swampy forests where plants - giant ferns, reeds and mosses - grew.  As the plants grew, some died and fell into the swamp waters.  New plants grew up to take their places and when these died still more grew.  In time, there was thick layer of dead plants rotting in the swamp.  The surface of the earth changed and water and dirt washed in, stopping to decaying process.  More plants grew up, but they too died and fell, forming separate layers.  After millions of years many layers had formed, one on top of the other.  The weight of the top layers and the water and dirt packed down the lower layers of plant matter.  Heat and pressure produced chemical and physical changes in the plant layers which forced out oxygen and left rich carbon deposits. In time, material that had been plants became coal.

Answer 2

coal is formed by successive compression of the earth with layers of soil. when the dead plants are remains of animals is compressed in the soil which takes much time.. releases every volatile compounds in it... the leftover Mars is called call which is only composed of carbon nitrogen and hydrogen sulphide and bit traces of sulphur.

attack at least 50 million years to form bituminous coal for anthracite it would take 200 millionaires