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Page 1 of 2 Coal is formed by the way of a real complex and requires old time (tens of until hundreds of million years) under physics influence, chemical and situation of geology. To comprehend how coal formed from flora it is important to know where coal formed from flora it is important to know where coal formed and factors which will influence it is and form of coal seam.
There is 2 kinds of theory expressing place the forming of coal, that is :
A. The Insitu theory
This theory express that coal seam former material the forming of place of where the origin flora stays. Thereby after the plant is death, has not experienced transportation process, soon piled up by sediment layer and experiences process coalification. Coal type formed in this way has wide spreading and flattens, the quality is better because its(the ash content is small relative, Can be met at coal field Muara Enim (South Sumatera).
B. The Drift theory
This theory express that coal seam former material the forming of place differing from place of the origin flora stays. Thereby after the plant is death, transported by water media and accumulates a place, soon piled up by sediment layer and experiences process coalification. Coal type formed in this way has spreading is not wide but met some place, the quality is unfavourable because many containing pollutant material transported together during process transportation of from crop provenance to place of sedimentation. Can be met at delta coal field Mahakam Purba, Easth Kalimantan.
Factor Having An Effect On Coal is formed by the way of complex and requires old time (tens of until hundreds of million years) under physics influence, chemical and or situation of geology. Factor having an in with coal forming, that is :
a. Position Of Geo tectonic
Be a place which the existence is influenced tectonic styles of plate. This position influences local climate and precipitation hollow morphology of the coal and also degradation speed.
b. Morphology (Topography)
Morphology from hollow at the time of forming of peat of vital importance because determining spreading of marsh where the coal is formed.
c. Climate
Dampness plays a part is important in forming of coal and is floral growth controller factor and condition of appropriate. Depend on position of geography and influenced by position of geo tectonic.
d. Degradation
Influenced by tectonic styles. If degradation and precipitation of balance peat will be yielded sediment of thick coal.
e. Geology Age
Position of geology determines growing it evolution of assorted life of plant. In a period of its(the development is indirectly studies history of precipitation of organic coal and metamorphosis. More and more rock age stripper more and more in accumulation which happen, so that is formed gilt edged coal. But at coal having older geology age always there are risk experiences tectonic deformation forming fold structure or breaking at coal seam.
f. Plant
Flora is main element of coal former. Growth from flora is accumulated at one particular area and physiography zone with certain climate and topography, be determinant the forming of various type coal.
g. Decomposition
Decomposition of Flora is part of biochemical orthogonal transformation from organic is starting points for all alteration. In peat growth, rest of plant will experience change of either in physical and also chemicaly. After death plant, biochemical degradation process played more. The process of obsolence (decay) there will be by microbiology activity (anaerobe bacterium). This bacterium works in situation without oxygen breaks soft part from plant like celulose, protoplasm and extract. From process is upper happened change from wood to become lignite and bituminous coal. In situation of oxygen defiency happened bichemistry process causing its(the exit water (H2O) and some of element of carbon will lose in the form of carbon dioxide (CO2), carbon monoxide (CO) and methan (CH4).
Release effect of the element or compound number of relative of element of carbon will increase. Forming speed of peat depend on development speed of plant and the process of obsolence. when plant closed by water swiftly, hence will be protected by the process of obsolence, but happened disintegration process or decomposition by microbiology. when plant which has died too old resided in fresh air, hence forming speed of peat will decrease, so that only part of lag just firm complicating decomposition by microbiology.
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