This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: composed of plant debris (and occasionally material from other creatues) that was deposited in abog or swamp that had little biological activity at its bottom. This led to preservation of the plant leaves, stems, pollen and other structures, although with continued burial these structures become much less distinct. Time and pressure combine with chemical changes to turn the plant material into coal. Fluctuating sea-levels during the Carboniferous contributed to the preservation of many coal environments....
View Full Document
- Fall '10
- Biology, Coal, Fern, Carboniferous, Mississippian, Pennsylvanian