Polystrate fossils—tree trunks in coal (Auracaria spp. king billy pines, celery top pines, in southern hemisphere coal). There are also polystrate tree trunks in the Yellowstone fossilized forests and Joggins, Nova Scotia and in many other places. Polystrate fossilized lycopod trunks occur in northern hemisphere coal, again indicating rapid burial / formation of the organic material that became coal.

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Science is based on observation, and the only reliable means of telling the age of anything is by the testimony of a reliable witness who observed the events. The Bible claims to be the communication of the only One who witnessed the events of Creation: the Creator himself. As such, the Bible is the only reliable means of knowing the age of the earth and the cosmos. In the end we believe that the Bible will stand vindicated and those who deny its testimony will be confounded.

Source: Creation.com