Answer by John MackayWhat is polystrate? The word itself is easy: poly as in many, strate, as in layers or strata. Therefore, polystrate means “many layers” and usually refers to fossils that protrude though one or more layers. Here is a classic example of such a tree in Kentucky coal fields near town of Hazard […]
Answer by Bob Powell One of the great debates in understanding the nature of earth’s geology is whether the huge volumes of sedimentary rocks covering some 70 percent of the planet’s surface formed fast or slow. This debate has often been portrayed as catastrophist vs uniformitarian, where the uniformitarian theorizers (based on Charles Lyell) are […]