Marble is white or have swirls of colour with a crystallised structure. These are formed when either igneous or sedimentary rocks are changed. Heat and/or pressure will cause the elements in the ...

What FACTS ABOUT ROCKS do you know? They are abundant on earth, and yet little is known about them. These facts will increase your knowledge of the rocks.

In 1993 Schopf published a paper about some microfossils he had found in Early Archaean rocks, which he claimed were the oldest fossils to date. The microfossils were discovered in volcanic ...