Description

Marble is a metamorphic rock consisting of Limestone but composed mostly of Calcite. It is used extensively for sculpture, building materials and has many decorative uses. The pure white Marble is probably the most common form known, but the characteristic swirls and veins of colored Marble varieties are usually due to various mineral impurities such as Clay, Silt, Sand, Iron Oxides or Chert.

Fossils rocks are often formed in sedimentary rock. This type of rock forms from sediment, which is made up of pieces of rock, minerals, and organic matter. Over millions of years, sediment solidifies, becoming rock. Organisms trapped in sediment can eventually turn into fossils.
Sedimentary rock forms in layers. New layers form on top of old layers. So, fossils found in older, deeper layers are typically older than fossils found in newer, more shallow layers. Scientists can tell the relative ages of fossils based on which rock layers they are found in.