A Geoscience Digital Image Library

TitleBrown marble, from near Knoxville, Tennessee
DescriptionMarbles (metamorphosed limestones or dolostones) are typically white, but just about any color is possible. Microscope examination of this sample reveals that it was a biogenic limestone prior to metamorphism. The brown color, at least in part, appears due to organic matter that survived metamorphism. Some hematite is also present and adds some red to the color. This sample is 8 cm wide.
LocationUSA ▹ Tennessee
PhotographerNessa Eull. 2001-05-22.
CollectionWard’s University Rock Collection #175.
Key wordsmarble, Tennessee
Tech details786 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens.
GeoDIL number508