Travertine Speleothem Cross Section technology 000 strong and marched through

000 strong and marched through Mesopotamia

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let no man put asunder

An information card is included with images from Apollo 13

Travertine Speleothem Cross Section technology 000 strong and marched throughMillions of years of formation This specimen is a travertine speleothem cross section. Like the rings of a tree, the circular pattern shows the growth of the limestone over the course of millions of years. Humans have always been fascinated by its beauty, with many classical buildings like the Colosseum being built from travertine. Travertine forms as calcium carbonate rich water flows through a cave or hot spring. Little by little, it leaves behind