Polished Stalagmite Showing Growth Layers (IMAGE)

University of Minnesota

Polished Stalagmite Showing Growth Layers

Caption

Scanned image of a polished stalagmite showing growth layers. As stalagmites grow, they incorporate trace amounts of naturally occurring magnetic minerals, primarily from soils overlying the cave. The concentration of these magnetic minerals is enhanced with increasing rainfall and can be used as a record of past precipitation history. The ruler is 15 cm long.

Credit

Photo credit: Becky Strauss (University of Minnesota Ph.D. 2016)

Usage Restrictions

With credit to photographer

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