A field photograph showing travertine crystal growth ripples on the vertical side wall of the Anio Novus aqueduct at Empiglione Bridge. (IMAGE)

University of Illinois at Urbana-Champaign, News Bureau

A field photograph showing travertine crystal growth ripples on the vertical side wall of the Anio Novus aqueduct at Empiglione Bridge.

Caption

A field photograph showing travertine crystal growth ripples on the vertical side wall of the Anio Novus aqueduct at Empiglione Bridge.

Credit

Photo courtesy Bruce Fouke

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