Pont Julien
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The Pont Julien is a Roman stone arch bridge over the Calavon river, in the southeast of France, dating from 3 BC. The supporting columns are notable for openings to allow floodwater to pass through.
Pont Julien
View of the Pont Julien
View of the underside of one of the arches
The modern bridge crossing the Cavalon upriver of the bridge
Limestone
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Limestone is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of calci
Limestone outcrop in the Torcal de Antequera nature reserve of Málaga, Spain
This limestone deposit in the karst of Dinaric Alps near Sinj, Croatia, was formed in the Eocene.
Ooids from a beach on Joulter's Cay, The Bahamas
Ooids in limestone of the Carmel Formation (Middle Jurassic) of southwestern Utah.