Urban fossils of Ottawa

City Hall

Tyndall Stone
: outer façade
Rock: limestone
Age: Ordovician
Fossils: cephalopods, corals, gastropods and ichnofossils

Information and photographs: Quentin Gall. Dept. of Earth Sciences, University of Ottawa
More information: A Walking Guide - Ottawa’s Building and Monument Stones
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Surface of Tyndall Stone on the façade, showing dolomitized burrows (Thalassinoides), orthocone cephalopods and a gastropod (Hormotoma sp.)

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Tabulate coral