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Sight of the fjord Formation The Virtual Museum of Canada
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Musée du Fjord

Ordovicien Ocean
Transverse section: 450 million years

Graphic of the ordovicien ocean

Towards the end of the Cambrian era (505 million years), the Ordovicien Ocean located southeast of the Canadian Shield began to close up. This contraction caused the sinking of the shield that was consequently covered by a shallow warm sea in which limestone formed. Several hundred years later (about 250 million years), the various continental fragments re-united to form a new vast continent called "pangea".

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  Anorthosite (black granit)
  Limestone
 

Water

 

Rocky basal coplex

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