The Johnson Geo Centre is a geological interpretation centre built  into the 550 million year old exposed rock of Signal Hill. Here, you  can see the features and characteristics of Signal Hill’s geology and  the province of Newfoundland and Labrador. No other easily reached place on the planet has a geological record that so fully  reveals the history of the Earth, going back almost to its birth over  4.5 billion years ago.The rocks of Signal Hill are 550 million year old — 100 million years older than the eastern Appalachian Mountains, and  over 400 million years older than the western Rocky Mountains!