The Canadian Shield is a vast beauty
, composed of rock thought to be over 4-billion years old. During the Pleistocene Epoch, 2.6 million to 11,700 years ago, large continental glaciers moved south and scraped the land’s surface, leaving behind rock striations, a thin layer of soil, and thousands of lake basins that now nestle amongst central Ontario’s forests. The waterways and small lakes in this capture are a result of melted ice sheets, while the reddish brown hues are areas of exposed bedrock.
Image captured by Theia, UrtheCast’s 5-meter resolution camera onboard the International Space Station.