Artykuly z roznych dziedzin

Visit to „Mars” – Cheltenham Badlands, Ontario – Canada
This magnificent landscape is believed to form with overgrazing the soft layer of the shale by farming that exposed this red iron rich material. The farming has stopped in 1931, however the erosion continues increasing this remarkable site in size.
The hills and gullies are composed of clay containing mostly red iron oxide and green iron oxide visible as greenish-gray bands throughout the land.