What is the name of this periglacial landform largely spread in the Mackenzie Delta ?
Pingos are dome-shaped, isolated hills (also called hydrolaccoliths) , formed by ice cores that pushed the permafrost upwards. Collapsed pingos suggests that there was once permafrost in the area. They can be found in north Canada, Alaska, Greenland and Siberia.
reach: rather globalAlaskaCanadageology