Several types of massive ground ice, including ice wedges and intrasedimental ice, observable within the cliff wall of a retrogressive thaw slump located on the southern coast of Herschel Island. This exposure has a headwall that measures in excess of 22 m high and is over 1.3 km long. This cliff exposure has been increasing in size on a yearly basis since it was first measured in 1950 from air photographs.
<a href="//commons.wikimedia.org/w/index.php?title=User:Hallstwinpines&amp;action=edit&amp;redlink=1" class="new" title="User:Hallstwinpines (page does not exist)">Dave Fox</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>