The ice on Lake Peipus in Estonia sometimes forms this unusual, jagged surface. What’s it called?
A Hummock ice
B Ice shingles
C Dragon scales
Uneven temperatures and pressure under the sheet of ice on the lake surface can cause parts of the ice to jut up over the top, forming these shingle-like ridges known as hummock ice. No skating here, folks.
The correct answer is Hummock ice.