Glaciation. Artwork showing ice sheets advancing and retreating during an Ice Age. The left side shows a glacial period when ice is advancing. The sheet flows down a steep slope and cracks,forming crevasses. The right side shows glaciers retreating during an interglacial period,and illustrates the distinctive landscape features they create,including: glacial lakes and rivers; erratics (isolated boulders,centre); eroded bedrock mounds (far right); an esker (winding ridge,runs down from glacier); terminal moraines (semicircular ridges of rubble left by retreating glacier); and a cirque (semicircular hollow,upper right). Melting ice has raised the sea level | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Hks, Gary |
Taille de l’image : | 4745 px × 2976 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |