Scenic2 (IMAGE) University of South Florida Caption Pressure ridges form near McMurdo Station in Antarctica where sea ice and the Ross Ice Shelf collide. This site is home to beautiful ice forms and cracks that provide Weddell Seals areas to jump onto the ice shelf and give birth to their pups. Credit Ryan Venturelli Usage Restrictions NA License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.