Aptly named for its location behind a ball field in New York City's Central Park, Umpire Rock may offer a useful vantage point for calling balls and strikes. For scientists, however, it has served as a speed gun for calculating the trajectory and timing of an ancient glacier that once played an active role in global climate change. Schaefer refers to the Laurentide Ice Sheet that covered the island of Manhattan, along with the northern third of the U. It had spent more than 70, years affecting and reflecting the world's weather through periods of melting and growth.
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This information is vital for numerical models, and answers questions about how dynamic ice sheets are, and how responsive they are to changes in atmospheric and oceanic temperatures. Unfortunately, glacial sediments are typically difficult to date. Most methods rely on indirect methods of dating subglacial tills, such as dating organic remains above and below glacial sediments.
The Great Aletsch Glacier is a vision of primaeval beauty. High up on the Moosfluh , Bettmerhorn and Eggishorn viewpoints is the best place to admire the scale and unique magic of the Great Aletsch Glacier. This huge river of ice that stretches over 23 km from its formation in the Jungfrau region at m down to the Massa Gorge, around m below, fascinates and inspires every visitor. Tip: A great way to experience the immense sea of ice is on a guided glacier walk. Detailed information about the glacier and the most liberating nature experience of the Alps can also be found at Glacierworld Bettmerhorn multimedia exhibition and at the Pro Natura Center Aletsch.