High moral Robinson and in this what is a video we’re going to investigate a very unique formation I. Glacier is defined as a slowly moving river ice but not all masses a vice are glaciers to qualify to be a glacier ice must be at least 607 square mile in size and over 164 feet thick. Are the largest glacier as eastern an article that Lambert glacier which is about 60 miles wide over 250 miles long and over aid thousand feet thick. Glaciers form in places where snow accumulates over a long period of time as the snow gets deeper the resulting weight and pressure turns the bottom layers of snow into ice. This high pressure combined with the force of gravity causes the glacier to move other most glaciers move very slowly some move as fast as one hundred feet per day . Glaciers exists on every continent and play a major role in shaping the face of the earth through corrosion water from the bottom layer the glacier seeps into cracks in the earth where freezes and expands listening rocks and boulders from the earth’s surface. These rocks are dragged along the glaciers path. The earth beneath a glacier become smooth a smaller rocks and debris become frozen in the glaciers lower layers acting like sandpaper . Letter cards lakes in valleys format for Dan’s and create riverbed the water announce from a glacier surface is the largest source of fresh water on the planet . Although glacier malt also called retrieve as a normal part of the water cycle. Sinus noted that’s glaciers are retreating faster and further than ever . And pointed this as evidence a global warming