Complex sentence: It was mapped by the United States Geological Survey from surveys and U.S. Navy air photos, 1956--66, and was named by the Advisory Committee on Antarctic Names for Gerard R. Fierle, a meteorologist at Ellsworth Station during the winter of 1957.
Split into simpler sentences: It was mapped by the United States Geological Survey from surveys conducted by U.S. Navy air photos, 1956--66. It inherits its namesake from the Advisory Committee on Antarctic Names for Gerard R. Fierle, a meteorologist at Ellsworth Station during the winter of 1957.