The Perito Moreno glacier , located 78 km from El Calafate , was named after the explorer Francisco Moreno , a pioneer who studied the region in the 19th century and played a major role in defending the territory of Argentina in the conflict surrounding the international border dispute with Chile . The Perito Moreno glacier , located 78 k from El Calafate , was named after the explorer Francisco Moreno , a pioneer who studied the region in the 19th century and played a major role in defending the territory of Argentina in the conflict surrounding the international border dispute with Chile .