Complex sentence: Mapped by the British Antarctic Expedition under Robert Falcon Scott, 1910-13, the lake was visited by Professor T.L. Péwé during USN Operation Deep Freeze, 1957-58, who named it for Dr. Fritiof M. Fryxell, glacial geologist of Augustana College, Illinois.
Split into simpler sentences: Mapped by the British Antarctic Expedition under Robert Falcon Scott, 1910-13. The lake was visited by Professor T.L. Péwé during USN Operation Deep Freeze, 1957-58, who named it for Dr. Fritiof M. Fryxell, glacial geologist of Augustana College, Illinois.