Complex sentence: The surge resulted in a complete destruction of the glacier, leaving behind an empty cirque, a phenomenon previously not observed anywhere else Large amount of subglacial water resulted in a surge so powerful, the glacier was practically ejected from its basin.
Split into simpler sentences: The surge resulted in complete destruction of the glacier, leaving behind an empty cirque, a phenomenon not previously observed anywhere else. The large amount of subglacial water resulted in a surge so powerful that the glacier was practically ejected from its basin.