Complex sentence: Ice penetrating radar results reported in this study indicated a sub-ice feature, interpreted as a volcano, above the seismic swarm and a mid-icecap (1400 m depth) ash layer of about 8,000 years old that was interpreted as probably origination at nearby Mount Waesche.
Split into simpler sentences: Ice penetrating radar results reported in this study indicated a sub-ice topographic feature, interpreted as a volcano, above the seismic swarm. The study also reported a mid-icecap (1400 m depth) ash layer about 8,000 years old that was interpreted as probably originating at nearby Mount Waesche.