Complex sentence: There are two small subsidiary craters adjacent to the main cone and some lava flows resulting from the eruption; examination of the lava nearby shows quench features, typical of rapid cooling brought about by contact with seawater.
Split into simpler sentences: There are two small subsidiary craters adjacent to the main cone and some lava flows resulting from the eruption. Lava nearby shows quench features, typical of rapid cooling brought about by contact with seawater.