Complex sentence: South of Chacao Channel, Chile's coast is split by fjords, islands and channels; these glaciers created moraines at the edges of the Patagonian lakes, changing their outlets to the Pacific and shifting the continental divide.
Split into simpler sentences: South of Chacao Channel, Chile's coast is split by fjords, islands and channels. These glaciers created moraines at the edges of the Patagonian lakes, changing their outlets to the Pacific, and then shifting the continental divide.