Complex sentence: As a result of the serac fall, the climb in the Bottleneck became steeper and more technical and chunks of ice lay scattered around the route, and the mountaineers above were stranded in the so-called death zone above 8000 meters.
Split into simpler sentences: As a result of the serac fall, the climb in the Bottleneck became steeper and more technical. Chunks of ice lay scattered around the route, and the mountaineers above were stranded in the so-called death zone above 8000 meters.