Complex sentence: On the southern side of the river, opposite Gardens Point, are the Kangaroo Point Cliffs; made from Triassic aged volcanic rock of rhyolite composition called Brisbane tuff.
Split into simpler sentences: On the southern side of the river, opposite Gardens Point, are the Kangaroo Point Cliffs. The Kangaroo Point Cliffs are made from Triassic aged volcanic rock of rhyolite composition called Brisbane tuff.