Complex sentence: Big Dan is situated in the Temagami greenstone belt, a 2,736 million year old sequence of metamorphosed igneous and sedimentary rocks that forms part of the much larger Superior craton.
Split into simpler sentences: Big Dan is situated in the Temagami greenstone belt. This is a 2,736 million year old sequence of metamorphosed igneous and sedimentary rocks that forms part of the much larger Superior craton.