Geology of the Acasta Gneiss Complex: New evidence of the oldest rocks in the world Uehara, Yosuke ; Komiya, Tsuyoshi ; Iizuka, Tsuyoshi ; Ueno, Yuichiro ; Katayama, Ikuo Abstract Publication: Geochimica et Cosmochimica Acta Supplement Pub Date: September 2003 Bibcode: 2003GeCAS..67R.499U