The geological timescale figure contains the various supereons, eons, era, and periods of the Earth simplified from the detailed geological timescale figure from the International Commission on Stratigraphy (2009).

Information of the age of rocks from Guyana in Millions of Years (My) are indicated in red (text and arrow). Oldest ages obtained in zircon of Australia, Canada and Brazil and of the Moon also included in black (text and arrow) for comparison with Guyana. Ages of animal species and man are also shown.