Geologic Timeline Diagram. Geological survey geologic names committee 2010. Our geologic time scale was constructed to visually show the duration of each time unit.
With plants present on the land to provide a food source animals rapidly followed. It reflects ratified unit names and boundary estimates from the international commission on stratigraphy ogg 2009. 121 rows the geologic time scale gts is a system of chronological dating that classifies.
10 read about the changes to v.
Thicker units such as the proterozoic were longer in duration than thinner units such as the cenozoic. This chart displays how science sees the order of major probable events in the origin and evolution of life from the big bang to the present day. Gsa bulletin article walker et al. Map symbols are in parentheses.