DeepTime for Geology
The geologic time scale at your fingertips
DeepTime for Geology brings the geologic time scale to your fingertips. It is kept updated to the latest time scale from the International Commission on Stratigraphy. Tap on any unit to see more information. View all the Golden Spikes (GSSPs) on a gorgeous geological map, courtesy of Macrostrat. Search by name or date, too, even for chronostratigraphic units that are regional or no longer used!