epoch
Epoch
After an era, the next smallest division of time would be an epoch. An epoch is equal to around 10,000,000 years, where as an era is 100,000,000 years.
Period.
Eon is the broadest division on the geologic time scale, representing the longest time span. Eons are further divided into eras, which are then subdivided into periods, epochs, and ages.
The third largest division of geologic time is an era. The eras are further divided into periods, epochs, and ages.
Eon
Precambrian time
The shortest division in the geologic time scale is an Epoch. Epochs are subdivisions of a period and are typically tens of millions of years long.
The smallest unit of time on the geologic time scale is an epoch, which typically lasts millions of years. It is used to divide periods into smaller segments based on significant changes in Earth's history.
No, a geologic era is a longer unit of time than a geologic period. Geologic eras are divided into periods, which are further subdivided into epochs. The hierarchy from largest to smallest is era, period, epoch.
The smallest unit of geologic time is a "stage," which is typically defined by specific rock layers or fossils that mark distinct intervals of time within a geological period. Stages are further divided into ages, which correspond to even smaller intervals of time.
Geologic history is divided into four main eons: Hadean, Archean, Proterozoic, and Phanerozoic. These eons are further divided into eras, periods, and epochs based on significant events and changes in Earth's geology and life forms. Each division represents a distinct time period characterized by specific geologic or biological features.