What is another word for geological era?
Pronunciation: [d͡ʒˌɪəlˈɒd͡ʒɪkə͡l ˈi͡əɹə] (IPA) 
A geological era refers to a significant period in the history of the earth regarding geological events and changes that occurred during that time. Synonyms for this term include geological period, epoch, age, stage, and eon. Each of these synonyms refers to a specific range of time with distinct geologic features, such as rock formations or fossils. While geological period and epoch are often used interchangeably, age typically refers to a shorter period, and stage refers to a more specific subdivision within a geological period. Finally, eon is the broadest term, covering the entire history of the earth, with the most commonly recognized eons being the Hadean, Archean, Proterozoic, and Phanerozoic.
