Best Answer: Hi, Answer: estÃ¡ means is. Comments: There are two words for is in Spanish: estar and ser. EstÃ¡ is the third person singular, present indicative ...
The Largest division in the geological time scale is the Precambrian Era.It lasted from around 4.6 billion years ago to 570 million years ago.
Epochs are subdivisions of geologic periods. Era-A division of geologic time of several hundred million years in duration. An era is smaller than an eon and longer than a period. Geologic Time Scale-A categorization of geological events based on successively smaller time spans: eons, eras, periods, epochs, and ages.Hadean-The earliest eon in the history of the Earth from the first accretion of planetary material until the date of the oldest known rocks.eologic Time Scale-A categorization of geological events based on successively smaller time spans: eons, eras, periods, epochs, and ages. Hadean-The earliest eon in the history of the Earth from the first accretion of planetary material until the date of the oldest known rocks.