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.
Geologic subdivision of an era based on the era's life-forms and geologic events Precambrian Time First major division of geologic time that began more than 4 billion years ago and makes up about 90% of Earth's history to date