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.
Stratigraphy Unlike most other geological periods which have a three-part division into early, middle, and late, the Permian Period was conventionally divided into early and late only. The more recent arrangement has a three-fold division.