Which era lasted the longest? Answer and Explanation: The Precambrian era lasted the longest. This era lasted from the formation of the earth about 4.5 billion years ago to the start of the Paleozoic era 542 million years ago with the Cambrian explosion.
What is the first and longest era? Precambrian Time: 4.6 billion to 542 Million Years Ago
Precambrian Time started at the beginning of the Earth 4.6 billion years ago. For billions of years, there was no life on the planet.
What are the eras longest to shortest? From longest to shortest, the segments of time are eon, era, period, and epoch. 5.
Is era the longest time? era, a very long span of geologic time; in formal usage, the second longest portions of geological time (eons are the longest).