Question

WHICH of the following is an era? *

Fixed period of time
every 100 years
every thousand years
every 10 years
none of the above


ASAP

Answer 1

• Answer:
• An era in geology is a time of several hundred million years. It describes a long series of rock strata which geologists decide should be given a name. An example is the Mesozoic era, when dinosaurs lived on the Earth. An era is made up of periods, and several eras make up an eon. :)
• So the correct answer should be "none of the above"