a, o, e, g, l, c, r, i are letters that make 'geological era'
ER, log, logic, ERA, IC, Gi, logical, ic, geological, geologic, GI, RA, AL, CA, Ra, Al, Ca, Er, Ge, era are words within 'geological era'
1 possible definitions for 'geological era'
Under this definition, geological era is a noun and has the following properties:
era has the same meaning as geological era
'geological era' can be a type of geological time, geologic time.
Cenozoic era, Age of Mammals, Mesozoic, Mesozoic era, Age of Reptiles, Paleozoic era, Cenozoic, Paleozoic. are instances of 'geological era'
period, geological period are parts of 'geological era'.