the day i gave birth the year 2089
We are in the Rock and Roll era.
We have no idea what you mean "left out of the rock and roll era."
clothes
They ushered in grunge rock era
1950s.
Elvis
Sedimentary rock was, and is, being formed in all geologic eras.
Rock maybee?
yes
Hardcore
1950's.
About the early to mid 50's =]