2100 years ago is today in epoch term times, however you could be right times are a changing, the Holocene is barely 11,500 years old but already we could be entering a new geological epoch maybe 7,000,000 years too early, but maybe not, evidence of massive changes on average occur every 3,000,000 years so that would be considered normal until now.
The biggest time frame are eons then eras after that periods followed by epochs and ages.
This is the new Meghalayan age coming from rocks denoting time through chemical composition linked to the atmosphere particularly in the past 600,000 years the atmosphere has recorded it's content of Oxygen and Carbon in rocks.
The present Holocene is divided up into 3 ages the Greenlandian the Northgrippian and Meghalayn.
But this is so different since 1750 that we could have departed the Meghalayn making the Holocene the shortest epoch on record.
This new dimension is being referred to as the Antropocene which could be an age or an epoch, depending on how long it lasts, but nevertheless it's the direct result of industrialization mainly.
The Holocene is the first time agriculture was possible on a scale compatible with human sedimentation that is dependant on cultivating and grazing domestic animals rather than nomadic hunter gatherer life style.
God said I was right don't forget.
2100 years ago is today in epoch term times, howev... (