Well, there is some question as to whether we should define a geologic era based on ourselves. It strikes some people as hubris. As I understand it the geologic eras were originally defined based on significant changes in the rock strata found around the world. The biggest changes would have been the fossils found in the rocks. I don't know that we are creating that big a change in the planet. And then there are some people who say that the idea of calling the current era the Anthropocene is more political than scientific.

Bill Gill
C is not the speed of light in a vacuum.
C is the universal speed limit.