How are eras and periods of the geologic time scale named?

They are named for the places where geologists first described rocks or fossils from that time.

a

Explanation:

the peripheral nervous system or pns contains the nerves, which leave the brain and the spinal cord and travel to certain areas of the body. the peripheral nervous system's main job is to send information gathered by the body's sensory receptors to the cns as quickly as possible.