phanerozoic

In geology terms the difference between phanerozoic and proterozoic

is that phanerozoic is a geologic eon from about 570 million years ago to the present, comprising the Paleozoic, Mesozoic and Cenozoic eras while proterozoic is of, or relating to the geologic eon from 2,500 Ma to 541.0±1.0 Ma.

Phanerozoic is a hypernym of oxfordian.

In geology|lang=en terms the difference between phanerozoic and oxfordian

is that phanerozoic is (geology) a geologic eon from about 570 million years ago to the present, comprising the paleozoic, mesozoic and cenozoic eras while oxfordian is (geology) the age from 1635±10 ma to 1573±10 ma or the stage of rocks (chiefly coral-derived limestones) deposited during it.

As adjectives the difference between phanerozoic and oxfordian

is that phanerozoic is (geology) of, or relating to the phanerozoic eon while oxfordian is of or pertaining to oxford or its residents.

As proper nouns the difference between phanerozoic and oxfordian

is that phanerozoic is (geology) a geologic eon from about 570 million years ago to the present, comprising the paleozoic, mesozoic and cenozoic eras while oxfordian is (geology) the age from 1635±10 ma to 1573±10 ma or the stage of rocks (chiefly coral-derived limestones) deposited during it.

As a noun oxfordian is

a native or resident of oxford.