s, a, o, b, e, f, n, p, c, r, i, u are letters that make 'Upper Carboniferous'
ER, pe, ONI, Rous, ar, Ro, upper, up, on, carboniferous, car, carbon, US, AR, CA, arb, Ar, Ca, Er, Fe, Ni, Rb, Carboniferous are words within 'Upper Carboniferous'
1 possible definitions for 'Upper Carboniferous'
Under this definition, upper carboniferous is a noun and has the following properties:
Pennsylvanian, Pennsylvanian period, Upper Carboniferous period have the same meaning as 'Upper Carboniferous'
'Upper Carboniferous' can be considered an instance of period, geological period.
'Upper Carboniferous' can be a part of Carboniferous, Carboniferous period.