Columbia subject headings:
Geology, Stratigraphic--Carboniferous.
Geology--New Mexico--Otero County.
Geology--New Mexico--Sacramento Mountains.
Paleontology--Carboniferous.
Harvard subject headings:
Geology, Stratigraphic--Carboniferous
Geology--New Mexico--Otero County.
Geology--New Mexico--Sacramento Mountains.
Geology--Sacramento Mountains (N.M. and Tex.)
Paleontology--Carboniferous
Princeton subject headings: