Issue Date
1986Keywords
Arizona Geological Survey BulletinsArizona
radiometric age determination
topography
map
Geology
field studies
Proterozoic
Mesozoic
Paleozoic
Tertiary
Quaternary
Transition Zone
Colorado Plateau
La Paz County
Coconino County
Navajo County
Santa Cruz County
Yuma County
Apache County
Yavapai County
Graham County
Basin and Range Province
Gila County
Cochise County
Pinal County
Pima County
Maricopa County
stratigraphy
fission-track dates
Rb-Sr dates
Ar-Ar- dates
K-Ar Dates
geochronology