Issue Date
2000Keywords
Down-To-Earth SeriesCretaceous-Jurassic
Jurassic
Triassic
Mesozoic
Colorado Plateau
Holbrook
Navajo County
Apache County
Petrified Forest National Park
petrified wood
National Park
badlands
red beds
dinosaurs
Quaternary
Newspaper Rock
Rio Puerco
Whipple Point
Petrification
Blue Mesa
Sand dunes
desert pavement
rock-art
stream terraces
Chinle Formation
Bidahochi Formation
slump block
road log
gypsum
caliche