'A 250-million-year, old grayish-white limestone layer of sea fossils is referred to as this canyon's "bathtub ring"'
the Grand Canyon
ROCK BAND: A 250-million-year, old grayish-white limestone layer of sea fossils is referred to as this canyons bathtub ring
A 250-million-year, old grayish-white limestone layer of sea fossils is referred to as this canyon's "bathtub ring"
A 250-million-year, old grayish-white limestone layer of sea fossils is referred to as this canyon's "bathtub ring"
ROCK BAND
the Grand Canyon
ROCK BAND