stratified rock

Geologists use radiometric dating of other elements with much longer half lives than Carbon-14 to estimate the ages of these stratified rock layers.

From there, the route hugged the shoreline, and I couldn’t help but imagine Mr. Muir as a boy, skipping over the acres of stratified rock to, as he wrote, “gaze and wonder at the shells and seaweeds, eels and crabs in the pools.”

At the upper edge of the hill was an outcrop of stratified rock.

While it may be reasonably assumed that, in general, a great thickness of stratified rock must mark the passage of a long period of time, it cannot safely be affirmed that a much less thickness elsewhere must represent a correspondingly diminished period.

Occasionally, we’d be startled by something unexpected — the viridian and turquoise of Lake Musters, framed by ocher reeds; the stratified rock formations of Bosque Petrificado Sarmiento, which presided over an abandoned realm of petrified wood chips deposited by a river that had carved out the valley 65 million years ago.