Twig: M3 D2 L3 - Reading the ROcks

What is the name of the rock layer mentioned in the text that tells its story with sand and footprints?

• Navajo Sandstone

• Coconino Sandstone

• Redwall Limestone

• Kaibab Limestone

What natural force is mentioned as having shaped the sand dunes in the Coconino Sandstone?

• Water currents

• Earthquakes

• Wind

• Volcanoes

The Kaibab Limestone is approximately (a)   old.

• 100 million years
• 270 million years
• 500 million years
• 50 million years

What evidence do geologists find in the Kaibab Limestone?

• Dinosaur bones

• Fossils of sea creatures

• Volcanic ash

• Meteor fragments

What grows on the Kaibab Limestone now?

• Trees

• Plants

• Mushrooms

• Cacti

What does the presence of fossils in the Kaibab Limestone indicate?

• It was once a forest

• It was once underwater

• It was once a desert

• It was once a mountain