Coconino Sandstone Dip Analysis

The video tutorial explores the Coconino Sandstone near the Navajo Bridge, focusing on its cross-bedded structure. It demonstrates how to measure the angle of dip using a Brunton compass and water to find the maximum dip. The tutorial explains the significance of dip measurements in understanding sand transport direction and compares these angles to those of desert sand dunes, concluding that the Coconino Sandstone likely formed in an underwater environment.

What is a characteristic feature of the Coconino Sandstone?

• It is a type of igneous rock.

• It has horizontal layers.

• It is cross-bedded with angled layers.

• It is found only in Colorado.

What tool is used to measure the angle of dip in the Coconino Sandstone?

• A protractor

• A Brunton compass

• A GPS device

• A ruler

How is the maximum angle of dip determined using water?

• By observing the direction the water flows down the slope

• By measuring the water's temperature

• By checking the water's color

• By calculating the water's speed

Why is the direction of the dip important?

• It indicates the age of the sandstone.

• It shows the direction of sand transport.

• It reveals the mineral composition.

• It determines the sandstone's color.

What does a dip angle of 17 degrees to the south suggest about the Coconino Sandstone?

• The sandstone is younger than other formations.

• The sand was transported from the south to the north.

• The sand was transported from the north to the south.

• The sandstone is older than other formations.

What is the significance of finding a flat surface for measuring dip?

• It shows the color of the sandstone.

• It ensures accurate measurement of the dip angle.

• It helps in determining the age of the rock.

• It reveals the mineral composition.

What is the average dip angle found in the Coconino Sandstone?

• 20 degrees

• 17 degrees

• 33 to 34 degrees

• 25 degrees

What is the angle of repose for desert sand dunes?

• 25 degrees

• 33 to 34 degrees

• 17 degrees

• 20 degrees

Why can't the Coconino Sandstone dips be considered as desert sand dunes?

• The sandstone is too young.

• The sandstone is too old.

• The dips are too shallow.

• The dips are too steep.

What conclusion is drawn about the Coconino Sandstone's environment of formation?

• It was formed in an underwater environment.

• It was formed in a desert environment.

• It was formed in a volcanic environment.

• It was formed in a forest environment.