The Cliffs at Gay Head. The layers of clay are very very old, with a thin layer of glacial deposits on top. So why are they so high above sea level today?

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Presentation transcript:

The Cliffs at Gay Head

The layers of clay are very very old, with a thin layer of glacial deposits on top. So why are they so high above sea level today? How is the Ice Age responsible for their visibility to us?

Some layers are 100 million year old deposits, from the Cretaceous.

Clay deposits are extremely soft, so the erosion is significant. Notice the color of the water.

Certain layers are rich with fossils. Based on the fossils, what can you say about how these layers formed millions of years ago?

A large fossil bone. But from what?

The City of Columbus (A cruise ship in it’s time.)

January 18, 1884

Actual photograph from the next day.

Devil’s Bridge (Glacial moraine and enormous erratics, just under the surface.)

Moshup The real reason for Devil’s Bridge. And Nomans Land. And the red color to the cliffs. And…

The Fresnel Lens