Rock Layers in Just Hours?

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Forty years ago, Mount St. Helens in Washington state blew its top. This eruption started a series of geologic events. Hundreds of feet of sediment were laid down in just hours. And these layers were varied, just like the layers we see in the rock record.

Now, geologists were shocked that fast-flowing ash could produce these layers. They’d assumed a catastrophe would mix everything … and form layers with few variations.

Mount St. Helens reminds us that it didn’t take long ages to produce the rock layers. These layers were formed quickly during Noah’s global flood.

In reality, geologists don’t observe the long ages. That’s just an interpretation.

Dig Deeper

• Lasting Lessons from Mount St. Helens
• Mount St. Helens