What Caused the New Madrid Fault Zone?

By Alice Nichols

The New Madrid Fault Zone is a seismic area that lies in the central United States. It covers parts of seven states, including Missouri, Arkansas, Tennessee, Kentucky, Illinois, Mississippi, and Indiana.

The fault zone produces earthquakes that are some of the most powerful in the country. But what caused this seismic activity? Let’s take a closer look.

What is the New Madrid Fault Zone?

The New Madrid Fault Zone is a complex network of faults that extends approximately 150 miles along the Mississippi River Valley. It was named after the town of New Madrid in Missouri, which was one of the areas hit hardest by a series of earthquakes that occurred in 1811 and 1812.

What Causes Earthquakes?

To understand what caused the New Madrid Fault Zone to form and produce earthquakes, we need to understand what causes earthquakes in general. Earthquakes occur when there is movement along a fault line.

A fault line is where two tectonic plates meet. These plates are constantly moving due to pressure from the earth’s mantle.

When two plates meet and begin to slide past each other or collide, they can create stress on the surrounding rock. This stress builds up until it becomes too much for the rock to handle and it fractures along the fault line.

The energy released by this fracture is what causes an earthquake.

What Caused the New Madrid Fault Zone?

The formation of the New Madrid Fault Zone began about 500 million years ago during a time when North America was part of a supercontinent called Pangaea. As Pangaea began to break apart around 200 million years ago, North America began to move away from Africa and South America.

This movement caused stress on the rocks beneath North America which led to fractures along what would later become known as the New Madrid Fault Zone.

Over time, these fractures became more pronounced as the region continued to experience tectonic activity. As the fractures grew larger, they created a network of faults that make up the New Madrid Fault Zone today.

Conclusion

The New Madrid Fault Zone is a complex network of faults that has been formed over millions of years due to tectonic activity. While we can’t predict when the next earthquake will occur, understanding what causes earthquakes and how they form can help us prepare for them.

If you live in an area prone to earthquakes, it’s important to have an emergency plan in place. This includes having a supply of food, water, and other essentials on hand in case of an earthquake or other natural disaster. Stay safe!