Utrecht University tool maps address latitude over 320 million years

A modern home address is viewed as a fixed point on a map. The street signs, the plot lines, and the surrounding geography are generally treated as static in the short term. However, over a geological timescale, that same patch of dirt has shifted across the globe, moving thousands of miles to arrive at its current coordinates.

Researchers at Utrecht University have launched Paleolatitude.org, a tool that allows users to retrace this journey. By plugging in any location on Earth, the site maps how that specific point has drifted north or south over the last 320 million years, tracing its path back to the era of the supercontinent Pangaea.

Mapping the drift of a modern address

The tool operates as a digital record of latitudinal change. When a user enters a location, the site generates a chart showing latitude on the Y axis and age in millions of years (Ma) on the X axis. A blue line traces the movement, allowing users to see exactly when their current location shifted toward the poles or drifted toward the equator.

For example, the tool can visualize the movement of Washington, D.C., showing how the city’s landmass migrated across the globe over 320 million years. While the tool does not provide an animated view of the migration or reveal changes in longitude—the east-to-west movement—it provides a clear record of the vertical shift across the planet’s surface.

The underlying data comes from the Utrecht Paleogeography Model. According to Gizmodo, the development of this model was a long-term effort.

The difference between a warm world and a warm location

The project began as a solution to a specific geographical puzzle. Geoscientists studying fossils in Winterswijk, Netherlands, discovered remains of flora and fauna that appeared to belong in the modern-day Persian Gulf. This discovery raised a fundamental question: was the entire planet experiencing a global heatwave, or had the land itself moved?

The researchers noted that Latitude determines the angle of the sun’s rays and thus also the local climate, suggesting that location is often as important as global temperature. By using the model, they confirmed that 245 million years ago, the Netherlands had a desert climate because it was physically located at the same tropical latitude as the modern-day Persian Gulf.

This distinction allows scientists to separate global climate shifts—where the entire planet warms or cools—from tectonic movements, where a landmass simply slides into a different climate zone. By using these reconstructions, researchers can analyze the specific environmental changes that occurred in a given region over millions of years.

Unfolding the Earth’s hidden history

Reconstructing these movements requires a complex two-step process. First, scientists unfold mountain ranges to determine how tectonic plates moved relative to one another. While the specific software algorithms used for this unfolding are not detailed in available reporting, the process allows researchers to identify the fingerprints of lost continents.

Some of these landmasses, such as Argoland, the Tethys Himalayas, and Greater Adria, no longer exist on the surface. Instead, they are relics of plates that once existed at the Earth’s surface but have gone into the mantle, according to van Hinsbergen. These lost continents left geological evidence in the folded rocks of Indonesia and the Mediterranean.

The second step involves analyzing magnetic minerals trapped in ancient rocks. Because the angle of the Earth’s magnetic field changes between the poles and the equator, these minerals function as a prehistoric GPS. This allows geoscientists to pinpoint a rock’s original latitude and chart its trajectory over eons.

“This means that, for the first time, a truly global model is now available that allows you to link those rocks to their original plates, which have since disappeared into the Earth’s mantle. The global journey of those rocks can now also be traced,” Douwe van Hinsbergen, professor of global tectonics and paleogeography at Utrecht University

Tracing biodiversity through deep time

Beyond the interest of homeowners and geography enthusiasts, the tool provides a resource for paleontologists. By identifying the exact historical latitude of fossil-rich rocks, researchers can track how biodiversity shifted as landmasses moved through different climate zones.

This data helps scientists analyze how various species responded to rapid temperature changes and ancient mass extinctions. By linking a fossil to its original plate and latitude, researchers can better understand the environmental conditions that existed during the life of the organism and the factors that contributed to its extinction.

The reconstruction effort was particularly focused on regions that were previously difficult to map. A decade ago, reconstructions existed for major plates, but they often ignored intensely deformed areas like the Mediterranean, the Caribbean, and the Himalayas. Van Hinsbergen stated that he and his colleagues have now reconstructed those specific regions in enormous detail.

The current map of the world is merely a snapshot in a much longer sequence of motion. The ground beneath any given address is not a destination, but a stop on a 320-million-year journey that continues as the plates beneath the crust continue to shift.