LASCHAMPS EXCURSION: Mass extinctions 42,000 years ago
The Laschamp event was a geomagnetic excursion (a short reversal of the Earth’s magnetic field). It occurred 41,400 years ago, during the end of the Last Glacial Period. It is known from geomagnetic anomalies discovered in the 1960s in the Laschamps lava flows in Clermont-Ferrand, France. Cooper and his team created an exactly dated carbon 14 record from […]
WHY DOES EARTH HAVE PLATE TECTONICS AND CONTINENTS?
Our planet was very different some 250 million years ago from what it looks like today. Earth is the only planet that has plate tectonics because no other world has a surface divided into plates. Planet earth is constantly changing. Earth’s crust (lithosphere) consists of 15 to 20 moving tectonic plates. Even imagine these plates […]
