Category Archives: impacts

Volcanoes and mass extinctions – tracking a killer

Look in a bookshop and see how many shelves are taken up with murder mysteries. There’s little that is as compelling as the idea of a dead body on the ground and a search to find the culprit. I’m going … Continue reading

Categories: impacts, sediments

Scars, acne and others: circles on the ground

Looking is never just looking. When we gazeĀ at something, we are not passive recipients of an image, instead our brain is constantly looking for patterns. If you are drifting over the earth, whether as an astronaut or via Google MapsĀ then … Continue reading

Categories: Great Geology in Google earth, impacts

A world without subduction

The greatest achievement of the generation of Earth Scientists now retiring is the concept of plate tectonics. The insight that the earth’s surface is made up of rigid plates that move has shed light on all aspects of Earth Science, … Continue reading

Categories: eclogites, impacts, metamorphism, subduction, tectonics

Radioactivity and the earth (and moon?)

We tend to think of radioactivity as an artificial thing; some argue that the first nuclear explosions in 1945 should mark the start of a new human-dominated geological epoch called the Anthropocene. These man-made explosions have left distinctive radioactive traces … Continue reading

Categories: geochemistry, impacts