Category Archives: Palaeozoic

Oxygenation of Earth’s atmosphere may not have required a trigger event after all

Posted on December 14, 2019 by Chris Rowan

In Earth history, there have been 3 abrupt jumps in atmospheric oxygen. A evolutionary or tectonic trigger is usually invoked, but a new study just published in Science suggests all you need is gradual oxidation of earth’s surface plus feedbacks … Continue reading →

Categories: Archean, climate science, deep time, geochemistry, geology, Palaeozoic, past worlds, Proterozoic, society

Scenic Saturday: Crossbeds on the Edge

Posted on July 26, 2014 by Chris Rowan

Some of the famous features of the Peak District are not really peaks at all – but there is nothing more scenic than a wander along one of the ‘Edges’. These sheer cliffs, scattered along the eastern and western edges … Continue reading →

Categories: geology, geomorphology, Palaeozoic, photos

Scenic Saturday: a pilgrimage back to the grand granitic tors of Dartmoor

Posted on June 9, 2012 by Chris Rowan

The high and rugged scenery of Dartmoor is as wild and untamed a landscape as you’re likely to find in the United Kingdom, and would seem to have more in common with the Scottish Highlands than the prim and proper … Continue reading →

Categories: geomorphology, outcrops, Palaeozoic, photos, rocks & minerals