Emergent day.

8°C, few showers, sun, no cycling.
Recovery: a week of undefined illness has sapped most of my energy. Now it’s lifting I can’t feel the cold, and yes I know the air has dipped below 5C. So, I spent the day recovering.
I became quite geeky later in the afternoon.
Geekiness is fuelled by a feeling. It’s a feeling with deep roots, all the way back to childhood.
With a cold like mine, any activities today had to beundemanding, so I spent time looking round Google Earth. In a few places, there are circular mountain ranges that are just too perfect a circle. With a little research, it turns out that many are impact craters. Some are as young as 3.5 million years, which doesn’t sound that old, relatively, geologically. The earth is peppered with them, though some are only detected by their gravity anomalies  One contributer has uploaded a .kml file that shows loads more. I was, by now, hooked.
And, this is where it gets geeky, I decided to see how they look in the flight simulator FSX. Some are quite clear, often a near circular lake, or an obvious crater. One, in far eastern Siberia, is not actually an impact crater but an eroded intrusive pipe (Kondyor Massif). Now it’s one of Russia’s biggest platinum mines.
kondyor_pxlr