Distinctive fractures in ancient lava flows on Mars suggest that water occasionally flooded portions of the planet's surface. The research piles onto previous findings that suggest the same. The ...

There has been a wave of articles over the last few weeks out on the geoblogosphere on columnar jointing in lavas – with many, many great images of columns seen aroundthe world. I thought I’d jump in ...

Columnar jointing is a common feature in many basaltic lava flows and intrusions around the world. Spectacular arrangements of columns have fascinated observers for centuries, and numerous hypotheses ...