Processed to 3590 feet, lots of intrusions

Today we boxed rock core to a depth of 3590 ft, 122 ft deeper than yesterday.  It was another day of excellent drilling progress, although the processing was more difficult due to the more fractured nature of today's core.  Nevertheless, the rocks were extremely interesting as usual - we saw lots of intrusions.  In fact, we saw at least two intrusions >10 ft in thickness, each with thinner intrusive offshoot arms above and below each main intrusion.  There were a number of striking intrusive contacts, like this one below:

Here an intrusion has invaded pahoehoe lava at a high angle, ~60°.  Some of the core showed nearly vertical intrusions next to the more vesicular lava.  A number of the intrusions had chilled, glassy rinds and had captured small clasts of rock from the flow units they had invaded.  Stay tuned to the blog for updates to see if this intrusive swarm persists as we drill deeper.