Logged to 988.6 feet, a piece of transitional core

Today we were able to log core boxes to a depth of 988.6 ft, 57.1 deeper than yesterday.  We encountered another transitional flow, and here is an illustrative example of how sudden the transition between pahoehoe and ʻaʻa can be in these types of flows:

The piece of core I'm holding in my hand shows a sharp transition from spongy pahoehoe to typical ʻaʻa with no associated process at all.  The transitional flow we logged today routinely switched back and forth between flow types without producing any contacts, while of course maintaining the same mineralogy throughout.

Once we finish logging this unit, the rocks only get trickier just below.  Stay tuned to see what we decipher tomorrow.