It’s weirdly calm now. The submersibles left on July 3rd (and along with them, the whole crew from Nuytco). Some new folks arrived last night, ushering in “Science Week” here. The focus has shifted from subs to SCUBA diving and water sampling.

I miss the DeepWorkers. They were the heart and soul of this place for the first two weeks, and everyone’s energy was completely dedicated to them. It almost feels like a completely different project. And now that it’s over: I realize that I haven’t actually divulged much about what was going on, so here’s a quick rundown:

Our days started around 7am—the sub pilots finishing the details of their upcoming dives, the Nuytco guys testing the hydraulics on the subs, me frantically labeling tapes, etc. There were four dives each day—two in the morning, two in the afternoon. The subs had to be lowered into the water by hand, using pulleys and chains. Thank heavens for Jeff from Nuytco, proud owner of a pair of Incredible Hulk arms. The subs would stay underwater for around two hours, flying contours of the lake and getting high-definition video of different microbialite morphologies. Watching the video footage is like a trip back ten million years ago.

Some of the microbialites are pretty small and ugly. But others have the most incredible, intricate and varied shapes. We’ve adopted a vegetable system of nomenclature: some are artichoke-shaped, some cauliflower-shaped, etc. Others look like collections of chimneys, and a few are perfectly cone-shaped. The astronaut found microbialites that look almost like fire coral. Here’s a video: