By Mike Cheadle
Sentry dive 420 returned to the surface about 10:00am & produced another amazing map. We can now trace semi continuous outcrop for 2 vertical kms. We started our first Jason dive just before lunch. The dive started at ~ 4.3km on outcrop, which we think is gabbro, & the outcrop has been almost continuous since we started. We’re trying to sample approx. every 20m up the slope. Faults are present, but we’ve also seen clear examples of igneous layering. We’ve also seen numerous sponges, a sea star, crab & a single shrimp who visited several times. We’ll be using an elevator early in the morning- so our first samples will be on deck soon & we hope to keep the dive going for a few days.