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A K-Ar age of 4.21 ± 0.35 billion years represents a mixture of detrital and authigenic components and confirms the expected antiquity of rocks comprising the crater rim.

Meet Alvin, the Deep-Sea Submersible Seasickness, and Mutualistic Bacterial Mats Creepy Crawlies and Lady Gaga Heads The plan for Alvin Dive 4636 was ambitious: deploy four experiments and collect eight authigenic carbonates, four Niskin bottles of water, 24 tube cores of seep sediment, one scoop of clams, and two “slurps” of microbial mat.