The Coast Range Ophiolite Microbial Observatory (CROMO) is a multi-well network seated in serpentinizing ultramafic rocks near Lower Lake, California. CROMO was established in 2011 with funding from the NASA Astrobiology Institute and has been used to study biogeochemistry, microbial community dynamics, and physiology at high pH.
The Lost City Hydrothermal Field (LCHF) sits atop the Atlantis Massif near the Mid-Atlantic Ridge (30 N). The warm, alkaline fluid that vent from hydrothermal chimneys provide a fascinating analog to primitive environments involved in the origins and early evolution of life on Earth.
The Tablelands in the Bay of Islands Ophiolite complex of Gros Morne National Park (Newfoundland, Canada) is a portion of ~500-million-year old oceanic crust accreted to the continental margin. Despite it's age, gas-rich pH 12 fluids continue to seep from fractures within the ophiolite.