Until we know the boundaries of life on Earth, it will be hard to decide whether extraterrestrial planets may have any living organisms," stated Sam Purkis, professor and department chair for the University of Miami's Department of Marine Geosciences.
These words ring true as researchers explore the mysterious NEOM Brine Pools, recently found hypersaline basins off Saudi Arabia's coast in the Gulf of Aqaba. These pools, lying almost 1,770 meters beneath the surface, are both geological marvels and time capsules, holding secrets of Earth's distant past and providing intriguing analogs for off-world environments.
The NEOM Brine Pools lie within the Aragonese Deep, a bathyal plain over 800 meters deeper than the Gulf's mean. Their creation is closely related to the tectonic complexity of the area, surrounded by strike-slip and normal faults that result in an actual pull-apart basin, a novelty in the Gulf of Aqaba. Seismic activity occurs regularly, with earthquakes frequently over magnitude 5.0, such as the 1995 Nuweiba earthquake. The largest pool, measuring 260 meters long and 70 meters wide, is accompanied by three smaller pools, all lying against the Saudi margin's steep slope.
The brine pools' distinctive chemistry and anoxia provide a pristine setting for the preservation of sedimentary records. Core samples taken from the NEOM pools demonstrate a continuous history of environmental phenomena going back at least 1,200 years. The layers contain evidence of underwater landslides, tsunamis, and flash floods, providing an unmatched record of regional climatic and tectonic disturbance. As Purkis described it, "Core samples from the recently discovered brine pools yield 'an unbroken record of past rainfall in the region, stretching back over 1,000 years, plus records of earthquakes and tsunamis.'" These layers are so well preserved because the brine prevents benthic megafauna, which elsewhere would agitate and mix up the sediments by bioturbation.
The NEOM Brine Pools, which were revealed in the waning minutes of a ten-hour ROV dive, are already a hot spot for multidisciplinary study. Their shore proximity, tectonic environment, and rare preservation of sedimentary and biological archives create a natural treasure trove that unites Earth's deep history with the quest for life outside it.
Read the full story at MSN