A scientific expedition to an abyssal ridge, situated to the north of the Hawaiian archipelago, yielded an unexpected discovery in 2022: an ancient, desiccated lakebed characterized by a formation strikingly reminiscent of a yellow brick road.
The research vessel Nautilus encountered this peculiar tableau while conducting a survey of the Liliʻuokalani ridge within the Papahānaumokuākea Marine National Monument (PMNM).
The PMNM stands as one of the planet’s most expansive marine protected zones, exceeding the combined area of all US national parks, yet only approximately 3 percent of its seabed has been meticulously mapped.
Scientists affiliated with the Ocean Exploration Trust are diligently expanding the boundaries of understanding within this largely uncharted wilderness, positioned more than 3,000 meters (approximately 9,843 feet) beneath the ocean’s surface. The remarkable aspect of these endeavors is their accessibility, allowing public observation of the ongoing exploration efforts.
A compilation of the expedition’s most compelling visual records, released on YouTube in April 2022, notably captures the precise moment when researchers, guiding an underwater vehicle, serendipitously encountered what seemed to be a path reminiscent of the fabled route from “The Wizard of Oz.”
“It appears to be the road to Atlantis,” a voice can be overheard stating through the radio communication.
“Or perhaps the yellow brick road?” another individual tentatively suggests.
“This is highly unusual,” a team member remarks.
“Seriously? This is extraordinary.”
Despite its sub-oceanic location, approximately a thousand meters down, the lakebed identified by the researchers atop the Nootka seamount presented a remarkably arid appearance.
This geological feature has been scientifically classified as a “fractured flow of hyaloclastite rock, a type of volcanic material formed during intense eruptions where numerous rock fragments are deposited on the seabed.”
During their communication, the team observed that the substrate bore a resemblance to a “baked crust” that appeared separable.
In specific, localized areas, the volcanic strata have fractured in a manner that strongly evokes the appearance of masonry.
“The distinctive orthogonal fractures are very likely a consequence of thermal stresses incurred during repeated eruptions at this baked margin,” is stated in the accompanying annotation for the YouTube video.
The vast majority of Earth’s surface is covered by profound oceanic depths, and a 2025 study illuminated the minuscule extent to which humanity has actually observed the floor of our planet’s predominant ecosystem.
Academics from the non-profit Ocean Discovery League, in collaboration with the Scripps Institution of Oceanography and Boston University, undertook the task of quantifying the portion of the seabed that has been imaged, utilizing publicly accessible data.
Over the entire 67-year history of deep-sea exploration record-keeping, our species has visually documented between a mere 0.0006 and 0.001 percent of the deep seafloor.
This upper boundary equates to approximately 3,823 square kilometers (1,476 square miles), a territory marginally larger than Rhode Island, the smallest US state, or roughly one-tenth the geographical size of Belgium.
Much like the deep seafloor itself, certain phenomena require direct observation to be fully comprehended and believed.
At first glance, the visual phenomenon of the yellow brick road effect observed at the Liliʻuokalani Ridge can be easily misinterpreted as a pathway to an extraordinary new realm. In a sense, this perception is not entirely inaccurate.
The appearance of this structured path signifies that our investigations are proceeding in a propitious direction, potentially leading to significant advancements in our understanding of Earth’s concealed geological processes.
“Our exploration of this previously unsurveyed region is instrumental in enabling researchers to gain a more profound insight into the life that exists on and within the rocky inclines of these profound, ancient seamounts,” stated the researchers from the Ocean Exploration Trust. (Source)
Further details regarding the 2022 E/V Nautilus expedition can be accessed via this link.
