[tanatocenose]

Only related tangentially: Los Angeles’ famous beaches, some 31 miles worth, are all man-made.

“In 1947, for example, nearly 14 million cubic yards of sand were removed to make way for El Segundo's Hyperion power plant. They were deposited onto Santa Monica's beaches. Another million cubic yards came a couple years later, the sand this time recovered from dredging operations along a nearby breakwater. In all, some thirty million cubic yards of sand have been dumped onto the beaches of Santa Monica and Venice. That's almost as much, by volume, as all the concrete used to build the Three Gorges Dam in China.“

https://www.kcet.org/shows/earth-focus/rewilding-santa-monic...