Tag: Erosion

Christmas Tree Beach

fionacroall1[Image: “Discarded Christmas trees were used to help rebuild the sand dunes around three years ago,” writes photographer Fiona Croall on her Instagram feed. “Now you can hardly see them!”].

While discarded Christmas trees here in New York City simply piled up on the sidewalks for more than two weeks after the holidays, forming strange—if still somewhat sadly picturesque—felled forests on the margins of the city, it turns out there’s an altogether more useful fate for those trees over in England.

There, the eroding beaches at Formby, just north of Liverpool, have been partially stabilized through Christmas tree donations.

formby[Image: The Christmas trees at Formby; photo courtesy National Trust/Robert Matthews].

“Our Rangers are asking people to bring their used real Christmas trees down to Formby so they can be used to help protect our internationally important sand dunes,” the National Trust explains.

The trees “help to mitigate [wind and erosion] by mimicking the action of the Marram grass, catching the sand blown on to the dunes from the beach and also dissipating the power of the wind as it blows across the surface of the dunes. Over time the trees become buried which helps to build up the dunes and they also help to partly stabilise the surface of the dunes which often allows the Marram grass to take hold again naturally.”

Below the beach, trees.

FionaCroall2[Image: The artificially stabilized beaches at Formby, with no sign of the displaced forest lurking below; photo by Fiona Croall].

Compare this approach, for example, to the widespread use of massive, industrially produced tetrapods for coastal erosion management—or even to the endless expense of so-called “beach nourishment”—and the idea of rebuilding the landscape using nothing more than linked chains of dead Christmas trees seems both tactically brilliant and cost-effective.

Not to mention archaeologically intriguing: it doesn’t take much to wonder how geotechnical assemblages such as these—huge arboreal lumps without a nearby forest to explain them—might appear to some distant researcher hoping to make sense of the stratigraphic record.

Like evidence of an ancient tsunami, the buried woods of Formby could surely sustain many a strange landscape theory to come.

(Huge thanks to photographer Fiona Croall who tweeted about the Christmas trees late last month).

Silt

The surface of the planet renews itself through geothermal hydrology, sulfuric lakes, new continents of silt –


– as natural acids scour shapes in slow terrains.

These are all photographs by Bernhard Edmaier, whose work can be found on his own website –


– and in the beautiful (if unfortunately named) Earthsong.

Meanwhile – though I repeat myself – these bring to mind J.G. Ballard’s novel The Drowned World, with its vision of a flooded, neo-tropical Europe, London become a backed-up toilet full of silt and Jurassic vegetation, “a nightmare world of competing organic forms returning rapidly to their Paleozoic past.”

Huge iguanas laze around in the heat. Buildings left and right are collapsing, their lower six floors immersed in polluted seawater, “miasmic vegetation… crowding from rooftop to rooftop.”

The city is fossilizing.

As Ballard writes: “A few fortified cities defied the rising water-levels and the encroaching jungles, building elaborate sea-walls around their perimeters, but one by one these were breached. Only within the former Arctic and Antarctic Circles was life tolerable.”

So the story goes that a research biologist is touring this neo-tropical London, boating from hotel to hotel across fetid lagoons, recording the types of plants that infest the city. Meanwhile monsoons are coming up from the south, everyone is dying of skin cancer and no one can sleep. The intensity of the sun’s radiation is making everything mutate.

In between some eyebrow-raising moments of ridiculous, pop-Nietzschean pseudo-philosophy – the surviving humans find themselves psychologically regressing down the totem pole of evolution toward… something or other; it’s all very psychedelic and 2001 – there are some cool descriptions of these new urban tropics:

“Giant groves of gymnosperms stretched in dense clumps along the rooftops of the submerged buildings, smothering the white rectangular outlines… Narrow creeks, the canopies overhead turning them into green-lit tunnels, wound away from the larger lagoons, eventually joining the six hundred-yard-wide channels which broadened outwards toward the former suburbs of the city. Everywhere the silt encroached, shoring itself in huge banks against a railway viaduct or crescent of offices, oozing through a submerged arcade… Many of the smaller lakes were now filled in by the silt, yellow discs of fungus-covered sludge from which a profuse tangle of competing plant forms emerged, walled gardens in an insane Eden.”

In any case, one could easily imagine Bernhard Edmaier’s photographs here bearing much in common with Ballard’s new alluvial world of fresh earth, architecture reduced to deltas of sand. Old eroded reefs of brickwork. Lagoons of pollution.


Erosion and hydrology, the most powerful urban forces on earth.

Urban Fossil Value

[Image: J.M. Gandy, speculations toward the ruins of John Soane’s Bank of England – but, again, how about speculations toward the Bank of England’s fossils…?]

As Hurricane Rita carves away at the Gulf shore, Galveston burns, buses explode outside Houston, and New Orleans refloods through badly built and incompletely repaired levees, I stumbled upon an old article, from 1998, about fossilized cities.

Millions of years from now, in geographical regions “entombed by tectonic disturbances,” entire cities – “the abandoned foundations, subways, roads and pipelines of our ever more extensive urban stratum” – will actually come to form “future trace fossils.”

These “future trace fossils,” the article says, form easily preserved systems that are “a lot more robust than [fossils] of the dinosaurs. They include roads, houses and foundations.”

And yet, for all that, only those cities “that were rapidly buried by floods or sandstorms” will be “preserved for posterity.”

Los Angeles, for instance, “is on an upward trajectory, pushed by pressure from the adjacent San Andreas Fault system, and is doomed to be eroded away entirely.” But if a city is flooded, buried in sand, or otherwise absorbed downward, “the stage is set to produce ideal pickling jars for cities. The urban strata of Amsterdam, New Orleans, Cairo and Venice could be buried wholesale – providing, that is, they can get over one more hurdle: the destructive power of the sea.”

It is often remarked in architectural circles how megalomaniacal Nazi architect Albert Speer came up with his so-called theory of ruin value, in which he proposed a new Romano-Fascist Berlin designed to look good as a ruin in thousands of years.

But that’s boring – let’s talk about cities fossilizing over millions of years.

Urban fossil value.

The already buried, subterranean undersides of our Tube-hollowed, war-bunkered modern cities “will be hard to obliterate. They will be altered, to be sure, and it is fascinating to speculate about what will happen to our very own addition to nature’s store of rocks and minerals, given a hundred million years, a little heat, some pressure (the weight of a kilometre or two of overlying sediment) and the catalytic, corrosive effect of the underground fluids in which all of these structures will be bathed.”

Who knew, for instance, that plastics, “which are made of long chains of subunits, might behave like some of the long-chain organic molecules in fossil plant twigs and branches, or the collagen in the fossilized skeletons of some marine invertebrates”? Who knew, in other words, that plastics will fossilize?

Indeed, “with a favourable concatenation of tectonics and sea level, our species could leave behind in a geological instant a much more striking record than the dinosaurs left in a hundred million years.”