Walker Lane

[Image: The shadow of the San Andreas Fault emerges near sunset at Wallace Creek; photo by BLDGBLOG].

All four long-term readers of BLDGBLOG will know that I am obsessed with the San Andreas Fault, teaching an entire class about it at Columbia and visiting it whenever possible as a hiking destination.

The San Andreas is often a naturally stunning landscape—particularly in places like Wallace Creek, Tomales Bay, or even the area near Devil’s Punchbowl—but the fault’s symbolism, as the grinding edge of two vast tectonic plates, where worlds slide past one another toward an unimaginable planetary future, adds a somewhat mystical element to each visit. It’s like hiking along a gap through which a new version of the world will emerge.

I was thus instantly fascinated several years ago when I read about something called the Walker Lane, a huge region of land stretching roughly the entire length of the Eastern Sierra, out near the California/Nevada border, which some geologists now believe is the actual future edge of the North American continent—not the San Andreas. It is an “incipient” continental margin, in the language of structural geology.

[Image: My own sketch of the Walker Lane, based on Google Maps imagery].

In fact, the Walker Lane idea suggests, the San Andreas is so dramatically torqued out of alignment at a place northwest of Los Angeles known as the “Big Bend” that it might be doomed to go dormant over the course of several million years.

That’s good news for San Franciscans of the far future, but it means that a world-shattering amount of seismic strain will need to go somewhere, and that somewhere is a straight shot up the Eastern Sierra along the Walker Lane: a future mega-fault, like today’s San Andreas, that would stretch from the Gulf of California, up through the Mojave Desert, past Reno, and eventually back out again to the waters of the Pacific Ocean (most likely via southwest Oregon).

Much of this route, coincidentally, is followed closely by Route 395, which brings travelers past extinct volcanoes, over an active caldera, within a short drive of spectacular hot springs, and near the sites of several large earthquakes that have struck the region over the past 150 years.

That region—again, not the San Andreas—is where the true tectonic action is taking place, if the Walker Lane hypothesis is to be believed.

[Image: The gorgeous Hot Creek Geologic Site, along the Walker Lane; photo by BLDGBLOG].

In an absolute dream come true, I was able to turn this armchair obsession of mine into a new feature for Wired, and it went online this morning as part of their May 2019 issue.

For it, I spend some time out in the field with Nevada State Geologist James Faulds, a major proponent of the Walker Lane hypothesis. We visited a fault trench, we hiked along a growing rift southeast of Pyramid Lake, and we met several of his colleagues from the University of Nevada, Reno, including geodesist Bill Hammond and paleoseismologist Rich Koehler.

I also spoke with early advocates of the Walker Lane hypothesis, particularly Amos Nur and Tanya Atwater, both of whom have been suggesting, since at least the early 1990s, that something major might be in store for this under-studied region.

[Image: Coso Volcanic Field, near where the Eastern California Shear Zone meets the Walker Lane; photo by BLDGBLOG].

The Wired story is almost entirely focused on the science behind discovering the Walker Lane, from GPS geodesy to LiDAR, but there are also a few scattered thoughts on deep time and the vast imaginative horizon within which geologists operate. This comes mostly by way of Marcia Bjornerud’s new book Timefulness. There is also a brief look at indigenous seismic experience as allegedly recorded in Native American petroglyphs along the Walker Lane, via an interesting paper by Susan Hough.

But, on a more symbolic level, the Walker Lane totally captivates me, including how vertiginous and exciting it is to think about—let alone to hike along!—a new edge to the known world, a linear abyss emerging in the desert outside Los Angeles, slowly rifting north through hundreds of miles of dead volcanoes and disorganized fault lines, gradually pulling all of it together into one clear super-system, flooding with the waters of the Gulf of California, bringing a new version of the Earth’s surface into being in real-time.

In any case, check out the piece over at Wired if any of this sounds up your alley. The piece includes some great photos by Tabitha Soren.

Great Basin Autoglyphs

[Image: Michael Light, from “Great Basin Autoglyphs and Pleistoseas”].

A new exhibition of work by photographer Michael Light opened last night at the Hosfelt Gallery in San Francisco.

[Image: Michael Light, from “Great Basin Autoglyphs and Pleistoseas”].

Called “Great Basin Autoglyphs and Pleistoseas,” the work is part of an “ongoing aerial photographic survey of the arid American West… moving from habited, placed settlements into pure space and its attendant emptiness.”

[Image: Michael Light, from “Great Basin Autoglyphs and Pleistoseas”].

Along the way, Light reframes human civilization as a series of abstract lines inscribed at vast scale through remote areas, less like infrastructure and more like planetary graffiti.

“Twelve thousand years ago,” Light writes, “the Great Basin—that part of the country between California and Utah where water does not drain to the ocean—was 900 feet underwater, covered by two vast and now largely evaporated historical lakes, Bonneville and Lahontan. The remnants of Lake Bonneville today are the Great Salt Lake in Utah and its eponymous salt flats, while the most famous portion of the former Lake Lahontan is the Black Rock Desert in Nevada, an alkali bed that floods and dries each year, creating the flattest land on earth.”

[Image: Michael Light, from “Great Basin Autoglyphs and Pleistoseas”].

Light is an incredibly interesting photographer, and has done everything from wreck-diving old military ships scuttled during nuclear weapons tests in the South Pacific to releasing a book of retouched archival photos from the Apollo Program.

Nicola Twilley and I interviewed Light several years ago for our Venue project, where we discussed these projects at length.

[Image: Michael Light, from “Great Basin Autoglyphs and Pleistoseas”].

In you’re near San Francisco, stop by the Hosfelt Gallery before March 16, 2019, and also consider ordering a copy of Light’s forthcoming book, Lake Lahontan/Lake Bonneville, with related images.

Milled landscapes / Michael Heizer

The question is whether you could hook-up a milling machine to the earth itself. Rather than exact, laser-cut incisions made into boards of hardwood, you would mill entire landscapes out of the open surface of the earth.

This could start small – cutting foundations, bore holes, etc. – but should immediately expand to include larger examples of terrestrial engineering: landscape architecture, earthworks, gardens, perhaps even dikes, dams, and other flood containment systems. The earth-miller could be operated like an ordinary, programmable milling machine today: you input the design required, the exact sequence and dimensions of the cuts, and the machine sets out, milling a new landscape into existence.

In a recent *New York Times Magazine* profile of earthworks/land-sculptor Michael Heizer, we read about “‘City,’ [Heizer’s] own version of Easter Island or Angkor Wat: a modernist complex of abstract shapes – mounds, prismoids, ramps, pits – to be spread across the valley. It was to be experienced over time, in shifting weather, not from a single vantage point or from above but as an accumulation of impressions and views gathered by walking through it. (…) ‘City,’ in its vastness, was meant to synthesize ancient monuments, Minimalism and industrial technology. The work derived inspiration from Mississippian tumuli (ancient North American mounds), the ball court at Chichen Itza in the Yucatan and La Venta in southern Tabasco… At the same time, it suggested airport runways and Modernist architecture.” (Michael Kimmelman, “Art’s Last, Lonely Cowboy”: 6 Feb 05).

Despite – or perhaps because of – the size of Heizer’s “City” (somewhere between the Washington Mall and Central Park, apparently), it’d be perfect for an earth-miller. Several programmable machines with self-sharpening mechanical grinders, pavement saws and rock sanders – and perhaps viab/nozzles, mentioned in an earlier post – set to work. It takes days, weeks even, but then it’s done: the milled landscape of a new earth, abstract volumes glowing in the sunlight.