
Wednesday, June 24, 2009
Earmarks and geology

Tuesday, June 16, 2009
The Most Beautiful Building Stone in the Country

Rectangular, two stories tall, and clad partially in brick, the Morton liquor store has a practical appearance, though it does incorporate some semblance of an aesthetic with the cornice and frieze. They have a pattern of outlined squares atop two, horizontal rows of raised bricks, which rest on another row of inverted, stepped pyramids. A faded red awning adds another touch of character, boldly proclaiming in large white letters, MORTON LIQUOR.
The gneiss starts below the cornice. Pink and black layers swirl around each other as if they are still fluid. Other layers look stretched and torn like taffy. Four inch-wide eyes of black minerals, complete with white eyebrows, dot the variegated layers. I cannot imagine trying to contemplate this wall of stone after spending a few hours partaking of the goods sold within.
Known in the trade as Rainbow Granite, the stone has been quarried in Morton since 1884. Cold Spring Granite has longed owned the quarry, which is opened on a limited basis. Because of the stone’s unusual color and patterns, it was a popular building material during the 1920s and 1930s, when Art Deco architecture was all the rage.

The Qwest Building in Minneapolis, originally the Northwestern Bell Telephone Building, built 1930-1932
Morton clad structures can be found around the country. The tallest is in New York, the 952-foot high AIG building (formerly Cities Service). The most northern is in Seattle, the Seattle Exchange Building. The closest to John Wayne’s birthplace in Winterset, Iowa, is in Des Moines, the Bankers Life Insurance Building. The most recently converted to lofts is in Birmingham, Alabama, the Watts Building.

Up close with the Morton Gneiss
Geologists had long known that the Morton Gneiss was very old but not until 1956 when Samuel Goldich and three other geologists published a crystallization date of 2.4 billion years did geologists learn how old. Previously, geologists had simply used undated terms such as primitive, Huronian, and Archean. Seven years after Goldich’s discovery, Ed Catanzaro pushed the date back to 3.2 billion years, the oldest age so far determined on this continent. Not to be outdone, Goldich reanalyzed the Morton and came up with a date of 3.55 billion years. In November 1974, the rock became even older when Goldich reported the Morton was 3.8 billion years old, not just the oldest rocks on North America but the oldest rocks on Earth. As one can imagine there was much rejoicing.
The Morton Gneiss Quarry, in Morton
Fame was fleeting though. By 1980, the age of the Morton had dropped back to 3.5 billion years. In 2006, Pat Bickford, emeritus professor of petrology at Syracuse University, led a team of researchers who obtained the Morton’s most up to date age of 3,524 million years. Although the Morton is but a babe compared to the oldest rocks on Earth, it is still the oldest, most commonly used building stone in the world. And, in my opinion, one of the best looking.
Friday, June 12, 2009
Poetry in Stone - Robinson Jeffers
“My fingers had the art to make stone love stone,” wrote Jeffers in a poetic tribute to Tor House. His intimate knowledge of rocks came from the years he spent finding, carrying, and placing boulders for his exquisite little home. During the 44 years he lived at Tor House, Jeffers developed what Loren Eisely called “one of the most uncanny and complete relationships between a man and his natural background, that I know in literature."

Looking toward the ocean from the garden at Tor House
I first saw Tor House and Hawk Tower in 2002 from the road that runs along the water below them. Light green grasses, gray-green shrubs and a few light gray boulders covered the slope leading up to the stone buildings. The house is squat with a narrow row of windows just below a small triangle of brown roof. The tower is square, about half the width of the house, and topped by a square turret with two eye-like windows opening out to the ocean behind me. The structures didn’t appear to be built so much as they appeared to emerge geologically from the hillside, as if Jeffers had used the nearby cliffs, seastacks, and outcroppings for blueprints.

Tor House and Hawk Tower
Up close, the buildings sustained my first impressions of geology manifest as home. No two stones were alike and rarely did stones of the same size rest next to each other. Edges were not perfectly straight but looked weathered and eroded. Barnacles still covered some of the stones Jeffers liberated from the sea. Finger trails ran through the mortar, trace fossils of a man and his passion.
Hawk Tower
His passion and intimacy with rock reveals itself in his poetry. I love his imagery of rocks as the “bones of the old mother” or the “world’s cradle.” Waves are “drunken quarrymen/Climbing the cliff, hewing out more stone for me.” The surf “cheerfully pounds the worn granite drum.” During erosion the “hills dissolve and are liquidated.”
And it is clear Jeffers felt the tremor of at least one earthquake. He wrote:
…the teeth of the fracture
Gnashed together, snapping on each other; the powers
of the earth drank
Their pang of unendurable release and the old resistances
Locked. The long coast was shaken like a leaf.
In a second, haunting description:
The heads of the high redwoods down the deep canyon
Rippled, instantly earthquake shook the granite-boned
ridge like a rat
In a dog’s teeth; the house danced and bobbled,
lightning flashed from the ground, the deep earth roared
yellow dust
Was seen rising in divers places and rock-slides
Roared in the gorges; then all things stilled and the
earth stood quiet.
Jeffers clearly paid attention to the natural world around him. Ever since his childhood he had had a connection to nature but not until he settled in Carmel and worked on the land did he develop the knowledge that gave him a voice to describe place. And this relationship centered on the house and tower he built from granite boulders on a low, barren knoll overlooking the sea.
“The place was maiden, no previous/Building, no neighbors, nothing but the elements, Rock, wind and sea,” wrote Jeffers in a poem titled The Last Conservative. How could he build any other type of structure? How could I not love that building? In his ode to Tor House, Jeffers concludes “My ghost you needn’t look for; it is probably here, but a dark one, deep in granite.”
Monday, June 8, 2009
America's First Commercial Railroad - Quincy Granite
It was a dark gray granite, which formed around 450 million years. Now known as the Quincy (pronounced Quin-ZEE) Granite, it is an unusual granite. Most granites contain two types of the mineral feldspar, broadly called plagioclase feldspar and alkali feldspar. In contrast, Quincy contains only alkali feldspar, a result of solidifying at a high temperature. Alkali feldspar gives the rock its characteristic green-tinted, dusky gray color. (One Quincy quarry owner called himself the “Extra Dark Man” because of the particularly dark stone excavated from his property.) Further darkening results from the Quincy’s nearly black quartz, as opposed to the more common clear or white varieties.
But back to Willard. The location of the granite presented a challenge. How would he move blocks that weighed up to 6 tons across the 12 miles of swamp, forest, and farms that separated Quincy from Charlestown, where the monument would be erected? Willard favored either a completely overland route or moving the stone in winter, when sledges could carry the blocks to the Neponset River, four miles north. A barge would transport the stone through Boston Harbor to Charlestown, which formed a peninsula on the north side of the Charles River, due north of downtown Boston.
Another engineer and associate of Willard’s, Gridley Bryant, however, suggested that a railroad would be more efficient. With the support of Boston merchant and philanthropist, Thomas Perkins, Bryant ended up designing what would become the first, commercial railroad in the United states. Pulled by horses, the railcar ran through a swamp and gently downhill to the river, where it ended at a 1,200-foot-long wharf, which took six months to build and cost two-thirds of the total $50,000 price of the railroad.
Bryant’s most innovative design was his rail car, fourteen feet long, eleven feet tall, and supported by six-and-one-half-foot high wheels. The empty car would back up to where the cut blocks were. Workers would turn gears on the car, which would lower a pallet supported by six chains. They would unhook the pallet, move the car forward, load a block or blocks, and back the car up again. One man could raise a six-ton block, which could be up to three feet wide and 32 inches high.

Scanned from the Quincy Historical Society newsletter, No. 26, Fall 1991
Bryant made the first test run of the railroad on October 7, 1826, on what became known as the Granite Railway. Workers loaded three cars with 16 tons of rock and a single horse pulled the entire load. Despite the railway's success, work didn't began on the monument till April 1827. It was finished in 1842. A formal dedication took place the following year, with 110 Revolutionary War veterans present, including 97-year-old Phineas Johnson, who had fought at Bunker Hill 68 years earlier. The cost to build the monument was $101,680, basically on budget.
Even before completion of the monument, its construction, as well as the development of the Granite Railway, led to granite finally becoming the preeminent building stone in Boston. Willard showed that large blocks could be used and transported, and by refining quarry techniques, he helped drive the price down by 75 percent. The popularity of the Quincy granite eventually led to 53 additional quarries opening around Quincy and gave the town its moniker, “The Granite City.”
A few remnants of the Granite Railway can still be at Willard's original quarry, as well as the Granite Rail Quarry. And the area is listed as a National Historic Place. Unfortunately, the great quarry was filled in several years ago with dirt from Boston's Big Dig.
Thursday, June 4, 2009
Whales in the Kitchen
Tuesday, June 2, 2009
"The Most Hideous Stone Ever Quarried"
Built in 1766, Harvard Hall is a stately Georgian structure that sits on a base of brownstone. I distinctly remember walking up to the building to look at the stone, which had succumbed to weathering. Making sure that no one was looking, I stroked the crumbling rock. Sand grains accumulated in my hand. They immediately transported me back to my beloved Utah.

Another use of brownstone, which shows how it can erode over time.
Although I had looked at brownstones for months it wasn’t until the sand grains of Harvard Hall nestled in my hand that I made the connection: what I had known as red rock in Utah, easterners called brownstone. Both are sandstone colored by iron, which in an oxygen-rich environment rusts and coats individual sand grains like the skin of an apple.
Quarries near Portland, Connecticut, are the birthplace for brownstone. The stone’s popularity grew throughout the middle 1800s and peaked in the early 1890s though not everyone appreciated the somber colored stone. Edith Wharton referred to its popularity as a "universal chocolate-coloured coating of the most hideous stone ever quarried."
By the late 1890s, the clamor for brownstone was over, driven primarily by a fatal problem; water and salt could penetrate its layers. When water freezes it expands nine percent. Salt has a similar property but instead of expanding it grows. Both processes can wreak havoc on a building block.

The former Portland, CT quarries, now flooded.
Quarrying for brownstone ended in the 1920s. In 1993, however, an ex-coal miner named Mike Meehan opened a small quarry on a ledge north of the original quarries. He knew nothing about quarrying brownstone. “Being a coal miner, I was more adept at blowing things up,” says Meehan. “But at the end of the day, I knew I wanted to be small scale and to be making a product.”
Meehan’s first contract was for a restoration project at Gallaudet University in Washington, D.C. Institutions have continued to order his stone, which he has sent to Brown University, Yale, and Pratt Institute. In recent years, after acquiring his own milling saw, he has been providing detail pieces, such as steps and lintels, for more and more high end homes, including one in Brooklyn, which I visited.
Meehan's restoration in Brooklyn
Meehan cut the new blocks to emphasize the bedding planes of the Portland rock. Each block is different with a variation in grain size, color, and bed thickness. They have a warmth and substantial nature to them, unlike the adjacent restorations, which obtain their look with stucco.
Monday, June 1, 2009
The Giro and The San Pietrini
But then Menchov’s front wheel slipped out from under him and he went tumbling at probably 50 km/hour. The thin tire couldn’t grip the hard lava stones, which come from outcrops near Rome. These are the stones I wrote about in a previous post that Vitruvius described as hard and enduring. Many reporters described them as icy smooth because of the rain. Locals call the cobbles, “San Pietrini,” little Saint Peters, playing on St. Peter’s role as the rock of Christianity.
I have an update to add on this blog. Marie Jackson, who has written extensively about the stones of Rome, has told me that the San Pietrini stone comes from the Capo di Bove lava flow, 277,000 +/- 2,000 years old. The lava erupted from the Faete peak of the Alban Hills volcano, southeast of Rome. Stone comes from a quarry near the Ciampino airport.
(Photo of the cobbles from VeloNews.
To see a video of the fall, you can watch this YouTube link.)