Seven posts down and one to go on my virtual book tour. I have been pleased with the previous two weeks of my "travels." Last Monday, I was on Brian Switek's Laelaps, where we had a Q&A mostly oriented around Brian's interest in all things paleontological. Next up was an interview with Michael Bradbury that he posted as an audio file on his RealScience, where he referred to me as a "big stone kinda guy...not one to shy away from a nice chunk of gneiss." What more could I ask for? And then on Friday, I ended with a discussion about technology and transportation with Gina Hagler on Synthesis.
Monday, August 31, 2009
Week Three of the Virtual Book Tour
Seven posts down and one to go on my virtual book tour. I have been pleased with the previous two weeks of my "travels." Last Monday, I was on Brian Switek's Laelaps, where we had a Q&A mostly oriented around Brian's interest in all things paleontological. Next up was an interview with Michael Bradbury that he posted as an audio file on his RealScience, where he referred to me as a "big stone kinda guy...not one to shy away from a nice chunk of gneiss." What more could I ask for? And then on Friday, I ended with a discussion about technology and transportation with Gina Hagler on Synthesis.
Tuesday, August 25, 2009
Alfred Wallace's Petrified Wood Tombstone
Three images of Wallace tombstone: From 1914, from 1999 (before restoration), from 2001 (after restoration). Oldest image is from James Marchant's book, Alfred Russel Wallace; Letters and Reminiscences. Modern shots both by George Beccaloni from his web site devoted to Wallace. Copyright of 1999 and 2001 images owned by George Beccaloni
His grave marker consists of a block of Purbeck limestone, often incorrectly called a marble because of its abilty to take a high polish, on which stands the petrified wood. According to a web site devoted to Wallace, the tree could have come from the Isle of Portland, which Wallace visited in 1894 with the famed American paleobotanist Lester F. Ward. The petrified wood on Wallace’s grave resembles a tree identified as Protocupressinoxylon purbeckensis, a conifer. These trees grew near a hypersaline lagoon in a Mediterranean-type climate of warm, wet winters, and hot, dry summers. The trees, many of which have been found upright, in situ, occur in the Great Dirt Bed of the Purbeck Formation. Deposition was around 146 million years ago.
In 1998, George Beccaloni, an entomologist at the Natural History Museum in London, visited Wallace’s grave and was surprised to find it in horrible shape. A tree engulfed the site and made it nearly impossible to see the plaque that mentioned Wallace. In addition the tree’s roots were pushing up the old marker. So in 1999, Beccaloni established the A. R. Wallace Memorial Fund to repair and restore Wallace’s grave.
With funding provided by a number of sources, Wallace’s site has now been restored and enhanced. The Fund added a granite block under the Purbeck limestone, to prevent further root encroachment, and placed a new plaque on the grave, which provides a few key details about Wallace’s life, including his contribution to evolution by natural selection. It is suitable way to honor one of the greats of natural history.
Sunday, August 23, 2009
Week Two of the Virtual Book Tour
Friday, August 14, 2009
The Virtual Book Tour of Stories in Stone
Greetings all. My new book Stories in Stone: Travels Through Urban Geology has now been out for about seven weeks. It has been exciting to see the response to it from friends, colleagues, fellow geologists, and people I don’t know. One response I did get was the suggestion of putting together a blog book tour, where I visit with other bloggers and discuss my book. In that light, I wanted to send out an advance notice that my tour will start next week.
My first stop will be at Clastic Detritus on Tuesday, August 18. Brian Romans has been kind enough to also give advance warning of the tour with his post today. He will also post a review of Stories in Stone on August 17, followed by our Q&A on Tuesday.
From Brian and his sedimentary focus, I turn on August 19 to architecture with John Hill’s A Daily Dose of Architecture. John sent me links to a variety of buildings that use stone and asked for my commentary on them.
I end the week, August 21, at my friend Lyanda Lynn Haupt’s The Tangled Nest. I will be writing a post for her tying together our interest in being urban naturalists, a topic she writes about in her wonderful new book, The Crow Planet.
On Monday, August 24, I return to geology with a Q&A on Brian Switek’s Laelaps. Brian has also kindly posted a review of Stories in Stone.
Two days later, August 26, you can hear my interview with Michael Bradbury, the driving force behind the web site Real Science. During a 45-minute-long interview we chat about deep time, granite countertops and radiation, and whether science influences the use of building stone. You will have to listen to find out the exciting answer!
At the end of the week, August 28, I head to Gina Hagler’s blog, Synthesis. Given Gina’s focus on looking at everything from sports to birds to writing, I am sure our discussion will be engaging.
Next, I head (well virtually) across the Atlantic on August 31 to Michael Welland’s Through the Sandglass. A fellow author, Michael has written the well-received Sand: The Never Ending Story.
And finally, to end the tour, on September 2 I get to bring together two passions of mine, bicycling and stone, on Tom Furtwangler’s colorful and ever enjoyable bikejuju.
Thursday, August 13, 2009
Brownstone Tombstones
Monday, August 10, 2009
Tree Stump Tombstones
Other stumps depict vines climbing the bark, a lamb at the base of a child’s tomb, doves nesting on branches, or frogs hiding in foliage. Not purely decoration, each design has symbolic meaning. A broken branch represents a life cut short. A frog alludes to resurrection. Doves symbolize peace. These are shibboleths, codes that united individuals to a larger community. Even in death the residents of limestone country looked to stone to forge a common bond.
My favorite carving of all though honors Louis Baker, a 23-year old stonemason, who died in April 1917, when lightning struck him at home. His co-workers sculpted an exact replica of how Baker left his work bench. On the upper edge of a slanted stone slab, they carved his metal square. Below rest a narrow drove and a stub-handled broom, one edge of which abuts a foot-long point. A wider chisel leans atop a hammer that just touches the sharpened end of the point. Nearby is the apron he tossed onto his mallet. The slab sits on another slab, propped on a bench so perfect in detail of the wood that one of the “boards” warps and others have cracks where someone, perhaps the young stonemason, had overtightened the bolts holding together the planks.
Friday, August 7, 2009
Almost Famous - Pain, Prynne, and Slate
Tuesday, August 4, 2009
Slow Stone on Snowdon
Photo of Hafod Eryri, the Welsh name for the building, from Snowdon Summit Blog
Slate quarrying was long Wales’ claim to fame and one of the most important industries in the country. Welsh slate was shipped around the world for use as gravestones, school slates, and most famously, for roofing. The men of the Welsh slate industry also traveled far. Poor working conditions, poor pay, strikes, and food shortages led to an exodus of Welsh workers to America in the 1840s. Their arrival jump started the nascent American slate industry and within a handful of years, slate from Pennsylvania, New York, Vermont, and Maine became the plastic of its day, a nearly ubiquitous material in the building trade.
Oddly, however, instead of using the 400-million-year old slate found on the sides of Snowdon, builders of the new structure imported their slate from Portugal. (Local granite, however, does clad the building.) I am sure that money was an issue but it seems odd to me that it wasn’t possible to find enough local slate to cover the roof of the building. Couldn’t the builders have simply gone around to abandoned quarries and just picked up some left over blocks of slate and made new roofing?