As I hike the hills and crags of Holyrood Park, I often pass a site associated with an alumnus of the University of Edinburgh, where I now attend. It’s not a spectacular site; in fact, it’s just a little stony outcropping that anyone other than a geologist might just pass by or clamber down without a thought. The more observant might notice that there are some nice colors and stripes in the rocks. If not for the fading white printed sign attached to a nearby stone, low enough to step right over it without noticing, no one might know that something important happened here.
Well, two somethings. One took a long time, one much less so. First, over millions of years, minerals were laid down and pressed into sandstone, a band of which pressed and warped against a dolerite sill, a remnant of the ancient volcano that created Arthur’s Seat. In fact, all manner of different processes created Arthur’s Seat, Salisbury Crags, and the other formations of Holyrood Park.
So the second important thing that happened to which I refer is that a sharp-eyed person of particular curiosity and intelligence noticed. In the mid-to-late 1700’s, James Hutton, a native of Edinburgh born on June 3, 1726, and who died here March 26, 1797, closely explored this area. He was a trained chemist and medical doctor, farmer and entrepreneur turned scientist. Hutton spent a great deal of time touring farms and open lands in Scotland, observing farming practices with a professional eye and rock and land formations with a scientific one.
Hutton’s careful observations led him to formulate the theory of uniformitarianism. This theory holds that the earth and its formations were generally not created quickly, in cataclysmic or miraculous events, but very slowly, over vast expanses of time, in slow but regular processes such as sedimentation, erosion, volcanism, and uplift. Hutton published his ideas in his two-volume magnum opus Theory of the Earth in 1795. His demonstration that the Earth was very old indeed made later scientific theories whose justifications required vast expanses of time, notably Charles Darwin’s theory of evolution by natural selection, possible.
Scroll down to see my photos of Hutton’s Section in Holyrood Park and its explanatory sign, and learn more about the great James Hutton through the links below:
James Hutton (1726 – 1797) ~ from ‘Alumni in History’ at the University of Edinburgh’s website
James Hutton: The Founder of Modern Geology ~ excerpt from Earth: Inside and Out, at the American Museum of Natural History website
James Hutton: Scottish Geologist ~ by the editors of Encyclopaedia Britannica
~ Ordinary Philosophy is a labor of love and ad-free, supported by patrons and readers like you. Any support you can offer will be deeply appreciated!