Group el: 0131 667 1000 667 0131 el: T [email protected] Borders RIGS Borders EH9 3 LA 3 EH9 Edinburgh Funding by Scottish Natural Heritage Natural Scottish by Funding Lothian and Lothian West Mains Road, Mains West ext by Cliff Porteous and Mike Browne. Designed by Derek Munn Derek by Designed Browne. Mike and Porteous Cliff by ext T Murchison House, Murchison Office). See See Office). www.bfrs.org. and www.james-hutton.org c/o British Geological Survey Geological British c/o , Borders RIGS Group and the British Geological Survey (Scottish Survey Geological British the and Group RIGS Borders oha n odr ISGroup, RIGS Borders and Lothian (1726 – 1797) – (1726 at Slighhouses, the Thomsons’ at Nether Monynut, Lothian and Lothian Monynut, Nether at Thomsons’ the Slighhouses, at Our address is: address Our Foundation for Rural Sustainability in partnership with Marshalls’ with partnership in Sustainability Rural for Foundation Founder of Modern Geology Geology Modern of Founder become involved in useful and interesting projects in the local area. local the in projects interesting and useful in involved become geological significance. This trail was initiated by the Borders the by initiated was trail This significance. geological Contact your local RIGS group now, at no cost, and you could you and cost, no at now, group RIGS local your Contact with the life and times of James Hutton including sites of sites including Hutton James of times and life the with From the portrait by Sir Henry Raeburn Henry Sir by portrait the From links locations associated locations links Trail, Hutton James Borders Scottish The at all levels. all at encouraging a wider appreciation of our Scottish earth heritage earth Scottish our of appreciation wider a encouraging reproduce the Raeburn portrait of James Hutton. James of portrait Raeburn the reproduce educational materials about such sites with the aim of aim the with sites such about materials educational to the Scottish National P National Scottish the to ortrait Gallery for permission to permission for Gallery ortrait professionals interested in producing information and information producing in interested professionals etching of the Jedburgh unconformity by John Clerk of Eldin, and Eldin, of Clerk John by unconformity Jedburgh the of etching Edinburgh Geological Society Geological Edinburgh . It consists of amateurs and amateurs of consists It . Sir John Clerk of Penicuik, Bt. for permission to reproduce the reproduce to permission for Bt. Penicuik, of Clerk John Sir Lothian and Borders RIGS (Labrigs) is a working group of the of group working a is (Labrigs) RIGS Borders and Lothian Acknowledgment is due to the following : following the to due is Acknowledgment Geomorphological Sites. Geomorphological RIGS stand for Regionally Important Geological and Geological Important Regionally for stand RIGS scientific, aesthetic and historical value to the local community. local the to value historical and aesthetic scientific, RIGS are sites chosen for their geoconservational, educational, geoconservational, their for chosen sites are RIGS Ferguson (1787) Ferguson Hutton with friends at Sciennes House, home of Professor Adam Professor of home House, Sciennes at friends with Hutton Dugald Stewart John Hume John Stewart Dugald Adam Ferguson Ferguson jnr Adam Smith Adam Ferguson jnr Adam Ferguson Burns Scott Joseph Black James Hutton James Black Joseph Scott Burns Antonia Reeve Photography Reeve Antonia of his time his of A man ahead man A James Hutton James In the collection of Abbotsford House Abbotsford of collection the In Map showing localities associated with Hutton with associated localities showing Map Meeting of Burns and Scott by Charles Martin Hardie. Hardie. Martin Charles by Scott and Burns of Meeting External Statue at the Scottish National Introduction Portrait Gallery, on the north-east Tower. Scotland between the years of 1730 and 1790 enjoyed a spell of intense intellectual activity known Hutton is depicted as the Scottish Enlightenment - a unique period in with a hammer in his right hand and rock history, one of optimism, improvement and View of Salisbury Crags from the Memorial Garden. discoveries in industry, commerce, agriculture, specimen in his left (sculptor David science and the arts. A plaque at the entrance from the car park at Edinburgh Watson Stevenson). University Centre for Sport and Exercise reads:- This James Hutton grew up during this period and made On his left is John memorial garden was constructed in 2001 for the University a considerable contribution to our understanding of Hunter the renowned of Edinburgh and marks the site of the house and garden of Earth processes and of the immensity of Time. He surgeon and James Hutton (1726 - 1797) at St. John's Hill. The garden was a landowner, farmer, agriculturalist, physician, anatomist. The contains a memorial plaque and five boulders (indicated on and an outstanding natural philosopher who was building stone is red, the key below) which illustrate two main themes of Hutton's elected to the Royal Society of Edinburgh. Hutton, wind-blown, desert geological work. of course pre-dated photography so the only clues sandstone of Permian Age (286-248 million Hutton used the presence of granite veins in metamorphosed we have as to his appearance come from painting sedimentary schist in Glen Tilt near Blair Atholl to demonstrate and sculpture, not all of which can be considered years old) from Dumfriesshire. that granite is an igneous rock and that it must have been life-like. younger than rocks it penetrated. The granite veins can be James Hutton's Theory seen in the two boulders from Glen Tilt. The three other boulders are conglomerate from Barbush near Dunblane and Processional frieze in the Scottish National Portrait Gallery. The surface of the Earth is constantly being eroded and the are full of fragments of older rocks, demonstrating the Left to right: Sir Henry Raeburn (painter), Lord Jeffrey products deposited in the sea. Hutton believed the continuity and cyclic nature of geological processes. (judge), Sir Walter Scott (novelist), John Hunter (surgeon), sediments were then compressed, folded and uplifted, Robert Burns (poet) in striped waistcoat, James Hutton sometimes with volcanic activity, for the cycle of erosion to (geologist), Thomas Telford (civil engineer), James Watt resume. He also said that earth processes of the past were (engineer, inventor of steam engine) and others. similar to those acting at present (a prevalent idea - Comte de Buffon 1790), and that the slow cycle was capable of repeating itself. He put it succinctly: “ the result, therefore, of our present enquiry is that we find no vestige of a beginning - no prospect of an end.” James Hutton Memorial Garden. This marks the site of James Hutton's Edinburgh home on St John's Hill in the Pleasance above Holyrood Road. Memorial garden boulders. The two lower boulders from Glen Tilt came from close to the Memorial actual spot investigated by Hutton. They show granite veins Garden penetrating the country rock. The upper boulder is full of Plaque fragments of pre-existing rocks from a previous cycle of erosion. Salisbury Crags Sill - Hutton's Section Siccar Point near Cockburnspath 1788 in Holyrood Park, Edinburgh Hutton believed that cyclic processes (similar to orbits in A key site in his new understanding of geology is at the south astronomy, and blood circulation in the body) operated in the end of this escarpment formed by the intrusive dolerite sill Earth. He saw weathering and erosion denuding the land and that is over 300 million years old. producing sediments under the sea which then consolidated Hutton associated 'extreme heat' as the agent of folding and into rock. The cycle was continued through uplift with the uplift of strata. The question as to what produced the heat necessary energy supplied by internal heat. He thought of the could not be answered at that time. Earth as a dynamic heat engine capable of helping to drive the In Hutton's own words “We know that the land is raised by a cycle. The most convincing proof of his cyclic theory was power which has for its principle subterraneous heat, but how obtained on the Berwickshire coast at Siccar Point, the third of that land is preserved in its elevated station, is a subject his unconformity sites which he visited with Sir James Hall which we have not even the means to form a conjecture.” and John Playfair. He believed that molten rock (magma) under pressure could Silurian sediments were laid down and consolidated into be 'intruded' between or across layers of sedimentary rocks, poorly sorted sandstones (greywackes). These rocks were sometimes reaching the surface as lava flows. He found uplifted, folded and eventually eroded. Deposition of fresh red evidence to support this in Holyrood Park. The photograph Upper Old Red Sandstone sediments took place during the shows a section of the Salisbury Crags sill where igneous rock following geological period of the Upper Devonian. The rock (called whinstone locally) has been intruded between cycle continued, sedimentary layers . Here at the base of the sill magma has Jedburgh etching of Inchbonny section 1787 resulting in the forced its way into the underlying sedimentary strata. Such John Clerk of Eldin's beautiful engraving is reproduced by present day a dynamic contact kind permission of Sir Robert Clerk of Penicuik picture. In this feature is incompatible spectacular with the then Inchbonny, Jedburgh (photographed in 2001) exposure, the gap contemporaneous view Here, at the second of his unconformity sites, at Inchbonny, in time that igneous rocks Hutton found nearly vertical sedimentary strata with represented by the 'crystallised like salt from horizontal Upper Old Red Sandstone red beds on top. He unconformity is sea water'. concluded that the vertical beds must have been raised above about 55million the surface of the ocean , subjected to the levelling effect of years! North Newton shore, Arran 1787 weathering and erosion before sinking below sea level when a Hutton discovered his first unconformity site in the summer new set of sediments mainly sandstones and mudstones were of 1787.