National Grid Reference
NT 241 720
History
Edinburgh, the metropolis of Scotland and county town of Midlothian, is situated 2 miles S of the Firth of Forth. Its Observatory on the Calton Hill stands in lat. 55° 57' 23" N, and long. 3o 10' 30£ W. It is SSW of Aberdeen, S by W of Dundee, S by E of Perth, E by N of Glasgow, NE of Ayr, and N by E of Dumfries. Its distance in straight line, as the crow flies, is 186 miles from John o' Groat's House, and 337 from London. Its distance, by road, is 35½ miles from Stirling, 42 from Dundee, 42¾ from Glasgow, 44 from Perth, 49 from Hawick, 57 from Berwick-upon-Tweed, 71 from Dumfries, 92½ from Carlisle, 108 from Aberdeen, 156½ from Inverness, and 392 from London; while, by railway, the distance is 36 miles from Stirling, 45 from Perth, 47½ from Glasgow, 49½ from Dundee, 53 from Hawick, 57¾ from Berwick-upon-Tweed, 88 from Ayr, 90 from Dumfries, 98 ¼ from Carlisle, 112¾ from Aberdeen, 163 from Stranraer, 189 from Inverness, and 398½ from London by way of the Trent Valley or Midland Railway, 402 by way of Carlisle and Birmingham or London and North-Western, 407½ of Berwick and York, Great Northern and East Coast.

Site.—The city is built on ridges of east-and-westward extension of varying height, and on the valleys between or the slopes beyond. The hills are partly overlapped by, and partly extend beyond, the city; they occupy an area within a circuit of about 6 miles; and, at their northern margin, about 2 miles from the Firth, are bounded by a slightly inclined plain, which extends from them to the shore. These hills consist mainly of erupted rocks, thrown up from what was once a flat surface by a series of upheavals, and afterwards much modified by denudation and other causes; and, in their natural state, before they were taken possession of by man, must have formed a singularly striking and imposing group. Arthur's Seat, to the SE of these, rises 822 feet above sea-level, sloping or rolling to the E over a base of nearly a mile, and presenting to the W a bold, precipitous, diversified-face of rugged rock, with an outline, as seen at short distances a little to the S of W, resembling that of a lion couchant. A sloping valley lies along the W base of this hill, known as the Hunter's Bog, which, though not long ago as solitary as any remote Highland glen, is now used almost daily by the Edinburgh garrison and local volunteers as a range for rifle practice. Westward of this valley the ground rises regularly over a base of about 700 yards, till it attains a height of 574 feet above sea-level; then in a semicircle, sweeping round convexly from the S to the N, breaks sheer down in the rugged greenstone precipices of Salisbury Crags. At the base of these crags there is a footpath several feet in width, vulgarly known as the Radical Road, from which a most commanding and beautiful prospect is obtained. A belt of low ground, variously flat, sloping, and undulating, lies round the skirts of these two hills, the whole attached to the royal grounds of Holyrood, and included in what is now called the Queen's Park. The Calton Hill, which commences about 200 yards NW of the N end of the Salisbury semicircle, rises, in somewhat rounded contour, to an altitude of 348 feet above sea-level, and represents, to the NW, an abruptly sloping face, overlooking what was an old village, called Greenside; but, in other directions, the declivities, though rapid, are by no means steep, and it has here been so terraced by art as to afford room for rows all round of elegant private houses. It bears on its shoulders and summit various public buildings and monuments; and, like the loftier hills to the SE, is distinguished for the magnificence of the views which it offers, as well as the additional feature it contributes to the general aspect of the city.

The ground to the W of the hollow at the base of Salisbury Crags rises in rapid gradient, till, at the distance of 500 yards, it attains an elevation in St Leonard's Hill of 248 feet; and forms thence a broadbacked ridge of about 1400 yards from E to W. This ground declines from its summit to a flanking ravine on the N, and slopes S by imperceptible gradation, till, at the distance of a mile, it merges in flat or softly undulating open country. It is covered over nearly all its area by the streets and suburbs of the more modern section of the Old Town. The ravine stretching E and W along the N base of this ridge is occupied by an ancient street known as the Cowgate, once the abode of the nobles and grandees of Scotland, but now a haunt of the poorest classes, bearing nearly the same relation to Edinburgh as the district of St Giles bears to London. A hill, which has been aptly compared to a long wedge lying flat on the ground, ascends gradually westward from the hollow between Salisbury Crags and the Calton Hill, to a distance of 1800 yards, flanking closely the N side of the Cowgate. It commences on the E at level ground in front of Holyrood Palace, and terminates on the W, at an altitude of 437 feet above sea-level, in the frowning citadel crowning the grandly massive precipice of the Castle rock. It was along the ridge of this hill that the original city was at length built, which consisted, as it still does, of one long street stretching steadily upwards from the Palace to the Castle, flanked all the way by tall tenements, and sending off no end of close lanes of similar piles in downward slope to the right and left, so that the whole has been compared to some huge reptile figure, of which the closes were the lateral members, Holyrood the tail, and the Castle the head. A vale, averaging about 200 yards wide, extends along the N base of this wedge-shaped hill, which, where it lies under the wing of the city proper, was formerly the bed of a sheet of water, called the Nor' Loch; but is now drained, being occupied partly by public gardens, partly by railway lines and a station, and crossed by a mound and bridges. An eminence, or very gentle and broad-backed ridge, with features much less salient than those of any of the other rising-grounds, ascends northward from the vale to a distance of about 250 yards, and descends thence, in the main, in a long easy slope, to the plain between the city and the Firth. It swells, near its eastern extremity, into a considerable rounded shoulder, terminating at that end in a curving gorge which separates it from the Calton Hill; declines, at its W extremity partly in almost imperceptible slope to the environing low ground, partly in considerable declivity to the banks of the Water of Leith; and bears, on its southern half, the original New Town, and on its northern half and western slopes, the second New Town.

Most travellers who have visited both cities have remarked a resemblance, as to site and general appearance, between Edinburgh and Athens. Stewart, the author of The Antiquities of Athens, was the first to remark and describe the similarity; and he has been followed by Dr Clarke, Mr H. W. Williams, and any other descriptive writers well qualified to form a correct judg ent, so that Edinburgh has, by almost general consent, been called `Modern Athens,' and the `Athens of the North.' `The distant view of Athens from the Ægean Sea,' says Mr Williams, `is extremely like that of Edinburgh from the Firth of Forth, though certainly the latter is considerably superior.' `There are,' he adds, 'several points of view on the elevated grounds near Edinburgh, from which the resemblance between the two cities is complete. From Torphin in particular, one of the low heads of the Pentlands immediately above the village of Colinton, the landscape is exactly that of the vicinity of Athens as viewed from the bottom of Mount Anchesmus. Close upon the right, Brilessus is represented by the Mound of Braid; before, in the abrupt and dark mass of the Castle, rises the Acropolis; the hill Lycabettus, joined to that of the Areopagus, appears in the Calton; in the Firth of Forth we behold the Ægean Sea; in Inchkeith, Ægina; and the hills of Peloponnesus are precisely those of the opposite coast of Fife. Nor is the resemblance less striking in the general characteristics of the scene; for, although we cannot exclaim, "These are the groves of the Academy, and that the Sacred Way! " yet, as on the Attic shore, we certainly here behold " a country rich and gay, broke into hills with balmy odours crowned, and joyous vales, mountains and streams, and clustering towns, and monuments of fame, and scenes of glorious deeds, in little bounds." It is, indeed, most remarkable and astonishing that two cities, placed at such a distance from each other, and so different in every political and artificial circumstance, should naturally be so alike. 'When comparing the two cities as to their interior structure, however, Mr Williams sees a considerable difference between them, and pronounces Edinburgh to be the superior. He says, `The epithets Northern Athens and Modern Athens have been so frequently applied to Edinburgh that the mind unconsciously yields to the illusion awakened by these terms, and imagines that the resemblance between these cities must extend from the natural localities and the public buildings to the streets and private edifices. The very reverse of this is the case; for, setting aside her public structures, Athens, even in her best days, could not have coped with the capital of Scotland.'

Scenery.—Edinburgh, from whatever point the eye regards it, presents a variety of scenic groupings of such singular effect as is met with in no other city of the world. Though there is nothing gorgeous or sumptuous in any one feature, neither is there anything mean; it is, in a scenic regard, a city all over, and bespeaks a presence as of something at once grand and venerable. A stranger coming within fair view of it from any quarter sees no aërial dome towering above a sea of of humbler piles as in Rome and London, and no grove of turrets shooting up from some majestic cathedral as in Milan and York; but, wherever he turns, there is presented to him a rich and varied assemblage of substantial, often imposing, structures-now retiring into the valleys, now climbing the acclivities, now spreading over the slopes, and anon crowning the summits of its romantic hills. He observes nowhere, as in so many of the other cities of world repute, a mere dingy conglomeration of commonplace houses, clustered round some magnificent edifice, or hugging the environs of some handsome airy street, but on all hands elegance, beauty, variety, and grandeur struggling for ascendancy, and contributing by their harmony to produce the most unique and superb effects. Plainness, poverty, unsightliness, even offensive squalor, as well mal-arrangement and positive confusion, do, as in all our large towns, indeed challenge censurable regard; but these do not strike the eye with such obtrusiveness as to mar the general effect, or, if they do, it is often with some redeeming feature or association as to contribute to, rather than detract from, the impression the city as a rule imparts. Nor, as the eye surveys them, are the surroundings, far as well as n ear, of the city, the framework in which the jewel is set, less striking than the interior. These extend from the Lammermuirs on the SE to the Grampians on the NW, and from the open sea of the German Ocean to the very sources of the Forth; and, besides what may still further be regarded as back-ground, consisting of high lands and low, they embrace nearly the whole of the Firth, a great part of Fife, and a still greater part of the richly cultivated, fairly wooded, hill-and-dale expanse of the Lothians; so that, if we except the moodily desolate, the wildly grand, and the savagely terrible, there is hardly a single aspect of Nature to be met with elsewhere of which we may not trace some feature here. It is thus these scenes are described by Delta in the well-known lines-

'Traced like a map the landscape lies,
In cultured beauty stretching wide;
There Pentland's green acclivities,
There ocean with its azure tide,
There Arthur's Seat, and, gleaming through
The southern wing, Dunedin blue;
While in the Orient Lammer's daughters,
A distant giant range, are seen,
North Berwick Law, with cone of green,
And Bass amid the waters.'

Picturesque views of the city, either by itself or in combination with strips of foreground, may be obtained from various points all round and beyond the outskirts, each one of which, as it embraces separately distinct features and groupings, will be found to be more or less substantially different from the others. One at hand on the W, especially from the lands of Coates, takes in the new princely piles in the neighbourhood, the spire of St Mary's Cathedral, the dome of St George's parish church, the campanile of Free St George's, with, farther back, the tower and pinnacles of St John's, and the massive, bastioned, mural rock of the Castle; while at a station more remote, particularly from Corstorphine Hill, a view of wider range is obtained, which, besides including the objects mentioned in diminished proportions, embraces a great part of the New Town as it slopes down to the shores of the Forth, with the heights of the Old declining away eastward, dominated by the smoke-veiled cliffs of Salisbury Crags with Arthur's Seat in their rear. A near view from the N side, especially one from Warriston Cemetery and another from the Botanic Garden, comprises all the New Town to the N as it slopes upward to the Old Town with its towers and castle-battlements invading the sky, flanked to the right by the heights above the Dean, and to the left by the Calton Hill with its monuments, and another sideward view of Arthur's Seat and the Crags. Farther N this view, though always of course on a smaller scale, becomes more and more picturesque, till, as you approach and land on the Fife shores right opposite, the whole assumes a toy-box dimension, with the ports of Leith and Granton on the foreground and the blue ridges of the Lammernirs and the Pentlands traced on the vault behind. Views of the city from the E may be obtained from the Calton Hill, Salisbury Crags, and Arthur's Seat. That from the Calton Hill, from which the view all round is of a kind to baffle description, overlooks the city along the line of Princes Street with the New Town, backed- by the western hills, on the right, as it first rises with its spires and monuments, and slopes away down to the N; and the Old Town on the left, as it slopes upwards, flanked by the Crags, from Holyrood to the Castle summit, with the hazy Pentlands looming in the background.

The view from the face of Salisbury Crags is thus described by Sir Walter Scott: `The prospect, in its general outline, commands a close-built, high-piled city, stretching itself out in a form which, to a romantic imagination, may be supposed to represent that of a dragon; now a noble arm of the sea, with its rocks, isles, distant shores, and boundary of mountains; and now a fair and fertile champaign country, varied with hill, dale, and rock, and skirted by the picturesque ridge of the Pentland mountains; but as the path gently circles around the base of the cliffs, the prospect, composed as it is of these enchanting and sublime objects, changes at every step, and presents them blended with, or divided from, each other in every possible variety which can gratify the eye and the imagination. 'The view from the top of Arthur's Seat is much the same as that from Salisbury Crags, except that it is more sweeping, and has the crest of the crags on the western foreground. A good view from the E of the city proper, exclusive of the environs, is obtained from St Anthony's Chapel. Here at his feet the spectator sees on the right the northern section of the Queen's Park, with Holyrood Palace and the Chapel Royal; beyond these, the terraced ascent of the Calton Hill, with its tiers in rows and separate piles of remarkable architectures and sculptures; in front the valley between the Old Town and the New, spanned by the lofty North Bridge; and toward the left, all the old city itself, towering upward from the point of the wedge, ridge above ridge, and grandly fretted and crowned with heaven-pointing spires and defiant battlements. The views from the S, both near and distant, are at once numerous and excellent, most of these affording distinct profiles of Arthur's Seat and Salisbury Crags on the right and of the Castle rock and ramparts on the left, with much of the intermediate architecture of the Old Town and the suburb of the city in the foreground, which already all but occupies the entire southern slope. One of the noblest on this side is the view from Blackford Hill, and is thus described by Sir Walter Scott as seen by Lord Marmion, `fairer scene he ne'er surveyed:'

'The wandering eye could o'er it go,
And mark the distant city glow
With gloomy splendour red;
For on the smoke-wreaths, huge and slow,
'That round her sable turrets flow,
The morning beams were shed,
And tinged them with a lustre proud
Like that which streaks a thundercloud.
Such dusky grandeur clothed the height
where the huge castle holds its state,
And ail the steep slope down,
Whose ridgy back heaves to the sky,
Piled deep and massy, close and high,
Mine own romantic town!
But northward far, with purer blaze,
On Ochil mountains fell the rays,
And as each heathy top they kissed,
It gleamed a purple amethyst.
Yonder the shores of Fife you saw;
Here Preston Bay and Berwick Law;
and broad. between them rolled,
The gallant Firth the eye might note,
Whose islands on its bosom float,
Like emeralds chased in gold.'

The views of the city from the interior are often no less striking than those from without, and the former as well as the latter often give rise to impressions that are quite unique. Not to mention the ore artificial adornments, architectural and other, with their grouping and array, there are the imposing natural features, with beetling cliffs and hollow or open dells, and rich interspaces of wooded lawn, tended by the art of the gardener, and interspersed or bordered here and there with gay parterres. The streets also, even in the central parts, afford, through abrupt openings, numerous prospects, both charming and extensive, along unobstructed vistas, or over asses of house-tops, away, by varied landscape, over firth and dale, on to the often far-off mountains, and in one direction the open sea. `The finest view from the interior,' says Alexander Smith, `is obtained from the corner of St Andrew Street, looking W. Straight before you the Mound crosses the valley, bearing the National Gallery buildings; beyond, the Castle lifts, from grassy slopes and billows of summer foliage, its weather. stained towers and fortifications, the halfmoon battery giving the folds of its standard to the wind. Living in Edinburgh there abides, above all things, a sense of its beauty. Hill, crag, castle, rock, blue stretch of sea, the picturesque ridge of the Old Town, the squares and terraces of the New-these things, seen once are not to be forgotten. The quick life of to-day sounding around the relics of antiquity, and overshadowed by the august traditions of a kingdom, makes Edinburgh more impressive than residence in any other British city. What a poem is that Princes Street! The puppets of the busy any-coloured hour move about on its pavement, while across the ravine Time has piled the Old Town, ridge on ridge, grey as a rocky coast washed and worn by the foam of centuries, peaked and jagged by gable and roof, windowed from basement to cope, the whole surmounted by St Giles's airy crown. The New is there looking at the Old. Two Times are brought face to face, and are yet separated by a thousand years. Wonderful on winter nights, when the gully is filled with darkness, and out of it rises, against the sombre blue and the frosty stars, that mass and bulwark of gloom, pierced and quivering with innumerable lights! There is nothing in Europe to match that. Could you but roll a river down the valley, it would be sublime. Finer still, to place one's self near the Burns' Monument and look toward the Castle. It is ore astonishing than an Eastern dream. A city rises up before you painted by fire on night. High on air a bridge of lights leaps the chasm; a few emerald lamps, like glowworms, are moving silently about in the railway station below; a solitary crimson one is at rest. That ridged and chimneyed bulk of blackness, with splendour bursting out at every pore, is the wonderful Old Town, where Scottish history mainly transacted itself; while, opposite, the modern Princes Street is blazing throughout its length. During the day the Castle looks down upon the city as if out of another world; stern with all its peacefulness, its garniture of trees, its slopes of grass. The rock is dingy enough in colour; but, after a shower, its lichens laugh out greenly in the returning sun, while the rainbow is brightening on the lowering sky beyond. How deep the shadow which the Castle throws at noon over the gardens at its feet where the children play! How grand when giant bulk and towery crown blacken against sunset! Fair, too, the New Town sloping to the sea. From George Street, which crowns the ridge, the eye is led down sweeping streets of stately architecture to the villas and woods that fill the lower ground and fringe the shore; to the bright azure belt of the Forth, with its smoking steamer or its creeping sail; beyond, to the shores of Fife, soft blue, and flecked with fleeting shadows in the keen clear light of spring, dark purple in the summer heat, tarnished gold in the autumn haze; and further away still, just distinguishable on the paler sky, the crest of some distant peak carrying the imagination into the illimitable world. ' The finest close view of the northern half of the city is seen at the head of the Castle Hill, from the N side of the Castle esplanade; or, still better, from the bomb-battery of the Castle itself, where the lovely space between the Old Town and the New appears almost perpendicularly under the eye, with the Scott Monument on its further verge, the Melville Monument rising a little beyond, and the greater part of the New Town all around.

'Saint Margaret, what a sight is here!
Long lines of masonry appear;
Scott's Gothic pinnacles arise.
And Melvilie's statue greets the skies,
And sculptured front and Greeian pile
The pleased yet puzzled eye beguile;
From yon far landscape where the sea
Smiles on in softest witchery;
Till, riant all, the hills of Fife
Fill in the charms of country life.'

Geology.—Edinburgh has always been a favourite field for geological investigation. Ever since the days of Hutton, the volcanic rocks which are so well developed on Arthur's Seat, the Calton Hill, and at the Castle, have been the subject of careful study among geologists. The striking features to which these igneous rocks give rise, arrest the attention even of the non-scientific observer. Indeed, few cities present such remarkable facilities for examining the structure and physical relations of ancient volcanic rocks. The literature bearing on the geology of Edinburgh and its environs is rather voluminous. Amongst the various writers on the subject, the names of Hutton, Playfair, Sir James Hall, Hibbert, Jamieson, Hay Cunningham, Edward Forbes, Hugh Miller, Charles M `Laren, A. Geikie, R. Chambers, Miller Home, and Judd, may be entioned. Special reference ought to be made to the admirable volume on The Geology of Fife and the Lothians, by Charles M 'Laren, and to Professor A. Geikie's lucid description of the Geology of Edinburgh. *

* Geological Survey Memoir accompanying Sheet 32 of the 1-inch Map.

With the exception of Blackford Hill, which is a continuation of the Lower Old Red Sandstone volcanic rocks of the Pentlands, the newer portion of Arthur's Seat, and several isolated veins of igneous rock, the solid rocks which underlie the city of Edinburgh and Leith belong to the lowest divisions of the Carboniferous system. On account of the strata being largely impregnated with lime, they were appropriately named by M 'Laren the Calciferous Sandstone Series-a term which is now generally applied to them. They may be arranged in three divisions:-

Calciferous
Sandstone
Series.
Cementstone
Series.
3. An upper division of white sandstones, black and blue shales, containing nodules of clay ironstone.
2. A middle division of interbedded volcanic rocks, consisting of basalts, porphyrites, and tuffs, with intercalated beds of sandstone.
Red Sandstone
Series.
1. A lower division of red and mottled sandstones, red, green, and grey shales and marls, with calcareous nodules and bands merging occasionally into pure limestones. Coarse conglomerates occur at the base of this group.

The members of the lowest division occupy an irregular area, bounded by the Braid Hills on the S, Arthur's Seat on the E, and the Calton Hill on the N, while the western limit is sharply defined by the great fault extending from Craiglockhart north-eastwards by Merchiston and the Castle esplanade, to the NW slope of Calton Hill. Within this area the strata are arranged in the form of a low arch, the crest of which runs from Blackford Hill to St Andrew Square. As this anticlinal fold is truncated on the W by the fault just referred to, it is only on the E side of the arch that the complete succession can be traced. The lowest beds are exposed in the neighbourhood of Blackford Hill where they consist of conglomerates composed of pebbles, chiefly derived from the Old Red Sandstone volcanic rocks. They rest unconformably on these igneous rocks, and are not faulted against them as has hitherto been supposed. It is important to note that the strata to the W of Blackford Hill occupy a higher horizon than those on the E side. As we pass to the SW this overlap gradually increases till the members of the Upper or Cementstone Series rest directly on the Old Red Sandstone formation. This overlap indicates the gradual submergence of the Pentland ridge in the early part of the Carboniferous period. At the beginning of that period the Pentlands formed a promontory jutting far into the sea, in which the red sandstones were deposited, but eventually the ridge was submerged and buried beneath the accumulating sediment of the succeeding groups. Excellent sections of these basement conglomerates are to be seen at present in the cuttings of the new Suburban railway.

Next in order come the sandstones of Craigmillar, and the strata which are exposed in the southern part of the town, consisting of red sandstones with red and green marls. In the districts of Newington, Grange, the Meadows, and Warrender Park, these beds dip to the N at angles varying from 10 to 15 degrees, while to the W of these localities they dip to the NW-thus indicating the dome-shaped arrangement of the strata. Excellent sections have been recently exposed in the course of excavations in Warrender Park. They also occur in Gilmore Place with an inclination to the NW, and they reappear at the head of Keir Street with an easterly dip. The anticlinal axis must therefore run northwards between these two points. The same beds are well displayed on the S slope of the Castle esplanade as seen from Johnston Terrace. In this well-known section, the honeycombed sandstones with red and green marls are brought into conjunction with the plug of basalt on which the Castle stands, by the great fault already referred to. They dip to the E at an angle of from 15 to 20 degrees, but as they approach the fault they become horizontal, and eventually bend over till they conform to the hade of the fault which is inclined at an angle of 80 degrees to the NW. The SE slope of the plug of basalt is beautifully slickensided. The striæ, however, are not vertical, but are slightly inclined to the NE, showing a faint lateral thrust in that direction, as well as a downthrow to the NW. From the Castle eastwards to Holyrood and the Hunter's Bog there is a continuous easterly dip at an average angle of 15 degrees, where they pass conformably below the interbedded volcanic rocks of Arthur's Seat (division 2). Fossils rarely occur in the red sandstones. Fragments of wood have been found in the beds at Craigmillar, which are probably the remains of pine-like Araucearia. In the quarry above Salisbury Crags, a small Estheria Peachii was found by Mr Grieve. Under St Anthony's Chapel, in a bed crammed with vegetable matter, Mr Bryson found specimens of Dadoxylon, and Professor A. Geikie obtained fragments of Poacites and the remains of Rhizodus Hibberti. The beds at that locality lie above the first interbedded lava-flow, now represented by the Long Row, and it is probable, therefore, that they belong to the Cementstone Series.

Towards the close of the deposition of the red sandstones, volcanic activity seems to have begun in the neighbourhood of Edinburgh. From certain volcanic orifices, streams of lava and showers of ashes were ejected and spread over the sea-floor, which at intervals were commingled with ordinary sediment. The records of this volcanic action are still preserved to us on Arthur's Seat, the Calton Hill, and at Craiglockhart. These interbedded volcanic rocks must be carefully distinguished from the three great intrusive sheets of igneous rock which were injected between the red sandstones forming the western base of Arthur's seat. On account of their durability these intrusive sheets have more successfully resisted the denuding agencies than the intervening sandstones, and hence they now for the prominent escarpments of St Leonard's, Salisbury Crags, and the Dasses. The first outflow of lava is represented by the compact basalt of the Long Row which is overlaid by tuffs, volcanic breccias, and ashy sandstones which are well exposed at the Dry Dam. The general character of these volcanic ashes is different from the coarse agglomerate which now forms the higher part of the hill, and which was ejected at a much later date. The tuffs and ashy sandstones are succeeded by basaltic lavas and porphyrites, the latter forming the slopes of the Whinny Hill and Dunsappie. The junction of these rocks with the overlying shales and sandstones (division 3) is not seen on the eastern slope of Arthur's Seat, owing to the covering of superficial deposits. The evidence is supplied, however, by the section on Calton Hill.

The contemporaneous volcanic rocks of Arthur's Seat are truncated on the N side by an E and W fault-an offshoot from the main dislocation trending from Craiglockhart by the Castle to the NW slope of Calton Hill. This branching fault has a downthrow to the N, and by means of it the outcrop of the interbedded volcanic rocks of Arthur's Seat has been shifted about half a mile to the W as far as the Calton Hill. The existence of this fault was clearly proved several years ago in the course of draining operations along the Canongate, where a continuous section was exposed of red sandstones and marls, with a few dykes of igneous rock. The succession of the volcanic rocks of Calton Hill closely resembles that of Arthur's Seat. At the base there is a series of basaltic lavas and tuffs which are overlaid by porphyrites forming the higher part of the hill. To the E they are rapidly succeeded by black shales and sandstones (division 3) occurring in the gardens of Royal Terrace, while on the NW slope of the hill they are abruptly cut off by the great fault already described.

The strata of the upper division differ from the red sandstones in lithological character, and particularly in the greater abundance of fossils. Within the present area, the prominent members of the Cementstone Series are the white sandstones of Granton and Craigleith, and the Wardie shales. Beyond the limits of the Edinburgh district, it comprises the well-known oil shales of Midlothian and the Burdiehouse Limestone which has become celebrated for the great abundance of ichthyolites and crustace

ID
732
Location Coordinates
POINT (-3.21572 55.93549)

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