The oldest rocks exposed are gneiss, talc-schist and serpentine, with intrusive masses of gabbro and diabase.
He jumped to his feet flipping light switches and stumbling through both rooms, barely seeing still-sleeping Cynthia through eyes pinched nearly closed against the intrusive brightness.
Assume first, however, that there is no uplift from intrusive water.
All over Iceland, in both the basalt and breccia formations, there occur small intrusive beds and dikes of liparite, and as this rock is of a lighter colour than the basalt, it is visible from a distance.
It is penetrated by far younger intrusive masses at Slieve Gullion and Forkill.
1.53-85, with 3 maps and 3 plates; bibliography, p. 85), which shows that the axis of the territory is a high range, composed of slates and schists of undetermined age, with intrusive plutonic rocks.
By reason of the constantly changing temperatures and the frequent filling and emptying of the reservoir, expansion and contraction, which are always at work tending to produce relative movements wherever one portion of a structure is weaker than another, must have assisted the water-pressure in the extension of the horizontal cracks, which, growing slowly during the fifteen years, provided at last the area required to enable the intrusive water to overbalance the little remaining stability of the dam.
There was no confiscation of lands for the benefit of intrusive Danish settlers.
Dean had used a less intrusive pad and pencil with Cynthia Byrne.
Volcanic rocks, locally called "Toadstone," are represented in the limestones by intrusive sills and flows of dolerite and by necks of agglomerate, notably near Tideswell, Millersdale and Matlock.
Practically all the remaining area in these islands is occupied by metamorphic schists and gneisses which occur in great variety and with which are associated numerous dikes and masses of intrusive igneous rock.
The oldest rocks consist of granite and schist, penetrated by intrusive dykes, and upon this foundation rest the flat-lying sedimentary deposits, beginning with a sandstone like the Nubian sandstone of Egypt.
Fair Head is formed of intrusive dolerite, presenting a superb columnar seaward face.
Brixianus (f) of the 6th century would be added if it were not probable that it is merely a Vulgate MS. with intrusive elements.
" I have no veneration," he said to the royal commissioners in St Andrews, before either the voluntary or the non-intrusive controversies had arisen, " for the Church of Scotland qua an establishment, but I have the utmost veneration for it qua an instrument of Christian good."
In the north-western Highlands masses of white quartzite, resting unconformably in Torridonian sandstone, run from Loch Eriboll to Skye, forming in places great conical hills and some L J Recent & Pleistocene F l Cretaceous Jurassic Trias Granite & Acid Intrusive Rocks' Permian Coal Measures, Carboniferous Millstone Grit Series Lower Carboniferous Old Red Sandstone & Devonian Silurian Ordovician Cambrian Scale, z:4,600.000 English Miles o xxxx xzxx xxxx Metamorphic Group Volcanic Rocks ® Basic Intrusive Rocks 'I +++ +++ ob.o times capping isolated mountains of red Torridon sandstone.
These intrusive masses now tower into conspicuous groups of hills - the Cuillins in Skye, the mountains of Rum and Mull, and the rugged heights of Ardnamurchan.
Geologically the group is composed mainly of Triassic, Cretaceous and Tertiary strata, penetrated by intrusive rocks.
It forms part of an intrusive mass which, on the south and west cliffs of the island, has a columnar arrangement and is traversed by dykes of dolerite, most of which run in a northwest direction.
The sedentary population of the country villages - the fellahin, or agriculturists - is, on the whole, comparatively unmixed; but traces of various intrusive strains assert themselves.
These mountains, consisting of various sorts of gneiss, intrusive granite and gabbro, have been formed partly by faulting but mainly by erosion, the lines of which have been determined by the presence of faults or the presence of relatively soft rocks.
One of the striking features in the geology of Arran is the remarkable series of intrusive igneous rocks of Tertiary age which occupy nearly one-half of the area and form the wildest and grandest scenery in the island.
It is worthy of note that the dykes and sheets of felsite are seldom pierced by the basalt dykes and are probably about the most recent of the intrusive rocks.
Trap appears here and there in intrusive dykes.
Intrusive dikes - locally known as ironstone - by preventing erosion are often the cause of the flat-topped hills which are a common feature of the landscape.
Dykes and intrusive sheets, most of which end at the folded belt, are also numerous.
The age of the intrusive sheets met with in the Beaufort series is usually attributed to the Stormberg period.
Slates, schists, quartzites and limestones form the greater part of the hills, but the Brocken and Victorshohe are masses of intrusive granite, and diabases and diabase tuffs are interstratified with the sedimentary deposits.
The axis along which they have been elevated runs north-east and south-west, and on either flank a series of " green rocks " appears, consisting of altered amygdaloidal andesitic lavas, intrusive dolerites, coarse gabbros and diorites, and at Beagh-beg and Creggan in central Tyrone ancient rhyolitic tuffs.
The earliest signs of igneous activity in Africa are to be found in the granites, intrusive into the older rocks of the Cape peninsula, into those of the Transvaal, and into the gneisses and schists of Central Africa.
The Devonian period, as in Victoria, was marked by a series of granitic intrusions, which altered the older beds on the contact, while the quartz-porphyry dikes, which are intrusive in the Silurian rocks at the Mount Bischoff tin mine, doubtless belong to this period.
Intrusive and volcanic rocks of great variety and of various ages occur.
The tinguaites and solvsbergites of Port C y gnet, south of Hobart, may be of this age; they are intrusive in Carboniferous rocks, and there is no evidence of their precise date; but their resemblance to the rocks associated with the geburite-dacite of Victoria suggests that they may belong to.
Even if the volcanic and intrusive basic rocks prove to be Ordovician (Lower Silurian), which is very doubtful, the metamorphic series of the core is clearly distinct, and appears to be " fundamental " so far as Ireland is concerned.
The red gneisses near Tarr Head probably represent intrusive granite; and this small north-eastern exposure is representative of the Dalradian series which covers so wide a field from central Londonderry to the coast of Donegal.
The oldest rocks in this large area are a stratified series of mica-schists, limestones and quartzites, with numerous intrusive sheets of diorite, the whole having been metamorphosed by pressure, with frequent overfolding.
The foothills and lowlands throughout southern Wicklow and almost the whole of Wexford, and the corresponding country of western Wicklow and eastern Kildare, are thus formed of Silurian beds, in which numerous contemporaneous and also intrusive igneous rocks are intercalated, striking like the chain N.E.
Thus they not only penetrate all cavities in an exceedingly intrusive manner, but exert pressures in all directions, which, owing to the density of the asphalt, are more than 40 greater than would be produced by a corresponding depth of water.
It may do this in virtue of horizontal water-pressure alone, or of such pressure combined with upward pressure from intrusive water at its base or in any higher horizontal plane.
In one of these papers Levy formulated the requirement now generally adopted in France that the vertical pressure at the upstream end of any joint, calculated by the law of uniformly varying stress, should not be less than that of the water pressure at the level of that joint in order to prevent intrusive water getting into the structure.
Recent & Pleistocene Tertiary Cretaceous Jurassic '1111111M ' Granite & Acid Intrusive Rocks Scale,, :6.000.000 English Miles s° .
Old Red Sandstone & Devonian r (Silurian Ordovician Cambrian Metamorphic Group + +J Volcanic Rocks It Basic Intrusive Rocks 'V /1 '