A striking geological feature of the county is the number of dolerite and basalt dykes trending in a north-west direction, which are referred to the same period of intrusion.
There is, however, another group of dolerite dykes running east and west near Dunoon and elsewhere, which are cut by the former and are probably of older date.
In the north part of the county, as near Wemyss Bay, the strata are traversed by dykes of dolerite and basalt trending in a north-west direction and probably of Tertiary age.
In various parts of the Ayrshire coalfield the coal-seams are rendered useless by intrusive sheets of dolerite as near Kilmarnock and Dalmellington.
The commonest type of structure in dolerite is the ophitic, which results from the felspar of the rock having crystallized before the augite; the latter mineral forms shapeless masses in which the idiomorphic felspars lie.
The edges of dolerite sills and dikes often contain much dark brown glass, and pass into tachylytes, in which this material preponderates.
The Mourne granite is quarried above Annalong, and an ornamentaldolerite is worked at Rosstrevor.
Material: a grey or a white limestone most usual; tufa and dolerite also used.
The dolerite of Fair Head sends off sheets along the bedding-planes of these carboniferous strata.
Volcanic necks may be recognized at Carrick-a-rede, in the intrusive mass of dolerite at Slemish, at Carnmoney near Belfast, and a few other points.
As the rocks lie in a horizontal position, on most of the islands of the group only the basalts or dolerite are visible.
The basalts are submarine flows which formed the basis of the land upon which grew the vegetation which gave rise to the coals; the effusion of dolerite which covered up the Coal formation was subaerial.
The earliest forerunners of the more recent lavas seem to have been erupted in Jurassic times, in the form of sheets of contemporaneous basalt or dolerite amongst the Antola limestones which are of this period.
Sometimes we seem to see serpentine, sometimes grunstein, and sometimes dolerite and basalt.
The mass assumes at the surface a yellowish crust like dolerite and basalt.
Inland, cañons of night and shoulders of dolerite and plains where nothing grew leading to great level bastions, fortifications that seemed built by rule and plumb line, with the markings of the basalt visible through the clear air.
A propylitic or highly altered dolerite is exposed half-way between Viene and Lea.
They comprise the coarse textured dolerite as well as the vitreous pitchstone and include both scoriaceous and amygdaloidal rocks.
They probably belong to the east and west quartz dolerite dikes which are now referred to late Carboniferous time.
The members of the third group comprise dikes of dolerite or basalt with or without olivine, which have a general east and west trend, and as they intersect the two previous groups they must be of later date.
The dike is 134 feet wide, and consists of a rock which is a compound of feldspar and augite (dolerite of some authors).
A partial duplicate of this inscription on the Behistun Rock is inscribed on a dolerite block discovered by the German excavators at Babylon; it contains many interesting additions.
Thus in the course of the German excavations at Babylon a plate of dolerite measuring about a foot and a half square and bearing an inscription of Adad-nirari the son of Ashur-dan was discovered.
The stele of dolerite is 4 feet 2 inches high, and on the smooth side of it the figure of a Hittite god is depicted, while the reverse contains a Hittite inscription.
A] The dike is 134 feet wide, and consists of a rock which is a compound of felspar and augite (dolerite of some authors).
Dolerite and diorite; components, hornblende and felspar, or augite and felspar in grains.
Some groups of dolerite and trachyte indicate p 258 a certain degree of basaltic fluidity; others, which have been expanded into vast craterless domes, appear to have been only in a softened condition at the time of their elevation.
It is traversed by several mining shafts, which pass through the dolerite into the workable coals below.
The most important of these is a mass of dolerite about two miles and a half in length, which caps the long ridge of Rowley Regis.
To the south-west, not very far from the house, and to the left of the road leading to San Pablo, lies the Llanura de Imuc, a valley of dolerite more than a hundred feet deep.
In the center of the Island is the Susong-Dalaga (maiden's bosom), a dolerite hill with a beautifully formed crest.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "dolerite" in a variety of sentences. We hope that you will now be able to make sentences using this word.
