The soil, of decomposed basalt, is wonderfully fertile.
Large areas are overlain with trachyte, basalt, obsidian, tuff and pumice.
Such rocks as basalt, diorite and trachyte are comparatively rare.
In most cases the eruptions appear to be of Pliocene or later date, but in the extreme north some of the basalt seems to belong to the Miocene period.
Rocks belonging to the Cretaceous system at one time covered considerable areas on both sides of the Highlands, but they have been entirely stripped off the eastern side, while on the western they have been reduced to a few fragmentary patches, which have survived because of the overlying sheets of basalt that have protected them.
Where lava has been piled up in successive nearly horizontal sheets, with occasional layers of tuff or other softer rock between them, it offers conditions peculiarly favourable for the formation of escarpments, as in the wide basalt plateaus of the Inner Hebrides.
These rocks form a prominent feature underneath the basalt terraces of the east side of Skye, Raasay and Eigg.
The church of Preshute, largely rebuilt, but preserving its Norman pillars, has a curious piscina, and a black basalt font of great size dating from 1100-1150, in which according to a very old tradition King John was baptized.
In the Miocene period andesites of various kinds were erupted, while at the close of the Pliocene began the great eruptions of basalt which reached their maximum in Quaternary times and continue to the present day.'
The bulk of the mountain consists of andesite, but porphyry, obsidian, trachyte, basalt, and.
It is formed of basalt, trachyte and phonolite, and the soil is very fertile.
Thousands of feet of basalt have been worn away from many parts of its surface; deep and wide valleys have been carved out of it; and so enormously has it been wasted, that it has been almost entirely stripped from wide tracts which it formerly covered and where only scattered outliers remain to prove that it once existed.
Their existence under the basalt outlier of Ben Iadain in Morven, at a height of 1600 ft.
The university, founded in 1869, built mainly of basalt, has schools of arts, medicine, chemistry and mineralogy.
Is perhaps the fine spring north of the village, a shallow pool of good water full of small fish, rising between black basalt boulders: or more probably the copious `Ain Jalud.
These are modified forms of basic rocks such as basalt, dolerite and diabase.
Jebel Hauran, east of the Jordan, is capped by a great sheet of basalt; and many other basalt flows are found, especially in the country north of Lebanon.
It is a basalt stele inscribed in hieroglyphic, demotic and Greek with a decree of the priests assembled at Memphis in favour of Ptolemy V.
In later days, in the time of the Sargonid kings of Akkad or the monarchs of Ur, stones such is granite, basalt, diorite and dolerite were probably brought from the Sinaitic peninsula, if not from the western desert of Egypt, if the Red Sea coast is to be identified, as seems very probable, with Magan, " the place to which ships went," the land whence the Babylonians got some of their first stones for sculpture and architecture.
The objects found in these researches are in the museum, the most notable being a great basalt bull, probably once an object of cult in the Serapeum.
Besides huge masses of old schists and sandstones, the range contains extensive limestone, marble, diorite, basalt and porphyry formations, while granite prevails on its southern slopes.
These beds, as well as the Cretaceous series, from which they are as yet only imperfectly distinguished, are associated with sheets of basalt, which penetrate them in great dikes, and in some places, owing to the wearing away of the softer sedimentary rocks, stand out in long walls running across the beds.
This iron is considered by several of the first authorities"on the subject to be of meteoric origin,' but no evidence hitherto given seems to prove decisively that it cannot be telluric. That the nodules found were lying on gneissic rock, with no basaltic rocks in the neighbourhood, does not prove that the iron may not originate from basalt, for the nodules may have been transported by the glaciers, like other erratic blocks, and will stand erosion much longer than the basalt, which may long ago have disappeared.
This iron seems, however, in several respects to be unlike the celebrated large nodules of iron found by Nordenskiold at Ovifak, but appears to resemble much more closely the softer kind of iron nodules found by Steenstrup in the basalt;' it stands exposure to the air equally well, and has similar Widmannstaten figures very sharp, as is to be expected in such a large mass.
Nigdeh; basalt drum or altar with incised inscription.
Inscribed basalt bowl found at Babylon) and fragments of ware painted with dark ornament on light body-clay, or in polychrome on a cream-white slip, or black burnished, found on N.
In alluvial deposits the richest ground is usually found in contact with the "bed rock"; and, when the overlying cover of gravel is very thick, or, as sometimes happens, when the older gravel is covered with a flow of basalt, regular mining by shafts and levels, as in what are known as tunnel-claims, may be required to reach the auriferous ground.
The hills west of the town consist of horizontal strata of sandstone covered with irregular pieces of basalt and the top of the hill on which the observatory stood was made level by taking away the basalt.
The Nile at the Ripon Falls leaps over a basalt dike.
The rocks on the verge of the Kisumu province of East Africa are mainly volcanic (basalt, tuff, lava, kenyte).
13, Plate I I., the sequence of the basalt, shale and melaphyre is clearly visible on the sides of the pit; and fig.
The islands are volcanic, the main geological formation being Tertiary or Jurassic basalt, which occasionally protrudes through the ice-cap in high isolated blocks near the shore.
The Saitic heads in basalt show a school of close observation, with fair power of rendering the personal character; and even in Roman times there still were provincial artists who could model a face very truthfully, as is shown in one case in.
These are worked in brown basalt, syenite, porphyry, alabaster and limestone.
The materials are quartz crystal, basalt, porphyry, syenite, granite, volcanic ash, various metamorphics, serpentine, slate, dolomite marble, alabaster, many colored marbles, saccharine marble, grey and white limestones.
A hard and fine-grained quartzite sandstone was quarried at Jebel Ahmar behind Heliopolis, and basalt was found thence along the eastern edge of the Delta to near the Wadi Tumilat.
Cretaceous rocks occur around the basalt platform of the Cameroon mountain and generally along the coastal belt.
Basalt and tuff, probably of Tertiary age, form the great mass of the Cameroon mountain, also the island of Fernando Po.
The hamlet of Aremberg is at the foot of a basalt hill 2067 ft.
In the Siebengebirge the little crater of Roderberg, with its lavas and scoriae of leucite-basalt, is posterior to some of the Pleistocene river deposits.
Figure 9, Plate I., shows the top of the De Beers' crater with basalt overlying the shale.
In both occurrences, however, there is still the possibility that the eclogite or the basalt is not the original matrix, but may have caught up the already formed diamond from some other matrix.