Marsh, who, after 1870, discovered a great number of bird remains in the Cretaceous strata of North America.
Its congeners even then lived in England, as is proved by the fact that their relics have been found in the Stonesfield oolitic rocks, the deposition of which is separated from that which gave rise to the Paris Tertiary strata by an abyss of past time which we cannot venture to express even in thousands of years.
A region where volcanic activity has led to the embedding of dykes or bosses of hard rock amongst softer strata produces a plain broken by abrupt and isolated eminences.'
The successive " Minoan " strata, which go well back into the fourth millennium B.C., reach down to a depth of about 17 ft.
There were, moreover, other and broader oscillations which raised or lowered extensive areas withbut much crumpling of the strata, and to these are due some of the most important breaks in the geological series.
The bone-bed of Axmouth in Devonshire and Westbury and Aust in Gloucestershire, in the Penarth or Rhaetic series of strata, contains the scales, teeth and bones of saurians and fishes, together with abundance of coprolites; but neither there nor at Lyme Regis is there a sufficient quantity of phosphatic material to render the working of it for agricultural purposes remunerative.
Over the greater part of the Cambrian country the strata are still nearly as flat as when they were first laid down, and the deposits, even of the Cambrian period, are as soft as those of the Mesozoic and Tertiary formations in England.
The mountains are composed in great part of Paleozoic strata, often modified by vulcanism and greatly denuded and sculptured by wind and water erosion.
The strata here show some traces of the upheaval which formed the Appalachian Mountain chain.
There are four formations of Cretaceous strata in Mississippi, defined by lines having the same general direction as the one just described.
Seven formations (or groups) of the Tertiary strata have been distinguished in Mississippi.
It is, indeed, as if the high land of central Asia had been pushed southward against and over the unyielding mass formed by the old rocks of the Indian peninsula, and in the process the edges of the over-riding strata had been crumpled and folded.
The great summer heat, by expanding the air upwards, disturbs the level of the planes of equal pressure, and causes an outflow of the upper strata from the heated area.
Schliemann got to work again at Hissarlik in 1878, and greatly increased our knowledge of the lower strata, but did not recognize the Aegean remains in his "Lydian" city of the sixth stratum, which were not to be fully revealed till Dr W.
In the Carboniferous strata (Coal measures) remains of Hexapods become numerous and quite indisputable.
Bitumen is, in its various forms, one of the most widel y -distributed of substances, occurring in strata of every geological age, from the lowest Archean rocks to those now in process of deposition, and in greater or less quantity throughout both hemispheres, from Spitzbergen to New Zealand, and from California to Japan.
The main supplies have been obtained from strata unbroken and comparatively undisturbed, but the occurrence of anticlinal or terrace structure, however slightly marked or limited in extent, exerts a powerful influence on the creation of reservoirs of petroleum.
As early as 1804, Humboldt expressed the opinion that petroleum was produced by distillation from deep-seated strata, and Karl Reichenbach in 1834, suggested that it was derived from the action of heat on the turpentine of pine-trees, whilst Brunet, in 1838, adumbrated a similar theory of origin on the ground of certain laboratory experiments.
As the water is shut off before the portion of the well below the water-bearing strata is bored the remainder of the drilling is conducted with only sufficient water in the well to admit of sand-pumping.
Principal strata bored through, the Canadian method of drilling differs from the Pennsylvanian or American system in the following particulars: 1.
In the lower strata were discovered the remnants of Cyclopean or prehistoric architecture already mentioned.
Two methods are employed to attain this: the first distinguishes the strata or layers by colours; the second indicates the varying slopes by shades or hachures.
At the present time compilers of strata maps generally limit themselves to two or three colours, in various shades, with green for the lowlands, brown for the hills and blue for the sea.
If contoured maps are available it is easy to build up a strata-relief, which facilitates the completion of the relief so that it shall be a fair representation of nature, which the strata-relief cannot claim to be.
To i in., in two editions, both printed in colour, the one with hills stippled in brown, the other coloured on the " layer system " as a strata-relief map; a map of the United Kingdom on a scale of 4 m.
To mountain-climbers these contour maps are invaluable, but for ordinary purposes " strata maps," such as J.
It still lived on, however, in the lower strata of Christian society; and in certain undercurrents of tradition it was transmitted from century to .century.
Strata of volcanic rock subjacent to the city and its environs, and constructed originally for the interment of the Christian dead.
The igneous formation of which the greater part of the Roman Campagna is, in its superior portion, composed, contains three strata known under the common name of tufa, - the " stony," " granular," and " sandy " tufa, - the last being commonly known as pozzolana.
In the south-east of Bosnia the predominant formations are Triassic and Palaeozoic strata with red sandstone and quartzite.
The steep icewalls at the margin of the inland ice show, especially where the motion of the ice is slow, a distinct striation, which indicates the strata of annual precipitation with the intervening thin seams of dust (Nordenskidld's kryokonite).
The principal folding took place at the close of the Carboniferous period, and was contemporaneous with that of the old Hercynian chain of Belgium, &c. The Permian and later beds lie unconformably upon the denuded folds, and in the space between the Montagne Noire and the Cevennes proper the folded belt is buried beneath the horizontal Jurassic strata of the Causses.
Undue stress is often laid on the fact that Lingula has come down to us apparently unchanged since Cambrian times, whilst Crania, and forms very closely resembling Discina and Rhynchonella, are found from the Ordovician strata onwards.
As a teacher he was one of the first to discriminate between the various strata in rabbinic records; to him was due the revival of interest in the older Midrash and in the Palestinian Talmud, interest in which had been weak for some centuries before his time.
Beds of this age, consisting of sandstones and coal, are found on the northern coast of Disco Island and the southern side of the Noursoak Peninsula, the beds in the former locality, " the Kome strata " of Nordenskiold, being the oldest.
In thickness, occupying undulating hollows in the underlying gneiss, and dip towards the Noursoak Peninsula at 20°, when the overlying Atanakerdluk strata come in.
Still, the presence of dicotyledonous leaves, such as Magnolia alternans, in the Atanakerdluk strata, proves their close alliance with the Dakota series of the United States.
They are characterized by fine cycads (Zamites arcticus and Glossozamites Hoheneggeri), which also occur in the Urgonian strata of Wernsdorff.
These Miocene strata have not been found farther north on the Greenland shore than the region mentioned; but in Lady Franklin Bay, on the Grinnell Land side of Smith Sound, they again appear, so that the chances are they will be found on the opposite coast, though doubtless the great disintegration Greenland has undergone and is undergoing has destroyed many of the softer beds of fossiliferous rocks.
It is true that a catacomb is often connected with the earlier sand-quarry, and starts from it as a commencement, but the two are excavated in different strata, suitable to their respective purposes, and their plan and construction are so completely unlike as to render any confusion between them impossible.
16) from Marchi's work, when compared with that of the catacomb of Sant' Agnese already given, presents 1 In Rome the three strata are known to geologists as tufa litoide, tufa granolare and pozzolana.
Penck on a scale of 1: i,000,000, which has been undertaken by the leading governments of the world, the ground is shown by contours at intervals of ioo metres (to be increased to 200 and Soo metres in mountainous districts); the strata are in graded tints, viz.