How to use Marls in a sentence
The best soils are in the west section, where limestone clays or shell marls are common.
Laornis from the Cretaceous marls of New Jersey was as large as a swan.
In this part of its course the rocky sides of the valley, which sometimes closely approach the river, are composed of marls and gypsum, with occasional selenite, overlaid with sandstone, with a topping of breccia or conglomerate, and rise at places to a height of 200 ft.
The sulphur occurs in Miocene marls and limestone, associated with.
The latest Cretaceous is the Ripley formation, which lies west of the northern part of the last-named, and, about Scooba, in a small strip, the most southerly of the Cretaceous - it is composed of coarse sandstones, hard crystalline white limestones, clays, sands, phosphatic greensands, and darkcoloured, micaceous, glauconitic marls; its greatest thickness is about 280 ft.Advertisement
The Jackson formation south-west of the Lisbon beds, is made up chiefly of grey calcareous clay marls, bluish lignitic clays, green-sand and grey siliceous sands.
Basilosaurus (or Zeuglodon) bones are found only in the Jackson marls, and other marine fossils are abundant.
The intervening depression, which seems to be bounded on the west by a fault, is filled to a large extent by sandstones and marls of Eocene age.
Another well-known bed, formerly known as the "Bristol" or "Lias" Bone Bed, exists in the form of several thin layers of micaceous sandstone, with the remains of fish and saurians, which occur in the Rhaetic Black Paper Shales that lie above the Keuper marls in the south-west of England.
They yield valuable coals, clays, marls and ganister.Advertisement
Most of the southern part of the county is occupied by Keuper marls and sandstones, the latter yield good building stone; and at Chellaston the gypsum beds in the former are excavated on a large scale.
Towards the Caspian, especially between Petrovsk and the river Sulak, the Cretaceous system is well represented, and upon its rocks rest marls, shales, and sandstones of the Eocene period.
The .great mass of the Gilead range is formed of Jura limestone, the base slopes being sandstone partly covered by white marls.
Old Red Sandstone, red grits, sandstones and marls and conglomerate occur in a narrow belt on the east side of Mainland from Sumburgh Head to Rova Head, north of Lerwick; they also form the island of Bressay.
These do not occur on the west coast, but on the east coast the German expedition discovered marls and sandstones on Kuhn Island, resembling those of the Russian Jurassic, characterized by the presence of the genus Aucella, Olcostephanus Payeri, 0.Advertisement
On the south coast of the same island are coarse-grained, brownish micaceous and light-coloured calcareous sandstone and marls, containing fossils, which render it probable that they are of the same age as the coal-bearing Jurassic rocks of Brora (Scotland) and the Middle Dogger of Yorkshire.
Some of the chalk marls, which are usually of a yellowish or dirty grey colour, contain clay and 50 to 80% of carbonate of lime with a certain proportion of phosphate of lime.
The beneficial effects of marls may also be partially due to the presence in them of available potash.
Many other kinds of marls are described; some are of a sandy nature, others stony or full of the remains of small shells.
Even stiff soils deficient in lime are greatly improved in fertility by the addition of marls.Advertisement
Permeability is practically identical with the speed at which percolation takes place; through clay it is slow, but increases in rapidity through marls, loams, limestones, chalks, coarse gravels and fine sands, reaching a maximum in soil saturated with moisture.
Jukes-Browne and Harrison ascribe the Scotland beds to the Eocene or Oligocene period, the Oceanic series to the Miocene, the Bissex Hill marls to the Pliocene, and the coral limestones partly to the Pliocene and partly to the Pleistocene.
The greater part of Tunisia is composed of sandstones, marls and loosely stratified deposits belonging to the Pliocene and Quaternary periods.
The oldest strata, consisting of gypsiferous marls, are referred to the Muschelkalk and show an alternation of lagoon with marine conditions.
Lower Cretaceous rocks, consisting of thick limestones, shales and marls, occur in Central Tunisia.Advertisement
Limestones and marls represent the stages Cenomanian to Upper Senonian.
The Middle Eocene is characterized by the presence of Ostrea bogharensis and the Upper Eocene by highly fossiliferous sandstones and marls.
Cretaceous marls and limestones appear at intervals, extending in places to the edge of the upper plateau, and are extensively developed on the Makonde plateau.
Geologically the region is made up of Carboniferous limestones, clay slates and sandstones, containing anthracite and coal; of Cretaceous marls, chalk, sandstone and greensands - chalk cliffs, in fact, accompany the Don for 200 m.; and of Miocene limestones and clays.
Among the rocks of economic importance may be mentioned granite of numerous kinds, syenite, serpentine, porphyry, marble, sandstones and marls.Advertisement
Below it, Triassic beds are exposed from Lisburn to Island Magee, giving sections of red sands and marls.
The gypsiferous and saliferous marls of Shellata, Suk Ahras and Ain Nussi have yielded Triassic fossils.
The highest beds, consisting of quartzites, shales, marls and sandstones with the remains of fucoids, are found in the Jurjura and Shellata.
The Oligocene period consists of a marine phase confined to the littoral zone of Kabylia, and of a continental phase occupying vast areas composed of lacustrine, alluvial, gypsiferous marls, sandstones and conglomerates.
To the Pliocene period the marine deposits of the Sahel of Algiers and of the Sahel Jijelli must be attributed; also the lacustrine marls and limestone of the basin of Constantine, and the ancient alluviums of the basins and depressions which bear no relation to the existing valleys.Advertisement
The Jurassic beds are marls, sandstones and limestones, which contain marine fossils.
The greater part of Bechuanaland is covered with superficial deposits consisting of the sands of the desert regions of the Kalahari and the alluvium and saliferous marls of the Okavango basin.
They consist largely of limestone; but marls and sandstones are by no means rare, and there are considerable gaps in the succession indicating that the region was not continuously beneath the sea.
Manly soils are those which contain a considerable percentage (10-20) of lime, and are called clay marls, loamy marls and sandy marls, according as these several ingredients preponderate.
The clay marls are, like clay soils, too stiff for garden purposes until well worked and heavily manured; but loamy marls are fertile and well suited to fruit trees, and sandy marls are adapted for producing early crops.Advertisement
The stratified rocks of this system include marine limestones, shales and sandstones; estuarine, lagoonal and fresh-water shales, sandstones and marls with beds of coal, oil-bearing rocks, gypsum and salt.
The so-called " unproductive " or barren strata, that is, those without workable coals, are not always limestones; quite as often they are shales, red sandstones and red marls.
They consist of breccias, conglomerates, sandstones, marls, and limestones, with seams of coal and lignite.
The Miocene consists chiefly of marls, with occasional beds of lignite and limestone.
The Eocene, consisting chiefly of sands and marls, occupies the whole of the west of the country.Advertisement
Not stopping to reflect that in the angry and suspicious state of men's minds he was sure to lose as much in one direction as he would gain in the other, Justinian entered into the idea, and put forth an edict exposing and denouncing the errors contained in the writings of Theodore generally, in the treatise of Theodoret against Cyril of Alexandria, and in a letter of Bishop Ibas (a letter whose authenticity was doubted, but which passed under his name) to the Persian bishop Marls.
Such casts are not infrequent in the Keuper marls and sandstones, and in the Purbeck beds of England.
The beds are reached by sinking through the clays and variegated marls typical of this formation.
The remainder and greater part of the county is occupied chiefly by the gently inclined Old Red Sandstone; in the dissected plateau of the Black Mountains north of Crickhowell the lower marls and cornstones are laid open, while south of Brecon the conglomeratic upper beds form the escarpment and plateaus of the Beacons.
Crystalline rocks crop out at several capes; Cretaceous limestones, containing an abundant and specific fauna of gigantic ammonites, occur at Dui on the west coast, and Tertiary conglomerates, sandstones, marls and clays, folded by subsequent upheavals, in many parts of the island.Advertisement
Fars series; marls, clays and sand stones with limestones and inter bedded strata of rock gypsum.
Extremely valuable and varied marls, kaolins and clays, fuller's earth, asphaltum and mineral waters show special promise in the state's industry.
The Triassic rocks are arranged in two groups, a lower, composed of conglomerates and sandstones, and an upper one consisting of red and mottled shales and marls with thin sandstones and nodular limestones.
They consist for the most part of marls with Orbitolina concava, and are referred to the Cenomanian.
The Tertiary system includes conglomerates, sandstones, limestones and marls, which appear to be of Eocene, Oligocene and Miocene age.
The shores of the Bosporus are composed in the northern portion of different volcanic rocks, such as dolerite, granite and trachyte; but along the remaining course of the channel the prevailing formations are Devonian, consisting of sandstones, marls, quartzose conglomerates, and calcareous deposits of various kinds.
The Oligocene consists of grey and white marls (known as the Idalian series), which are distributed all over the island and attain their greatest development on the south side of the Troodos.
The deposits are marls, sandstones and limestones, and were evidently formed near the shore-line.
More recent clay-slates and marls belonging to the middle Jurassic occur in the western coast-region about Matochkin Shar.
The eastern ranges of the Bolivian Andes are formed of Palaeozoic rocks with granitic and other intrusions; the Western Cordillera consists chiefly of Jurassic and Cretaceous beds, together with the lavas and ashes of the great volcanoes; while the intervening plateau is covered by freshwater and terrestrial deposits through which rise ridges of Palaeozoic rock and of a series of red sandstones and gypsiferous marls of somewhat uncertain age (probably, in part at least, Cretaceous).
The Palaeozoic beds are directly overlaid by a series of red sandstones and gypsiferous marls, similar to the formacion petrolifera of Argentina and Brazil.
The mining of natural fertilizers - white and greensand marls - is a long established industry; the output in 1907 was 14,091 tons, valued at $8429.
The plain sweeps round south of the Lancashire coal-field, forms the valley of the Mersey from Stockport to the sea, and farther south in Cheshire the salt-bearing beds of the Keuper marls give rise to a characteristic industry.
The " Waterstones," or Lower Keuper Sandstones, - forming gentle elevations above the softer marls, and usually charged with an abundant supply of water, which can be reached by wells, - form the site of many towns, such as Birmingham, Warwick and Lichfield, and of very numerous villages.
Each group is made up of an alternation of soft marls or clays and hard limestones or sandstones.
The Triassic rocks, red sandstones, marls and conglomerates cover a broad area in the Midlands in Worcestershire, Warwickshire and Leicestershire, whence they may be followed south-westward through Somerset to the coast at Sidmouth, and northward, round either flank of the Pennine Hills, through Nottinghamshire and Yorkshire to Middlesbrough on the one hand, and upon the other through Staffordshire, Cheshire and Lancashire to Carlisle.
The low Cordilleras of the Chocos, on the west coast, are covered by soft Quaternary sandstones and marls containing shells of extant species, such as still inhabit the neighbouring ocean.
With the exception of the Red Marls forming the upper part of the Keuper, most of the New Red Sandstone is permeable, and some parts contain, when saturated, even more water than solid chalk; but, just as in the case of the chalk, a well or borehole in the sandstone yields very little water unless it strikes a fissure; hence, in New Red Sandstone, also, it is a common thing to form underground chambers or adits in search of additional fissures, and sometimes to sink many vertical boreholes with the same object in view.
Marls adapted to the manufacture of Portland cement are found along the Ohio river, and in the lake region in the north.
In some places limestones appear as projections from the range; at others conglomerates and Tertiary clay marls form the outermost fold."' On the north versant of the ranges the rainfall increases from the foot of the mountains upwards, and at woo-10,000 ft.
The Triassic sandstones and marls, with marine Rhaetic beds above, are preserved mainly round the basaltic plateaus of the north-east, and extend for some distance into county Down.
The lowest is the Triassic Keuper found in the Isle of Axholme and the valley of the Trent in the form of marls, sandstone and gypsum.
It is composed of red and variegated sandstones, dolomites and marls, traversed in some places by ophitic rocks, and containing deposits of gypsum, aragonite and rocksalt, It thus resembles the Trias of England and Germany.
The marine Tertiary accumulations commence with those that are referable to the Eocene series, consisting of nummulitic limestones, marls and siliceous sandstones.
They have left behind them thick deposits of clays, marls, gypsum and limestone, in which numerous remains of the land-animals of the time have been preserved.
They contain much clay and marls, non-absorbent and subject to such excessive wash that vegetation cannot gain a foothold.
The white clay marls of Camorta and Nancowry have become famous as being true polycistinan marls like those of Barbados.
The plant-bearing marls of Gelinden, near Liege, contain the debris of a Paleocene forest.
Some of them contain much iron (yellow, blue and red clays); others contain abundant calcium carbonate (calcareous clays and marls).
The Eocene includes a series of sandstones and marls with lignite, and these are overlaid by nummulite limestones.
The rocks here are red marls, with bands of the mineral gypsum.
The Upper Coal Measures outcrop between Halesowen and West Bromwich and largely comprise marls, red sandy mudstones and grits.
Upto 6 basaltic dikes intrude into these Triassic marls and mudstones.
The lower and middle divisions of the Jurassic, composed of massive limestones more or less siliceous and overlain by the marls amd highly fossiliferous limestones of the Upper Lias, play an important part in the constitution of the chief mountains of the Tell.
The Karroo system (sandstones and marls) covers immense areas (see Africa, § Geology).
The lower Black Ven Marls of the nearer cliff face are covered by the talus slope of slipped material.