In the Diester and Teutoberger Wald, and in the region of Halberstadt, the clays and marls are replaced by sandstones, the so-called Gault-Quader.
The lithological characters of deposits formed under these conditions naturally vary greatly, consisting of different kinds of mechanical sediments occasionally mixed with thin freshwater marls and limestones.
The deposits vary in coarseness, like those of modern alluvial flats, from the coarse gravels of the river-beds to the fine loams andmarls of the flood-plains.
The isolated Permian deposits of the midland and southern counties of England consist of red marls and sandstones with occasional breccias, and in the absence of fossils, their exact position in the Permian series is still unknown.
The marls contain, besides the freshwater Limnaea and Unio, such forms as Meretrix, Ostrea and Melanopsis.
It is built on the red rock and marls of the Middle Lias.
They are in the main terraces of drainage, the step-like form of subsidence being due to the composition of the seleniferous marls and under waste.
Triassic clays= are of great importance in the Midlands, those upper portions of them known as the Keuper Marls being much used for the manufacture of bricks.
These are the 'true marls' or 'malms' composed of clay and chalk and must not be confused with the so-called marls of Staffordshire and elsewhere which are almost free from lime compounds.
Limestone occurs in many marls and to a smaller extent in other clays.
The waste from the crystallines is spread out as a series of gravels, sands and marls on the baselevelled Triassic area.
With regard to themarls of Gergovia and Merdogne, near Clermont, I think they ought rather to be classed in the Miocene epoch; but this question can be settled only by a more attentive determination of the species.
The lower and most westerly situated members of the younger rocks is a series of breccias, conglomerates, sandstones and marls which are probably of lower Bunter age, but by some geologists have been classed as Permian.
Black phosphates are worked in central Tennessee, and in England themarls of the "Old Red" are employed for brick-making.
These are succeeded by the Keuper marls and sandstones, well exposed at Sidmouth, where the upper Greensand plateau is clearly seen to overlie them.
Beneath the thick nummulitic Eocene limestone of the Salt Range are shales and marls with a few coal seams.
The most important feature is the great development of nummulitic limestone with thin marls and nummulitic sandstones.
Here there are alternating beds, a few inches thick, of coarse and fine tufaceous sandstones, sometimes calcareous, with marls or calcareous clays.
The deposit belongs to the group of palagonite marls described on page 335.
The rest of the county is almost equally divided between the red Keuper Marls of the Trias on the west and the grey limestones and shales of the Lias on the east.
In the south-east corner of the county, by Darlington, Stockton and Seaton Carew, the low ground is made of Triassic rocks, red marls and sandstones with beds of gypsum and rock salt.
The sandstones and marls seen between the magnesian limestone and the Coal Measures at South Shields, Newbottle and several miles farther south are usually classed as Permian, but they may possibly prove to belong to the lower series.
They seem to be for the most part made up of marls and limestones, with trap-dykes and other igneous matters here and there.
Above the volcanic series more red sandstones, conglomerates and marls appear.
The plain of Kinross is occupied by the soft sandstones, marls and conglomerates of the upper Old Red Sandstone, which rest unconformably upon the lower division with a strong dip.
Clays and marls with occasional limestones and sandstones represent the Kimeridgien of most of northern Europe, including Russia.
To these conglomerates succeed argillaceous and calcareousmarls and limestones, containing Lower Miocene shells and bones of mammalia, the higher beds of which sometimes alternate with volcanic tuff of contemporaneous origin.
The lower fresh-water and estuary marls contain Melania costata, Sowerby, Melanopsis, etc.
Next below are fresh-water and estuary marls and carbonaceous clays in the brackish-water portion of which are found abundantly Cerithium plicatum, Lam.
The Oeningen strata consist of a series of marls and limestones, many of them thinly laminated, and which appear to have slowly accumulated in a lake probably fed by springs holding carbonate of lime in solution.
The gypsum, with its associated marls before described, is in greatest force towards the centre of the basin, where the calcaire grossier and calcaire silicieux are less fully developed.
Falconer and Sir Proby Cautley, continued for fifteen years, for the discovery in these marls and sandstones of a great variety of fossil mammalia and reptiles, together with many fresh-water shells.
Between San Caterina and Castrogiovanni, in Sicily, bent and undulating gypseousmarls occur, with here and there thin beds of solid gypsum interstratified.
The thickness of the marls is ten feet, and vegetable matter predominates so much in some layers as to form an imperfect lignite.
It is associated with marls and other deposits, such as may have been formed in marshes and shallow lakes in the newest part of a great delta.
Stoddart showed that many plants growing on Keuper marls containing celestine near Bristol appropriated the strontium salt, and the metal could be detected spectroscopically in their ashes.
The Eocene includes a series of sandstones and marls with lignite, and these are overlaid by nummulite limestones.
Cases however occur, where the salt springs are not accompanied by rock salt, and where the whole saline matter is derived from the marls themselves, which thus constitute the only saliferous beds.
According to the predominance of one or other of these three main ingredients, marls may be distributed into calcareous, clayey, and sandy.
Sometimes the rock salt is disseminated in small masses or little veins among the calcareous and argillaceous marls which accompany or overlie the greater deposits.
Fortunately, however, England is well off in the matter of pise soils, the red marls being amongst the very best.
It should be remarked that none of the samples tested were made from really good Pise soil, such for instance as the red marls or brick earths.
Second only to the red marls come the brick earths, which, fortunately, are also widely distributed.
Usually it consists of sand, gravel, rolled pebbles, marls or clays.
Some Virginia marls contain as high as seventy-five or eighty per cent.
Some of the Virginia marls range as high as seventy and eighty per cent.
Of all the forms of lime, that supplied by the marls of the seaboard section appears to be the best.
Each group is made up of an alternation of soft marlsor clays and hard limestones or sandstones.
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.
Devon are the Devonian limestones, grits and shales; the corresponding Old Red Sandstone type of the system (marls and sandstones) being exposed over a large part of Herefordshire, stretching also into Shropshire and Monmouth.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "marls" in a variety of sentences. We hope that you will now be able to make sentences using this word.
