They are interbedded with unfossiliferous sandstones and shales.
Griesbach, basic volcanic rocks are interbedded with the lowest part of the plant-bearing series, and enormous outbursts took place during the Neocomian period.
Interbedded lavas and tuffs are found in the island of Hoy.
Interbedded volcanic rocks, andesites, dacites, diabases, with agglomerates and tuffs constitute an important feature, and attain a thickness of 6000 ft.
Contemporaneous lava flows interbedded with the strata show that volcanic action accompanied the downwarp, and that molten rock was driven upward through fissures in the crust and outspread over the sea floor in sheets of lava.
Interbedded with the Permian strata of the first three countries named are extensive and thick deposits of a peculiar nature which are clearly ancient ground moraines.
These pervious sands, interbedded with the lava, become the aquifers of artesian wells.
Interbedded with the Triassic sandstones are contemporaneous lava beds which were fed from dikes.
Thus banked off from the stream, the outer portions of a flood plain are often ill-drained and swampy, and here vegetal deposits, such as peat, may be interbedded with river silts.
In the Nile delta some eight layers of coarse gravel were found interbedded with river silts, and in the Ganges delta at Calcutta a boring nearly five hundred feet in depth stopped in such a layer.
In other cases interbedded limestones and other sedimentary rocks containing marine fossils prove that at times subsidence has gained on the upbuilding and the delta has been covered with the sea.
This shale, which gave a banded appearance to the cliff, was disposed in strata of about five feet in thickness, and was interbedded with strata of pebbly conglomerate--the common rock of the islet.
Gibraltar is thus seen to be composed of interbedded lavas and pyroclastics, and on the Wedge a similar alternation is several times repeated, a pink agglomerate being exceptionally striking in appearance.
In the outlying ridges to the north, the Mother Range, Crescent Mountain, and the Sluiskin Mountains, the structure seems to be that of interbedded volcanics approximately horizontal.
While the earlier stages of the activity of the volcano were characterized by lava flows of great thickness, by and by explosive products began to appear, and interbedded with the sheets of lava one finds bombs, lapilli, cinders, etc.
Farther up the side of the hill the rock is a quartzite, interbedded with layers of hematite, which in some places forms the larger part of the mass.
This iron ore is coarsely laminated with red siliceous slate, having a thickness of from fifty to one hundred feet, and is interbedded between conglomerate and dolomite.
There is a lacustrine group which has usually been placed in the Lower Eocene, but the discovery of Anthracotherium magnum in the interbedded lignites proves it to be Oligocene, in part at least.
In the north-east part of the county there is a large development of slate with interbedded greywackes and pebbly grits, which occupies the coast section between Macduff and Troup Head except a small part at Gamrie.
The Mexican deposits are of this type, and occur in beds up to 24 feet in thickness interbedded with metamorphosed sandstones.
The deposits occur in thin sedimentary layers interbeddedwith jaspers and ironstones.
The deposits which at present constitute the principal source of domestic borax are not the playa deposits just described, but are masses of colemanite in Tertiary clays and limestones with interbedded basaltic flows.
In others of the Brazilian ores, the manganese was deposited in sedimentary layers interbedded with siliceous "iron formations," and the whole series has subsequently been altered and recrystallized.
All marine strata that are, roughly, within 100 miles of former lands; here are more apt to occur the alternating series of thin and thick-bedded sandstones and limestones interbedded with shale zones.
Thus gypsum beds are found interbedded with shales, sandstones, and limestones, and frequently, but not always, they are associated with salt beds.
Practically all marine formations that are thick and uniform in rock character and that are devoid of interbedded dark shales, thin-bedded dark impure limestones, dark marls, or thin-bedded limy and fossiliferous sandstones.
In the Adirondack Mountains of New York and in the highlands of New Jersey, magnetites are interbedded and infolded with gneisses, granites, and metamorphic limestones.
Satin spar is the most common variety of gypsum present and it commonly occurs in thin bands interbedded with the mudstones and sandstones.
One of the more colorful formations in the park, the Quartermaster is composed primarily of brick-red to vermilion shales which are interbedded with lenses of gray shales, clays, mudstones, and sandstones.
There must have been periodic influxes of silt- and mud-bearing waters entering the ancient Permian sea, for layers of shale and mudstone are interbedded with the gypsum.
Followed along their outcrop such rocks sooner or later become mixed and interbedded with ordinary sedimentary matter.
Thus, the Sidlaws in Forfarshire consist of a series of hard igneous rocks and interbedded sandstones and flags--the outcrops of which form a succession of escarpments with intervening hollows.
Two limestone tongues of the Green River Formation are interbedded with the Tunp, indicating that at least twice there was major expansion of the lake.
There are also interbedded layers of marlstone and limestone.
The Main Body is "light to dark gray carbonaceous sandy to clayey siltstone interbedded with gray, tan, yellow and brown sandstone and conglomerate and carbonaceous to lignitic claystone.
No sharp dividing line is visible, the granite extending along the planes of foliation for such long distances as in places to appear almost interbedded with the schists.
Although volcanic flows were noted interbedded with the desert deposits, these are few in number, insignificant in volume, and belong to the top of the volcanic series.
Paradox Member Salt, gypsum, and anhydrite with interbedded black and brown shale; some limestone.
Unnamed upper member Blue, greenish, and gray fossiliferous limestone interbedded with white, gray, and greenish sandstone and gray to green shale.
These are dark slates and thin-bedded grits with enormous masses of interbedded igneous rocks, lavas and ashes, the product of contemporaneous volcanoes.
The Spearfish formation consists of red to maroon siltstone and sandstone interbedded with mudstone or shale.
The composition differs considerably in detail from one exposure to another, but in general it consists of gray-green shale withinterbedded fine-grained calcareous sandstone.
The upper half of the member consists of dark-gray to gray-green shale with interbedded fine-grained calcareous sandstone that range from less than 1 foot to 6 feet in thickness.
Here the formation is made up of a lower unit consisting of a bed of white massive gypsum 20 feet thick overlain by 14 feet of interbedded white gypsum and dark-maroon mudstone.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "interbedded" in a variety of sentences. We hope that you will now be able to make sentences using this word.
