| Sequence IV includes strata from the base of the bauxitic claystone below Seam 2 of the Heshan Formation to the top of the Dalong Formation. |
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| Offered in five different colours: white, claystone, desert sand, ivory and brown. |
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| To date, five zones of fragmentary clays associated with claystone outcrops have been located. |
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| Mostly enclosed in hard claystone nodules, their preparation is another problem. |
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| It is also evaluating the possibility of mining other materials from the Grande-Vallée claystone deposit using its patented extraction process. |
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| All tyrannosaurid and hadrosaur bones lie horizontally within a 20 cm thick blocky, green claystone with occasional calcitic nodules and vertical to subvertical burrows. |
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| A number of brown or dark-grey mud-stone and claystone beds have also been reported in the Lang Bay area in British Columbia. |
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| Evidently, the claystone was locally squeezed upwards along the lines of minimum resistance forming a diapir. |
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| The Ediacaran, Cambrian, and Lower Ordovician sections are dominated by sandstone, siltstone, and claystone. |
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| At Penobsquis and Cassidy Lake basal evaporates consist of clean halite with minor anhydrite while nearby at Millstream the same interval is represented by claystone. |
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| The pilot hose was completed in approximately six weeks through interbedded layers of sandstone, claystone and shale. |
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| Claystones that are massive and blocky are sometimes called mudstones, but some geologists class as mudstones partly hardened muds that slake when wetted, reserving the term claystone for fully hardened material. |
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| The sequence in the area consists of alternating claystone, siltstone and sandstone. |
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| They contain rare centimeter to decimeter inter-deposits of green claystone as well as small greenish clayey nodules aligned along the schistosity pattern. |
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| Other rock types include siltstone, claystone, conglomerate and mudstone. |
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| In terms of lithology and mineralogy, the Opalinus Clay is a homogeneous claystone formation which was deposited uniformly over large areas of Northern Switzerland. |
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| The claystone of the overlying Lontova Stage is disturbed by numerous slickensides increasing upwards in number. |
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| The raw material, a black palaeozoic bituminous sideritic claystone, comes from the Kounov coal seam, which outcrops in an area about 7 x I kin. |
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| The oldest occurring rocks in the area surrounding the city originate from the Devonian period and include carboniferous sandstone, greywacke, claystone and limestone. |
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| Lenticular goethite-enriched interlayers of conglomerate often occur, in which clasts of siltstone and silty claystone are enclosed into sandy matrix. |
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| The main bedrocks underlying the area are siltstone, claystone, and sandstone with frequent occurrences of rock salt, potash, gypsum, and anhydrite. |
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| Freshly broken surfaces exhibit interstitial matrix that ranges from fine-grained, clean quartz sandstone and siltstone, hematitic claystone and cements. |
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| Typical diffractograms of the claystone revealed kaolinite as the dominant mineral, while illite, dickite, quartz, microcline and zircon were present in subordinate amounts. |
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