As the name implies siltstone is composed mostly of silt particles and contains less clay and shale and mudstone. |
|
Lenses incorporate varicoloured tuffaceous cherts intercalated with tuffaccous mudstone and tuff. |
|
The plaque is made from fine grained sandstone, probably derived from a skerry bed in local Mercia mudstone deposits. |
|
The auriferous veins there are usually interbedded sandstone mudstone varieties metamorphosed into greenschist facies. |
|
Bed 4 comprised medium grey fossiliferous mudstone with limonitic ooids and phosphatic nodules. |
|
Here, the Nancy sequence consists of 10 m of greenish-gray, silty mudstone and shale with scattered sideritic nodules. |
|
The bones occur in a dark olive-gray calcareous mudstone layer several decimeters below the thin limestone bed. |
|
This interpretation appears supported by the predominant occurrence of Platystrophia in soft-weathering micrite and calcareous mudstone. |
|
The unit consists of limestone or calcareous mudstone and was deposited in a fully marine environment. |
|
Here, the upper mudstone of the TST is erosively overlain by 3 m of bioturbated, clayey sandstone and mudstone. |
|
The laminated mudstone facies appears to decrease in abundance towards the east. |
|
Under a thin Jurassic conglomerate a Palaeozoic succession of interbedded reddened sandstone, mudstone and basalt was preserved. |
|
The red mudstone horizons preserve extensive pedogenic textures and desiccation cracks indicative of mature palaeosol development. |
|
The upper Gotham Member also comprises thinly interbedded mudstone, siltstone, and fine-grained calcareous sandstone. |
|
Bezys and Risk suggested that the black shales and mudstone facies were the results of a stratified water column with a pycnocline. |
|
These are relatively soft rocks with a distinctive brick red colour and are composed mainly of sandstone and mudstone. |
|
This facies consists of distinctly laminated mudstone, with a minor component of siltstone and very fine-grained sandstone. |
|
North of the Burd Gol zone there is a small area of interbedded marine mudstone and limestone which reportedly contain Carboniferous fossils. |
|
As coccolith content increases the calcareous mudstone passes transitionally to a coccolith limestone. |
|
The matrix varies in composition from black shale to carbonate mudstone and quartzose siltstone. |
|
|
It is represented by the E-Lert Formation of the Ratburi Group, consisting of mudstone, shale, sandstone, and limestone with a few bedded cherts. |
|
The Caister Coal Formation contains a significant proportion of sandstone, with mudstone and coal arranged in cyclical units. |
|
The unit comprises a thinly laminated heterolith of mudstone and fine-grained sandstone. |
|
The sedimentary lenses are composed of limestone, sandstone, siltstone, mudstone, shale, chert and well-bedded calci-turbidite. |
|
Beneath the main White Stone Band there is an interval of mudstone and bituminous mudstone with a further thicker oil shale. |
|
Where found alternating with massive mudstone and thin coal seams, these sands probably formed as sheet-like floodplain deposits. |
|
The Elgee Siltstone consists of massive red siltstone, sandstone and green mudstone. |
|
The mudstone drapes contain very finely comminuted plant debris. |
|
In response to burial in sedimentary basins, clay minerals in mudrock lithologies, including mudstone, shale and slate, undergo diagenetic and low-grade metamorphic reactions. |
|
The Blaine Formation is over 200 m thick, composed of interbedded mudstone, gypsum in beds up to 10 m thick, and has regionally traceable members of limestone and dolomite. |
|
Ghanem et al. referred to the Hammamat Group as molasse-type sediments that consist of polymictic conglomerate, arkose, greywacke, siltstone and minor mudstone. |
|
Black to grey, organic-rich shale and limestone interbedded with red nodular mudstone and shale of the Bloomfield Formation. |
|
Grey massive mudstone beds may also form as a result of rapid deposition by floods or of homogenization resulting from bioturbation by roots or animals. |
|
She led me to the final case, where dendrite crystals sprawled like frost over a mudstone slab. |
|
We scrambled up the mountain and worked all day on the snow-covered slopes exploring the wide, flat terraces of dark shale and reddish-brown mudstone. |
|
The rock was mostly poor quality shale and mudstone leaving a smooth soapy floor underfoot and this continued for a few hundred metres without respite. |
|
The upper contacts are mostly sharp and overlain by interbedded mudstone, dark brown mudstone, laminated mudstone and occasionally fine-grained sandstone. |
|
The fossils are found in siltstone and mudstone under limestone. |
|
Abundant exposure structures in the interlaminated sandstone siltstone and mudstone facies indicate that the cycles are upward shoaling. |
|
It is also evident that mudstone drapes formed during slack water stages at specific periods, whereas fine-sandstone drapes were formed in other periods. |
|
|
At this locality, the two stricklandioid species occur mainly in yellowish green, thin-bedded, calcareous mudstone, associated with other brachiopods and rugose corals. |
|
The bedrock is composed entirely of Pennsylvanian grey and red sandstone, mudstone, and conglomerate. |
|
The predominant rocks in this ecodistrict are non-calcareous Pennsylvanian sandstone, conglomerate, and mudstone that range from grey to red. |
|
Pottery stones consisting of kaolinite, illite, and pyrophyllite occur as alteration products of acidic volcanic rocks, shales, and mudstone. |
|
It has been set into the mudstone of the Coalbrookdale Formation where the graptolite Cyrtograptus lundgreni first appears. |
|
To the north, soft mudstone has been more deeply eroded to form Burrard Inlet. |
|
The Parry and Salisbury units contain fine-textured soils derived from red, slightly calcareous sandstone and mudstone. |
|
Area 2: This area consists of carbonate mudstone and patch reefs deposited on a shelf margin or in a slightly deeper marine environment. |
|
Red mudstone in the south produces fine-textured, compact soils of the Stony Brook and Harcourt Units. |
|
Traps are formed by structural drape resulting from salt solution tectonics or by lateral pinchout of the porous sands to tight mudstone. |
|
Burrows, mudstone clasts and symmetric, wave ripples are locally present. |
|
These fades grade upwards into ammonite-rich, bioturbated, interbedded nodular micrite, oncolitic limestone and mudstone which are interpreted as condensed zone deposits. |
|
Slices incorporate oceanic pelagic and hemipelagic lithologies such as chert, siliceous, calcareous and tuffaceous mudstone, limestone, and siliceous and calcareous shale. |
|
The entire ecodistrict is underlain by Pennsylvanian sedimentary rocks that consist of red, buff, grey and olive green sandstone, interbedded with mudstone and conglomerate. |
|
Near-surface bedrock aquifers, such as fluvial sandstone, are important but their yield and quality are variable due to interbedded marine mudstone and isolated channel sand deposits. |
|
It is thought that mud and sediment from the sea covered the remains and formed mudstone, which prevented or greatly slowed the decomposition of the dead material. |
|
Other rock types include siltstone, claystone, conglomerate and mudstone. |
|
When this CO2 finally reaches the upper part of the zone, further movement will be blocked by a 950m thick layer of impermeable mudstone, or caprock of the formation, forming a natural seal. |
|
The overlying Telychian succession, assigned to the Litohlavy Formation, begins with a thick bed of yellow-green mudstone, barren of graptolites. |
|
On the northern flanks are outcrops of the Buttermere Formation, olistostrome of disrupted sheared mudstone, siltstone and sandstone. |
|
|
Dark mudstone is widely and abundantly distributed in the Nenjiang Formation of the Songliao Basin, NE China. |
|
Analysis by Curiosity revealed the presence of mudstone, a type of rock formed by fine grains of sediment settling out of a column of calm, still water. |
|
This is an olistostrome of disrupted, sheared and folded mudstone, siltstone and sandstone. |
|
This comprises large olistoliths of greywacke sandstone, with interbedded mudstone and siltstone. |
|
The bedrock is composed mainly of Pennsylvanian sedimentary rocks, including grey sandstone, conglomerate, and red mudstone of the Petitcodiac Group. |
|
The ridge is composed of the laminated mudstone and siltstone of the Kirkstile Formation, typical of the Skiddaw group. |
|
The predominant surface rocks are the Kirk Stile Formation, composed of laminated mudstone and siltstone. |
|
This finely bedded material that splits readily into thin layers is called shale, as distinct from mudstone. |
|
This Ordovician rock is composed of laminated mudstone and siltstone with greywacke sandstone. |
|
This is composed of laminated mudstone and siltstone with greywacke sandstone and is of Ordovician age. |
|
The base of the Jacquet River Formation on the northwestern limb of the Jacquet River Syncline is defined by the first appearance of grey, marine, locally fossiliferous mudstone or siltstone. |
|
In Chongqing, strata including incompact soil, sandstone, and mudstone are widespread. |
|
North of Dorchester, a bedrock of grey sandstone and red mudstone has produced strongly acidic, medium-textured loams to sandy loams of the Harcourt and Stony Brook units, which are only moderately fertile. |
|
This latter unit consists of an irregular succession of coarse-grained to finely conglomeratic sandstones several metres thick with rare mudstone to fine sandstone horizons. |
|
The landscape south and east of Fredericton is covered with compact loams to clay loams derived from the easily weathered red mudstone and grey sandstone. |
|
The bedrock consists almost entirely of Pennsylvanian red and grey sandstone, conglomerate and red mudstone, interbedded with coal horizons of variable width. |
|
Beneath the drift deposits of the Vale of York lie Triassic sandstone and mudstone, and lower Jurassic mudstone but these are completely masked by the surface deposits. |
|
Neogene sediments in the basin consist mainly of a series of fluviolacustrine mudstone, siltstone, sandstone and conglomerate with about 800 m maximum thickness. |
|
George moved to Alton Grange in 1831 to supervise, and a seam of coal was found after digging through a layer of waterlogged mudstone over hard volcanic greenstone. |
|
The surrounding strata, if shale or mudstone, often contain slightly more than average and this may also be reflected in the ash content of 'dirty' coals. |
|
|
These are laminated mudstone and siltstone, typical of the Skiddaw range. |
|
The northern slopes display the underlying olistostrome of disrupted, sheared and folded mudstone, siltstone and sandstone of the Buttermere Formation. |
|
The Cat Bells ridge is an example of the Buttermere Formation, an olistostrome of disrupted, sheared and folded mudstone, siltstone and sandstone. |
|
In addition, a strongly hydrozincite stained mudstone occurs approximately 150 meters stratigraphically lower than the present exhalite-mudstone-dacite sequence being drilled. |
|
Jurassic Kimmeridge interbedded limestone and mudstone sequence. |
|