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A small hand sample of fossil limestone containing numerous small Scyphocrinites crinoid stem fragments. Crinoids are fossilised sea lilies, these particular sample come from South Morocco. Often the stems are only preserved in fragments as can be seen. Samples measure approx in 3″ size and come in a small card tray with a label.
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Geological Age: Silurian Period, 420 million years ago
Location: Tafilalet, Alnif, Southern Morocco
A small hand sample of fossil limestone containing numerous small Scyphocrinites crinoid stem fragments. Crinoids are fossilised sea lilies, these particular sample come from South Morocco. Often the stems are only preserved in fragments as can be seen. Samples measure approx 3″ in size and come in a small card tray with a label.
Weight | 120 g |
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Specimen Size | 2" x 2", 3" x 2", 4" x 3" |
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Specimens of Crinoidal Limestone, collected from Derbyshire in the UK. Limestone is a common, well known sedimentary rock. It consists of the calcium-rich shells, bones, and skeletons of the fauna that dominated during that period. It was laid down approximately 350 million years ago in semi tropical seas and comes from the Dinantian epoch of the Lower Carboniferous. This limestone in particular contains crinoids which are a group of ancient marine invertebrates, and part of the sea lily family. Specimens are available in various sizes and come supplied in a white card tray with information label.
We also supply Crinoidal Limestone thin sections for microscope study which are available to buy HERE.
288 in stock
• Geological Age: Carboniferous period
• Location: Clitheroe, Lancashire, UK
• Family: Echinoderm
• Species: Crinoid
Fossil crinoid stems from Clitheroe, Lancashire, these specimens are excellent for collectors and educational use, they are of an fairly good size where morphological details can be easily seen, ranging from 40 to 60 mm in length and varying thicknesses. They samples will come supplied in a card tray with a label.
• Geological Age: Silurian period, 443 to 416 millions years old
• Location: Djebel Issoumour, Alnif, Morocco
• Family: Echinoderm
• Species: Crinoid
Moroccan fossil crinoid stem specimens supplied in packets of 5 pieces, dated to over 400 million years old, they lived during the Silurian period and show excellent clear morphological details such as stem segments. Ideal for educational use and young collectors.
Lower Carboniferous crinoidal limestone from Derbyshire, U.K. Supplie dby weight in lots of 1 kg. Comes in a polythene bag with an information label.
Specimens of Ribbon Banded Mudstone, collected from North Wales. In particular, these specimens are Silurian in age & specifically from the Nantglyn Flag Group of the Denbigh Grit Formation. This largely grey rock shows alternating bands of fossiliferous mudstone and laminated muddy siltstone with subordinate thin pale green to yellowish lenticular bands of calcareous siltstones. These specimens are available in multiple sizes and come supplied in a white card tray with an information label.
294 in stock
Specimens of Mudstone, collected from Lancashire. Mudstone is a very fine grained sedimentary rock, that consists of clay minerals and tiny quartz grains. Mudstone lacks a well developed bedding structure or fissility. This lithology is typical of low energy environments, such as tidal flats, lakes or deep marine environments. These specimens date to the Carboniferous period, approximately 359 – 299 million years ago. The specimens are availeable in multiple sizes, and come in a white card tray with an information label.
We also supply Mudstone thin sections for microscope study which are available to buy HERE.
300 in stock
Specimens of Shelly Limestone, collected from Gloucestershire. This is a fossiliferous limestone from the Carboniferous Period, around 350 million years ago. These specimens are buff to grey in colour and highly compact. It is abundant in various marine fossils, including corals, crinoids, brachiopods and bivalves. The Carboniferous Limestone is the main lithology underlying the Forest of Dean basin & also forms the cliffs of the Wye Valley. Specimens are available in multiple sizes and come supplied in a white card tray with information label.
1 in stock
Specimens of Conglomerate, collected from Farringdon, Berkshire in the UK. Conglomerate is a term used to describe a group of coarse grained sedimentary rocks, featuring large well rounded clasts in a finer grained matrix. They were laid down in a high energy environment, either fluvial, alluvial or shallow marine. The roundness of the clasts can be an indicator of the transport distance or the action of sustained erosion. These specimens are available in multiple sizes and come supplied in a white card tray with an information label.
We also supply Conglomerate thin sections for microscope study which are available to buy HERE.
200 in stock
Specimens of Millstone Grit, collected from Horwich, Bolton in the UK. Millstone Grit is part of the sandstone family and ranges from fine to very coarse grained. It is a feldspathic sandstone, interbedded with grey siltstones and mudstones, with subordinate marine shaly mudstone, claystone, coals and seatearths. It is Carboniferous (Namurian) in age and laid down in estuarine to tidal environments. Millstone Grit forms many prominent features throughout the north of England. These specimens are available in multiple sizes and come supplied in a white card tray with an information label.
We also supply Millstone Grit thin sections for microscope study which are available to buy HERE.
86 in stock
Specimens of Chalk, collected from Yorkshire, in the UK. Chalk is a soft, white, porous sedimentary carbonate rock and form of limestone. It forms in reasonably deep marine conditions, by the gradual accumulation of minute calcite plates, known as coccoliths, which shed from micro-organisms called coccolithophores. Additionally, it is not uncommon to find flint or chert nodules embedded in chalk. These specimens are Cretaceous in age, available in multiple sizes, and supplied in a white card tray with information label.
We also supply Chalk thin sections for microscope study which are available to buy HERE.
266 in stock
Specimens of Limestone, collected from Derbyshire. Limestone is a common, well known sedimentary rock. It consists of the calcium-rich shells, bones, and skeletons of the fauna that dominated during that period. It was laid down approximately 350 million years ago in semi tropical seas and comes from the Dinantian epoch of the Lower Carboniferous. This rock is very pure, about 98% soluble in rainwater (over time) leaving only residual clay. Its uses include aggregate, building stone, the manufacture of cement, paper & calcium carbide. Available in various sizes, each piece comes supplied in a white card tray with information label.
We also supply Limestone thin sections for microscope study which are available to buy HERE.
100 in stock
Dolostone or dolomite rock is a sedimentary carbonate rock that contains a high percentage of the mineral dolomite, CaMg(CO3)2. Most dolostones formed as a magnesium replacement of limestone or lime mud prior to lithification. It is resistant to erosion & less soluble than limestone in weakly acidic groundwater. Technically, dolostone has a stoichiometric ratio (reaction & product ratio) of nearly equal amounts of magnesium and calcium. This particular example comes from the Clitheroe area of Lancashire. Specimens are supplied in labelled card trays.
Out of stock
Specimens of Coral Limestone, collected from Anglesey. Limestone is a common, well known sedimentary rock. It consists of the calcium-rich shells, bones, and skeletons of the fauna that dominated during that period. These specimens date to the Palaeozoic era around 300 million years ago. They were laid down in shallow tropical seas around 300 million years ago, in the Carboniferous. The composition of these specimens is primarily Lithostrotion corals. They are available in multiple sizes and come supplied in a white card tray with an information label.
We also supply Coral Limestone thin sections for microscope study which are available to buy HERE.
50 in stock
Specimens of Oolitic Limestone, collected from Gloucestershire in the UK. Oolitic Limestone is a carbonate rock, that consists mostly of ooliths (or ooids). These are sand-sized carbonate particles (0.25 -2.0mm) built up of concentric shells of precipitated calcium carbonate (CaCO3). These layers form around sand grains or shell fragments that roll around on a shallow sub tropical sea floor, gathering layers of carbonate. Around the Cotswold Hills, the honey coloured stone has been the favoured building material for centuries. Many local picturesque hamlets showcase this. These specimens tend to be a little more friable than the examples from Yorkshire. These specimens are Mid Jurassic in age. They are available in multiple sizes and supplied in a white card tray with information label.
We also supply Oolitic Limestone thin sections for microscope study which are available to buy HERE.
300 in stock
Specimens of Torridonian Sandstone, collected from Torridon, Scotland. These sandstones date from the Pre-Cambrian and are amongst the oldest rocks to be found in the UK. These rocks are part of the Torridonian Supergroup which includes arkoses, shales and conglomerates, and overlie the older Lewisian Rocks. These Torridonian Sandstones are typically hard, with a grain size that ranges from coarse to fine. They often display trough or planar cross bedding which suggests a palaeocurrent flowing from the North West out across large fan deltas. These rocks are dark red to brown in colour, indicating a partly arid (dry) depositional environment. These specimens are available in multiple sizes and come supplied in a white card tray with information label.
We also supply Torridonian Sandstone thin sections for microscope study which are available to buy HERE.
277 in stock
Specimens of Old Red Sandstone, collected from Gloucestershire in the UK. The Old Red Sandstone describes a suite of sedimentary rocks deposited in a variety of environments primarily during the Devonian period, but also extending back to the late Silurian, and on into the earliest parts of the Carboniferous. Alluvial sediments and conglomerates dominate at its base, then progresses to a combination of aeolian, lakes and river sediments. The familiar red colour of the rocks from the presence of Iron Oxide. These specimens are Lower Devonian in age, fine grained and pinkish red in colour. Available in multiple sizes, they come supplied in a white card tray with information label.
We also supply Old Red Sandstone thin sections for microscope study which are available to buy HERE.
174 in stock
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