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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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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.
• 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.
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.
Specimens of Shale, collected from Yorkshire. Shale is a fine grained, clastic sedimentary rock composed of mud. This mud is a mixture of clay mineral flakes and tiny fragments of other minerals, especially quartz and calcite. Shale is characterised by thin laminae, parallel layering or bedding, less than one centimetre in thickness. This makes the rock very fissile. Shales are associated with quiet water deposition, such as in lakes, lagoons or deltas. For these specimens in particular, the depositional environment was deep water marine from the Jurassic formations of the Yorkshire coast. These specimens are available in multiple sizes and come supplied in a white card tray with information label.
We also supply Shale thin sections for microscope study which are available to buy HERE.
176 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
Specimens of Estuarine Sandstone, collected from Lancashire. Sandstone is a common, well known sedimentary rock, primarily composed of quartz grains. Estuarine sandstone as the name implies was laid down as fine cross bedded deposits at the mouths of rivers. Occasional marine incursions are evident from fossils & ripple bedding. Some of the fine beds are peppered with mica flakes. Specimens are supplied in a white card tray with information label.
We also supply Deltaic Sandstone thin sections for microscope study which are available to buy HERE.
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 Purbeck Limestone, collected from the Isle of Purbeck, Dorset, in the UK. Purbeck Limestone is a fossiliferous limestone that dates from the Upper Jurassic to Lower Cretaceous period. Its deposition environment is a fresh to brackish water environment with occasional marine incursions. It’s characteristic appearance comes from densely packed shells of the freshwater snail Viviparus set in a lime mud matrix. It’s uses include construction as a building and decorative stone which is visible in Canterbury, Lincoln, Salisbury cathedrals & Westminster Abby to name but a few. These specimens are available in multiple sizes and come in a white card tray with information label.
We also supply Purbeck Limestone thin sections for microscope study which are available to buy HERE.
193 in stock
Specimens of Pisolite, collected from Gloucestershire, UK. Pisolites are sedimentary rocks which consist of pisoliths – concretionary grains which resemble ooids, but always more than 2mm in diameter. These pisoliths often consist of calcium carbonate, but can sometimes of rarer minerals too. These grains are approximately spherical and have concentric layers which can reach reach 10 mm in diameter. These examples date to the Mid Jurassic (Aalenian: 177 – 180Ma). Specimens are available in multiple sizes and come in a white card tray with an information label.
We also supply Pisolite thin sections for microscope study which are available to buy HERE.
6 in stock
Specimens of Puddingstone, collected from Hertfordshire, UK. Puddingstone is a variation of conglomerate, which is term used to describe a coarse grained sedimentary rock, featuring large, well rounded clasts in a finer grained matrix. It dates back to the Paleocene to Eocene period around 56 millions years ago. This particular rock is composed almost entirely of silica and has no porosity, likely contributing to its notorious hardness. This rare rock is only found in quantity at one locality in Hertfordshire. As such, it is becoming exceedingly difficult to obtain. This rock is available in multiple sizes and each piece comes supplied in a white card tray with information label.
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 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 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
Specimens of Cannonball Limestone, collected from around the Hartlepool area, in the UK. This is a very distinctive and rare form of limestone known as Cannonball rock. It is part of the Rocker formation; a basin slope deposit which comprises part of the Zechstein Group. This is a highly studied sedimentary formation which dates to the Mid to Late Permian Period. These specimens are small, and come supplied in a 1.5″ x 1.5″ plastic magnifier box with an information label.
5 in stock
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