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Boulder clay from Yorkshire, UK from the Pleistocene period, shows random sized various clasts within a glacial clay matrix. Formed through various glacial or ice sheet processes, these sedimentary rocks are available in various sizes.
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Your return will usually be processed within a week to a week and a half. We’ll send you a Return Notification email to notify you once the return has been completed.
Please allow 1-3 business days for refunds to be received to the original form of payment once the return has been processed.
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Phone: +1 (23) 456 789
Boulder clay (also known as till), in the terms of geology is in reference to clay which is formed various ground moraine material from glacier and ice sheet activity, past of present, as such, sorting of such material is practically absent and orientation of clasts is completely random. As the name suggest, boulders can be found in this variation of clay, however, the size of samples we supply do not exhibit this. It is produced from the attrition (scraping) of the top layers of rock which come in to contact with the ice in a glacier or ice sheet, this attrition of the top most layers of rock is what produces the fine silt clay, and anything of any size in the path of the glacier or ice sheet (form pebbles to boulders) become incorporated into said clay. These specimens exhibit small pebble sized clasts when viewed closely, they are date to the Pleistocene period, some 2,588,000 to 11,700 years ago and come from Yorkshire, UK. Rock specimens are available in various sizes and will come in a card tray with an information label.
Weight | 120 g |
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Specimen Size | 2" x 2", 3" x 2", 4" x 3" |
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Oxford clay from Scarborough, North Yorkshire, a grey to green colour exhibiting a fine grained texture, these rock specimens are Jurassic in age and are available in various sizes.
Kimmeridge clay is a fine grained sedimentary rock of Jurassic age, it can contain various fossils from invertebrates to large fauna such as dinosaurs and crocodiles. These specimens come from Kimmeridge, Dorest, UK and are available in various sizes.
Salt Pseudomorphs on a limy marl matrix collected from the Triassic Aust Cliff in Avon. Numerous cubic imprints can be identified on the limy marl substrate of these specimens; they serve as interesting educational pieces.
20 in stock
Peat (recent) collected on the moorlands of Lancashire. Supplied in a labelled card tray.
Out of stock
Specimens of fault breccia found in Great Langdale, Cumbria, UK. These specimens are fault breccia meaning that unlike other breccia they were formed by tectonic forces. Specimens are supplied in a white card tray with a information label.
Carboniferous ( Dinantian ) Limestone from the White Peak area of Derbyshire.
100 in stock
This Breccia is a calcrete cemented scree deposit of Pleistocene age from the Manifold Valley in Staffordshire.
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Purbeck limestone (also known as Purbeck marble) is a fossiliferous carbonate rock found on the Isle of Purbeck in Dorset. UK. Upper Jurassic to Lower Cretaceous in age. Available in a variety of sizes.
198 in stock
Tufa rock specimens which are calcium carbonate rich, sponge-like rock with fossil remains. Believed to be from the Quaternary period, particularly, the Flandrian epoch the specimens come from Caerwys, North Wales. Available in various sizes and supplied in a card tray with labels.
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Lower Carboniferous crinoidal limestone from Derbyshire, U.K.
296 in stock
Dolomite or Dolostone is a carbonate rock composed primarily of the mineral Dolomite.
Out of stock
Carboniferous Chert found in Lancashire supplied in a card tray with label.
Out of stock
A fine grained sandstone formed in estuarine (river mouth) conditions, composed of fine quartz and mica.
Dark grey Graptolitic Shale from Scotland or Cumbria. Contains the delicate blade-like fossils of Graptolites. These were small, colonial marine creatures. Please note that the graptolite content of these specimens is variable.
20 in stock
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