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Millstone Grit. A coarse grained Carboniferous (Namurian) sandstone from the North of England.
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Milllstone Grit is a fine- to very coarse-grained feldspathic sandstones, interbedded with grey siltstones and mudstones, with subordinate marine shaly mudstone, claystone, coals and seatearths. It is Carboniferous ( Namurian) in age & laid down in estuarine to tidal environments. Millstone Grit forms many prominent features throughout the north of England. It’s well cemented structure has made it an ideal building stone for the characteristic terrace cottages & mills of the area prior to the mass use of bricks. As the name implies, it was the preferred lithology to make millstones. This example was collected near Horwich, Bolton. Specimens are supplied in labelled card trays. it can also be purchased by weight in 1kg bags.
Weight | 120 g |
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Specimen Size | 2" x 2", 3" x 2", 4" x 3" |
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Puddingstone conglomerate is a rare sedimentary rock from Hertfordshire, UK which formed during the Paleocene to Eocene period. Composed of rounded flint clasts within a silica matrix, this rock is quite hard and breaks with conchoidal fractures. Formed through erosion of flint pebbles which were later cemented by sand and silica, it is an excellent representation of conglomerate, detailing rounded clasts within a matrix. The specimens are available in 4 sizes and come supplied in a card tray with a label.
298 in stock
Millstone grit thin section slide exhibiting the coarse and siliceous nature of this British Carboniferous coarse sandstone. The section is made to 30 microns thickness and the glass is 46 x 27 mm in size with a cover slip. Supplied in a protective card sleeve with a label, ideal for microscopy.
Out of stock
Carboniferous Millstone Grit found in Lancashire, once a popular building material due to its strength. Available by weight, comes in a 1 kg bag.
Out of stock
Shelly limestone containing numerous fossil of Carboniferous age, including bivalves , corals, crinoids & brachiopods. These specimens were collected in Gloucestershire, Uk. They are available in a variety of sizes.
Pre-Cambrian Torridonian Sandstone from Loch Kishorn, Scotland. Among the oldest rocks to be found in the U.K. Named after the Torridon region of Scotland.
285 in stock
Rhaetic bone bed, Upper Triassic in age. Rich in marine fossils such as bones, scales & teeth from marine reptiles. From Aust Cliff, Gloucestershire.
36 in stock
Devonian lower Old Red Desert Sandstone from Gloucestershire available in card trays with a label.
196 in stock
Carboniferous Chert found in Lancashire supplied in a card tray with label.
Out of stock
Frosterley Marble is not a marble but a black limestone containing fossil coral specimens of Carboniferous age. The specimens are from Harewood quarry, Co. Durham, and come supplied in a white card tray with an information label.
60 in stock
Travertine is a form of limestone which has been precipitated from carbonate rich hot springs. These examples are from Yorkshire, UK and are supplied in a labelled card tray.
38 in stock
Peat (recent) collected on the moorlands of Lancashire. Supplied in a labelled card tray.
Out of stock
A Triassic red millet seed sandstone of aeolian (wind blown) desert origin.
183 in stock
Carboniferous coral limestone from Anglesey, North Wales. Composed largely of well preserved Lithostrotion corals
50 in stock
This Breccia is a calcrete cemented scree deposit of Pleistocene age from the Manifold Valley in Staffordshire.
40 in stock
Ribbon banded mudstone, Silurian in age, collected from the Denbigh grits in Wales, UK. Available in various sizes.
300 in stock
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