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Devonian lower Old Red Desert Sandstone from Gloucestershire available in card trays with a label.
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The Old Red Sandstone is one of two red bed sequences of sedimentary rock in the UK. The Old Red Sandstone describes a suite of sedimentary rocks deposited in a variety of environments during the Devonian but extending back into the late Silurian and on into the earliest part of the Carboniferous. It is dominated by alluvial sediments with conglomerates at its base, and progresses to a combination of aeolian, lakes and river sediments. The familiar red colour of the rocks from the presence of Iron Oxide. This particular example is from the Lower Devonian of Gloucestershire. It is fine grain, well indurated with a pinkish red colour. Each specimen is supplied in a labelled card tray.
Weight | 120 g |
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Specimen Size | 2" x 2", 3" x 2", 4" x 3" |
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A Triassic red millet seed sandstone of aeolian desert origin. Samples come from Penrith, Cumbria and are supplied by weight.
Old red sandstone microscope slide exhibiting the well sorted nature of this particular sediment. Excellent to observe the nature of the minerals and interpret the history of the rock. The glass slide is 46 x 27 mm in size, suitable for enthusiasts, educational use and more, it will come in card sleeve with a label.
Out of stock
Micaceous Sandstone. As the name suggests, this type of sandstone contains flakes of mica which can be seen glinting in the specimens.
Out of stock
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.
299 in stock
Devonian lower Old Red Desert Sandstone from Gloucestershire , sold loose in random sized pieces in a polythene bag by weight.
100 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.
29 in stock
Portland Limestone: a world famous building stone laid down in the Tithonian stage of the Jurassic. Collected from the Isle of Portland, Dorset. Specimens available in a range of sizes.
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.
Out of stock
Conglomerate with well rounded clasts from Faringdon, UK. A good example of the lithotype as opposed to a Breccia which would contain predominantly angular to sub-angular clasts.
200 in stock
Carboniferous coral limestone from Anglesey, North Wales. Composed largely of well preserved Lithostrotion corals
50 in stock
Another variation of shelly limestone. This specimen also includes oolites along with fossil shell fragments. The specimens are a pale cream colour and available in card trays with a label.
50 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.
39 in stock
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
A fine grained sandstone formed in estuarine (river mouth) conditions, composed of fine quartz and mica.
Peat (recent) collected on the moorlands of Lancashire. Supplied in a labelled card tray.
Out of stock
Carboniferous Chert found in Lancashire supplied in a card tray with label.
Out of stock
A fossiliferous siltstone containing numerous fossil shells of Ordovician (Caradoc) age from the Cheney Longville Flags, Winstanstow, Shropshire. The specimens contain fragments of Orthid Brachiopods, Tentaculites & occasional Trilobite fragments.
Out of stock
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