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Pea Grit (pisolite) is the name given to a Middle Jurassic limestone which is characterised by its large spherical grains or Pisoids, similar to ooliths. Specimens are supplied with a labelled card tray.
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A pisolite is a sedimentary rock made of pisoliths (pisoids) which are concretionary grains – often of calcium carbonate, but sometimes of rarer minerals – which resemble ooids but are always more than 2 mm in diameter. These grains are approximately spherical and have concentric layers which can reach reach 10 mm in diameter. It’s formation is similar to that of an oolite. This example is known as the Pea Grit from the Crickley Hill member of the Middle Jurassic (Aalenian, 177 -180ma) from Gloucestershire. It is fossiliferous, containing abundant bivalves, echinoids , brachiopods & corals. Specimens are supplied in labelled card trays.
Weight | 120 g |
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Specimen Size | 2" x 2", 3" x 2", 4" x 3" |
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Oolitic limestone from the middle Jurassic of Gloucestershire. Traditional building stone throughout the Cotswolds. Available in a range of sizes.
300 in stock
Highly fossiliferous reef limestone from the 425 million year old Wenlock Series of the Silurian. Wren’s Nest, Dudley, West Midlands.
30 in stock
Pisolite microscope slide exhibiting a cross sectional view through pisoid grains held within a drusy calcite cement, perfect for educational use.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.
4 in stock
Hornblende in massive form, collected from Norway, these mineral specimens exhibit a platy cleavage, black to dark green colouration and a dark grey streak. The samples are available in various sizes, show excellent vitreous lustre and will come supplied in a card tray with a label.
Out of stock
Tea Green Marl. A greenish grey dolomitic mudsone from the Triassic of Gloucestershire.
50 in stock
Specification:
* Finliner for writing, sketching, drawing & geological mapping
* Long metal tip, ideal for use with rulers & templates
* Pigment ink, indelible (in accordance with ISO 14145-2), lightfast and waterproof
* Erasable when used on tracing papers, no bleeding when highlighted
* PP barrel guarantees long service life.
* Stroke: Optional (0.1, 0.3 and 0.5 available)
* Colour: Black
Silverline hammer holster, suitable for use with a variety of strike tools and geological hammers. The holster is made from heavy duty suede leather on which a steel cradle is attached, the cradle has a swing point, this allows the hammer to move and tilt according to your body position, ensuring that what ever angle you are at, whether standing, leaning or laying down, the hammer will remain upright at all times. Slots at the top of the holster allow you to attach it to your belt, keeping your tool by your side at all times. Suitable for use with our range of geological hammers which can be found here.
24 in stock
A pack of 3 Power Tank Pens, they work underwater, upside down and on wet paper. Size 1.0 tip. These pens are ideal for field work use. The pens come in a mixed pack of 3 one of each colour: Black, Blue and Red.
Out of stock
Rock Gypsum, a Triassic evaporite deposit from Nottinghamshire, U.K. Specimens are supplied in labelled card trays.
50 in stock
Round plastic tubs or pots made, clear and easily seen through, they are ideal for the safe storage of many small items such as gemstones, plants, sediments, soil, hobby items and more. They measure 46 mm in diameter and are 23 mm high. Supplied with a tight snap shut lid.
Native copper ore mineral specimens from the famous Keweenaw copper deposits of Mitchigan, U.S.A. The specimens have a heavy red-orange metallic specimens with streaks of blue-green oxidation and a wiry crystal habit. Available in a range of sizes.
Out of stock
Millstone Grit. A coarse grained Carboniferous (Namurian) sandstone from the North of England.
90 in stock
This red coloured Marl is a lime (Calcium Carbonate) rich mudstone from the Triassic of Gloucestershire. They are supplied in labelled card trays.
15 cell section geological specimen storage boxes, made from thick robust card which will not split or warp over time.Each box contains a plastic insert which allows you to store up to 15 samples of rocks, fossils, minerals or gemstones in. The cells are 55 x 55 mm and comes with a sturdy lid with a blue colour.
Kraft sample bags are made using the Kraft pulping process resulting thick paper, making the envelopes strong and ideal for storing geological field specimens and geochemical soil samples. These are wet strength bags and can be used to store wet or dry geochemical samples and are 5″ x 10″ in size (125 mm x 250 mm).
Out of stock
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