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PRODUCTS BY WEIGHT
BOX SETS
PLASTIC DISPLAY PRODUCTS
PRODUCTS BY WEIGHT
BOX SETS
PLASTIC DISPLAY PRODUCTS
£20.00 £18.00 ex VAT
A thin section of A’a Lava produced from the famous Laki Eruptions of 1783 – 1785 in Iceland. The thin section exhibits the highly vesicular nature of this extrusive volcanic rock. Each section is made to 30 microns thickness and the glass is 46 x 27 mm in size with a cover slip
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A thin section of A’a Lava produced from the famous Laki Eruptions of 1783 – 1785 in Iceland. The thin section exhibits the highly vesicular nature of this extrusive volcanic rock. These sections look very similar to those of the volcanic scoria which we supply. Both formed from basaltic lava ejected from a volcano. The lower pressures allow gases which were once dissolved in the magma to come out of solution. The gases produce holes or vesicles in the molten rock and as the rock cools and solidifies the bubbles become frozen. Typically volcanic scoria is basaltic or andesitic in composition; these magmas are typically less viscous than those which form pumice and as such scoria is denser than pumice with larger vesicles. Our thin sections clearly depict the vesicular nature of this material. Each 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 and educational purposes.
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Obsidian, also known as ‘volcanic glass’ is a felsic, extrusive igneous rock. Crystal growth is minimal / absent within obsidian due to rapid solidification rates which inhibit crystal growth thus giving the rock a glassy appearance.
4 in stock
Lignite thin section slide. Lignite coal and indeed all other varieties of coal are classed as organic sedimentary rocks. It has a high carbon content 25 – 35% & a moisture content up to 66%. The high volatile component of lignite is clearly reflected in the thin section view, particularly when compared with those of higher grade coals.
7 in stock
Hornblende Gneiss thin section slide exhibiting an abundance of the mafic mineral hornblende, accompanied by less abundant biotite mica, quartz and feldspar. This material was collected by staff from Southern Norway. Each section is made to 30 microns thickness and the glass is 46 x 27 mm in size, ideal for microscopy and educational purposes.
3 in stock
Tufa thin section slide. Tufa is a variety of limestone, formed by the precipitation of carbonate minerals from ambient temperature water bodies. This particular material is from the Flandrian epoch of the Quaternary Period and it was collected in Caerwys, North Wales.
5 in stock
These thin sections exhibit beautiful crystals of olivine, pyroxene and augite, which often shows oscillatory zonation held within a matrix of plagioclase feldspar. The slides supplement the hand specimens nicely and are useful for interpreting the crystallisation history of the rock.
11 in stock
Garnet Mica Schist thin section exhibiting textbook strain fabric and alignment of platy minerals within this popular metamorphic rock.This schist is from the Dalradian series, a complicated group of various metamorphic rocks which are dated to the Pre-Cambrian period and is present in both Scotland and Ireland.
7 in stock
Metaquartzite thin section slide exhibiting a fine, interlocking mosaic of quartz crystals characteristic of this metamorphic rock. Each section is made to 30 microns thickness and the glass is 46 x 27 mm, ideal for microscopy and educational purposes.This material was collected near Holyhead on the Isle of Anglesey, North Wales.
7 in stock
Hornfels thin section microscope slide exhibiting a dark colour and a characteristic none crystalline form. Fine grains fit together like the fragments of a mosaic, this is often referred to as rough pavement or pavement structure. Larger quartz clasts are visible but these have recrystallised to form a fine, interlocking mosaic of quartz within the original grain cast.
4 in stock
Bytownite basalt thin section slide exhibiting phenocryts of bytownite feldspar within a fine basaltic groundmass. These thin sections depict beautifully a textbook porphyritic texture. Each section is made to 30 microns thickness and the glass is 46 x 27 mm in size.
7 in stock
Torridonian sandstone thin section slide exhibiting a fine grained arenaceous nature. The Torridonian Sandstones date from the Pre-Cambrian & are amongst the oldest rocks to be found in the UK. The section is made to 30 microns thickness and the glass is 46 x 27 mm in size with a cover slip.
5 in stock
Rhomb porphyry thin section exhibiting the textbook porphyritic texture of this rare igneous rock. The thin section shows a fine grained alkali feldspar groundmass with large phenocrysts of augite. This material was collected near Oslo in Norway.
11 in stock
Gabbro thin section exhibiting some of the textbook features one would expect from this coarse, mafic igneous rock. These slides supplement the hand specimens nicely and are useful for interpreting the crystalisation history of the rock.
We provide a full range of igneous, sedimentary, metamorphic and mineral thin sections. Click here to view them. Should you require a microscope, they can be found here.
3 in stock
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