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Garnet peridotite igneous rock specimens found in the Gusdal Olivine Pit, Åheim, Norway is an ultra mafic rock which contains high pressure and temperature minerals such as olivine and garnet crystals. Exhibiting a green colouraiton with striking red spots, these samples were pushed up to the earths crust during the Caledonian orogeny during the Ordovician and Devonian period over 400 million years ago. The specimens are dense as expected and are ideal for children and serious collectors because of the colourful appearance as well as for higher educational use to describe deep mantle material as well as orogenic processes. The hand samples are available in various sizes and come supplied in a card tray with an information label.
We also supply Garnet Peridotite thin sections for microscope study which are available to buy HERE.
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Phone: +1 (23) 456 789
Garnet peridotite is a coarse grained, ultra mafic igneous rock which forms at extreme depths within the earths upper mantle, over 40 Km in depth, as such, the rock is composed of high pressure, high temperature forming minerals such as olivine which gives the rock an over all green colouration of varying shades. (some appear lighter shades and some darker). Due to the depths and temperatures that this rock forms at, it contains little silica minerals such as quartz, less than 40%. As the name implies, the samples also contain a fairly sizeable amount of rich red garnet crystals as well which offers a striking opposition in colouration between the two main constituent minerals. Current dating suggests that this rock formed over 1.2 billion years ago and was brought up to the earths surface through tectonic activity, particularly the Caledonian orogeny, which was a large scale mountain building event which occurred between the Ordovician to Early Devonian period, 490–390 million years ago. This huge event occurred when the prehistoric ocean known as the Iapetus close due to the ancient continents of Laurentia, Baltica and Avalonia colliding, resulting in land masses along the borders colliding with one another across what is now modern day Scandanavia, the British Isles, Greenland and part of Northern Europe. The result was the large Caledonian mountain range spanning across the above mentioned areas which can still be visited to this day such as the Grampian highlands in Scotland. This huge event pushed up mantle material which contained the garnets and peridotites to the earths crust where weathering and erosion has since exposed pockets of them. These particular specimens come from the famous Gusdal olivine pit in Åheim, southern Norway and are excellent for collectors of all levels and ages due to the the vibrant colours the samples exhibits as well as for college and higher educational education, in which these specimens can be used to describe deep mantle rocks as well as orogenic processes (in this case the Caledonian orogeny) can result in such material being available at the surface. Specimens are available in various sizes and come supplied in a card tray with a label.
We also supply Garnet Peridotite thin sections for microscope study which are available to buy HERE.
Weight | 130 g |
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Specimen Size | 1.5 " x 1.5", 2" x 2", 3" x 2", 4" x 3" |
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The metamorphic rock texture card is made for earth science students, it displays numerous bites of information on how to determine an metamorphic rock specimen found in the field via their observable features. The cards have been laminated, making them waterproof, small, the size of a bank card and an excellent to hand guide for students, amateurs and professionals.
Accretionary lapilli tuff is an igneous pyroclastic rock, these samples come from Longsleddle, Cumbria in the UK and forms when hot ash and debris is ejected from as volcano. Some of this material is held together by moisture and once heavy enough, falls into the ash below forming small ‘spots’ within the material, creating a speckled rock. The samples are suitable both for young and serious collectors as well as educational use and are supplied in various sizes with a card tray and label.
65 in stock
Ignimbirte welded tuff is a pyroclastic rock of any origin formed through volcanic processes, the rock appears to show streaks of welded material on some surfaces and appears to be rhyolitic on the inside. Specimens come from Cumbria and are available in various sizes.
We also supply Welded Tuff thin sections for microscope study which are available to buy HERE.
72 in stock
Specimens of Basalt, collected from Northern Ireland. Basalt is a common, extrusive igneous rock, that forms when magma erupts and cools quickly on the Earth’s surface. These specimens are part of the Antrim lava group and date to the Tertiary period, around 60 million years ago. This is the same as the Basalt that makes up the famous Giant’s Causeway. The chemistry of these specimens suggests that the rock is olivine basalt, and comprises plagioclase feldspar, olivine and augite. These specimens are available in multiple sizes and come in a white card tray with an information label.
We also supply Basalt thin sections for microscope study which are available to buy HERE.
10 in stock
Rock specimen sample cards, these cards are blank having spaces for you to write the ‘name’, ‘age/horizon’ and ‘locality’ of a rock specimen or specimens collected. Ideal for conducting field work or cataloging your collection. 73mm x 46mm.
1932 in stock
Streak plates in a black colour made form porcelain, tough and ideal for performing streak tests, to asses minerals or mineral content of a rock sample, each plate is 45 x 45 mm in size and has a fine texture surface. Excellent for field geologists and earth science students.
The igneous rock texture card is made for earth science students, it displays numerous bites of information on how to determine an igneous specimen found in the field such as grain size, silica and mineral content and other observable features. The cards have been laminated, making them waterproof, small, the size of a bank card and an excellent to hand guide for students, amateurs and professionals.
127 in stock
A ten specimen metamorphic rock set produced by our selves at our warehouse in the UK, the set comprises of ten samples picked out to details textures and features such as foliation, banding, high temperature or pressure minerals and more pertaining to the various grades of metamorphism. The samples sit within a plastic cell inset which its self is housed within a blue sturdy card box with a lid. The inside of the lid also has a colour photo key chart which exhibits pictures of the specimens as well as names and locations they are from. An excellent basic set for educational use or as a gift.
4 in stock
A field guide containing various pages which are based on the munsell colour system to aid in the identification of rocks whilst working in the field.
Out of stock
Specimens of Rapakivi Granite sourced from South Finland, which have undergone cutting and polishing. This particular rock belongs to the Granite family, and shares the typical characteristics of granite. Those being a coarse-grained, plutonic igneous rock, consisting of orthoclase feldspar, quartz, and biotite mica. Each piece comes packaged in a white card tray accompanied by an information label.
Specimens of Flint, collected from South Devon in the UK. Flint, a variety of Chert, is a micro crystalline, sedimentary rock. It is part of the silicate family and has a conchoidal fracture. These specimens display a monochromatic black interior, offset by a distinct white exterior. These specimens are available in various sizes and come in a white card tray with an information label.
Rhyolite Felsite, a highly felsitic composed variation of Rhyolite, found in Fife, Scotland, an extrusive igneous rock composed of sodium, quartz and feldspar, thus often having a pale white to pink colouration. Available in various sizes and supplied in a card tray with an information label.
32 in stock
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