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The dyke is composed of basaltic andesite which is amygdaloidal in places. [6] The dyke has been worked for roadstone at numerous localities including Barrock Fell near Armathwaite in Cumbria and at both Cockfield Fell and Bolam in County Durham. [7] Setts for road construction were made from the dyke at Langbaurgh. [8]
Andesite is usually light to dark grey in colour, due to its content of hornblende or pyroxene minerals. [2] but can exhibit a wide range of shading. Darker andesite can be challenging to distinguish from basalt, but a common rule of thumb, used away from the laboratory, is that andesite has a color index less than 35. [9]
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The tholeiitic magma series (/ ˌ θ oʊ l i ˈ aɪ t ɪ k /) is one of two main magma series in subalkaline igneous rocks, the other being the calc-alkaline series. A magma series is a chemically distinct range of magma compositions that describes the evolution of a mafic magma into a more evolved, silica rich end member.
The breccias in the Fifes Peak are mostly shades of gray, purple, and red, with angular to subrounded rock fragments cemented by ash. The fragments are a few inches in dimension, rarely a foot long. They are mostly andesite porphyry, pumice, and glass. With fewer rock fragments, the breccias is a buff and tan. Pieces of petrified wood may be ...
Get ready for winter baking with these recipes, featuring seasonal favorites like fruitcake and bûche de Noël, and classics like coffee cake and rum cake. Step Aside, Cookies—These 55 Cakes ...
Kwanzaa (December 26 to January 1, every year) is a non-secular (i.e., not a replacement for Christmas) holiday celebrated by Black Americans, as well as Afro-Caribbeans and others of African ...
A hāngī pit is dug to a depth of between 50–100 cm (20–40 in), sufficient to hold the rocks and two stacked baskets of food. Logs, usually mānuka or kānuka, are stacked over the pit with the rocks, commonly andesite or basalt, on top. The logs are lit and is left to burn for 3 to 4 hours, heating the rocks to 600–700 °C (1,100 ...