Pinterest • Le catalogue d'idées

Géologie Définition

à partir de GEO

Le lac glaciaire Jökulsarlon - Les spectaculaires paysages d’Islande

Les spectaculaires paysages d’Islande Plus

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Rainbow Mountains Peru 13669824_1160213937368929_1011172047118524184_n.jpg (640×640)

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Midway Geyser, Yellowstone National Park, Wyoming, USA

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Mars' Victoria Crater at Meridiani Planum taken by NASA's High Resolution Imaging Science Experiment (HiRISE) camera.

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// Potash Evaporation Ponds, Moab (Utah) Arunachal Pradesh http://www.bijouxmrm.com/

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The definition of massicot as orthorhombic PbO dates from the 1840s but the substance massicot and the name massicot has been in use since the late medieval era. #science #nature #geology #minerals #rocks #infographic #earth #massicot

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à partir de AmonGraf

16 Reasons Why You Must Visit Iceland Right Now. Amazing no. #12

Montagne de Landmannalaugar, Islande

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The Mohs scale of mineral hardness characterizes the scratch resistance of various minerals through the ability of a harder material to scratch a softer material. It was created in 1812 by the German geologist and mineralogist Friedrich Mohs and is one of several definitions of hardness in materials science.[1] The method of comparing hardness by seeing which minerals can scratch others, however, is of great antiquity, having first been mentioned by Theophrastus in his treatise On

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Via Something Diffrent (http://somthing-diffrent.tumblr.com/post/23545965852#). In search of credits.

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