Leçon :
Histoire et dĂ©finition : Le marbre sâest formĂ© il y a environ 400 millions dâannĂ©es. En gĂ©ologie, le marbre est une roche mĂ©tamorphique dĂ©rivĂ©e du calcaire et constituĂ©e principalement de cristaux de calcite. C'est lâaugmentation de la pression et de la tempĂ©rature qui a transformĂ© cette matiĂšre en marbre dans certains endroits de la planĂšte.
Cette roche a sublimĂ© les plus belles Ćuvres d'arts et façades de bĂątiments luxueux, mettant en lumiĂšre un patrimoine riche et colorĂ©. Dâune Ă©lĂ©gance naturelle, le grain doux et soyeux du marbre, est utilisĂ© pour la fabrication de sculptures et dâobjets de dĂ©coration.
VariĂ©tĂ©s et caractĂ©ristiques : Les marbres prĂ©sentent une grande diversitĂ© de coloris (blanc, beige, crĂšme, rouge, bleu, vert), bien que la couleur de base de la calcite soit le blanc. Les veines, appelĂ©es marbrure, sont apparues sous lâeffet dâune pression trop forte, le marbre sâest fendillĂ©, ouvrant des passages pour des sĂ©diments organiques ou minĂ©raux qui leur ont donnĂ© leur couleur.
Les variĂ©tĂ©s de marbre peuvent ĂȘtre classĂ©es en trois groupes.  Les veinĂ©s, qui sont de couleur uniforme et sont traversĂ©s par des veines de couleurs variĂ©es. Les brĂ©chĂ©s, qui sont formĂ©s des dĂ©bris de marbres et dâautres roches. Les nuageux, qui sont Ă©galement constituĂ©s de fragments, mais en forme de nuages
Bon GĂ©ocaching Ă tous đ
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With Flo, we share a great passion for geocaching: EarthCaches đ„°. We are intense rock hunters! đȘšđ You could even say itâs a real crush đ€ą. Our second geocaching passion is GeoArt đ€©. So we pushed ourselves a bit and decided to mix the two. A big headache to set up đ”â, but in the end, totally doable.

Questions :Â Locate the staircase shown in the photo above and answer the following:
1 - What are the names of the main crystals that make up marble ?
2 - Based on your observation, is this veined, brecciated, or cloudy marble ?
3 - What is the color of this marble and the color of its veining ?
4 - Take a photo in front of this wall (without the marble), with your geocaching username visible, and make a âïž sign with your hand.
EarthCache Rules: "Log this "Found it" cache and send me your suggested answers either via my profile or via email, and I will contact you if there is a problem."
Lesson :
History and definition : Marble was formed approximately 400 million years ago. In geology, marble is a metamorphic rock derived from limestone and composed primarily of calcite crystals. Increased pressure and temperature transformed this material into marble in certain parts of the world.
This rock has graced some of the most beautiful works of art and the facades of luxurious buildings, highlighting a rich and colorful heritage. Naturally elegant, the smooth, silky grain of marble is used in the creation of sculptures and decorative objects.
Varieties and characteristics: Marbles exhibit a wide variety of colors (white, beige, cream, red, blue, green), although the base color of calcite is white. The veins, known as marbling, appeared under the effect of excessive pressure; the marble cracked, creating passages for organic or mineral sediments that gave it its color. Marble varieties can be classified into three groups. Veined marbles are uniform in color and traversed by veins of varying colors. Breccia marbles are formed from fragments of marble and other rocks. Cloudy marbles are also composed of fragments, but in a cloud-like pattern.

Happy GĂ©ocaching everyone đ