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Serpentinite from the Maurienne valley, Savoie, ... A variety of chlorite talc schist associated with Alpine serpentinite is found in Val d'Anniviers, ...
Serpentine subgroup (part of the kaolinite-serpentine group in the category of phyllosilicates) [1] are greenish, brownish, or spotted minerals commonly found in serpentinite. They are used as a source of magnesium and asbestos, and as decorative stone. [5]
Serpentine soil is an uncommon soil type produced by weathered ultramafic rock such as peridotite and its metamorphic derivatives such as serpentinite. More precisely, serpentine soil contains minerals of the serpentine subgroup, especially antigorite, lizardite, and chrysotile or white asbestos, all of which are commonly found in ultramafic ...
Because serpentinization lowers the density of the original rock, serpentinization may lead to uplift or exhumation of serpentinites to the surface, as has taken place with the serpentinite exposed at the Presidio of San Francisco following cessation of subduction. [43] Serpentinized ultramafic rock is found in many ophiolites.
Serpentinite bodies can also be found southeast of Merlis, like near Saint-Bazile and Oradour-sur-Vayres, Champagnac-la-Rivière (with six small bodies), La Martinie (south of Champagnac-la-Rivière), La Boissonnie and Lageyrat (west of Châlus) and La Rougerie (east of Dournazac). Slightly off-set to the northwest are two occurrences near Cussac.
Ordovician ophiolite in Gros Morne National Park, Newfoundland Chromitic serpentinite, Bay of Islands Ophiolite, Lewis Hills, Newfoundland. An ophiolite is a section of Earth's oceanic crust and the underlying upper mantle that has been uplifted and exposed, and often emplaced onto continental crustal rocks.
The main lithologies found within the HBO are serpentinite, often in the form of ophicarbonate, with associated sedimentary rocks, including sandstone, limestone, chert and black mudstone (now black slate). The serpentinite is interpreted to be derived from exhumed mantle peridotites, altered to serpentinite at the seafloor. This is consistent ...
Polished slab of bowenite serpentine, a variety of antigorite.. Bowenite is a hard, compact variety of the serpentinite species antigorite (Mg 3 (OH)O 4 Si 2 O 5). [1] Classed as a semi-precious gemstone, [2] it has been used for tools, weapons and jewellery by the Māori in New Zealand, [3] [4] and for jewellery by Fabergé. [5]