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- Noun

A mineral of a brownish black color, related to titanite in form. It consists chiefly of silica, titanium dioxide, lime, and yttria.

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    Keilhauite (also known as yttrotitanite) is a variety of the mineral titanite of a brownish black color, related to titanite in form. It consists chiefly of silicon dioxide, titanium dioxide, calcium oxide, and yttrium oxide. The variety was described in 1841 and named for Baltazar Mathias Keilhau (1797-1858) a Norwegian geologist.

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    Keilhaufjellet is a mountain in Sørkapp Land at Spitsbergen, Svalbard. It has a height of 660 m.a.s.l. The mountain is named after Norwegian geologist Baltazar Mathias Keilhau. Keilhaufjellet was the southernmost triangulation point established during the Swedish-Russian Arc-of-Meridian Expedition (from 1899).

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    Keilhauia is a genus of ophthalmosaurid ichthyosaur, a type of dolphin-like, large-eyed marine reptile, from Early Cretaceous shallow marine deposits in Svalbard, Norway. The genus contains a single species, K. nui, known from a single specimen discovered in 2010 and described by Delsett et al. in 2017. In life, Keilhauia probably measured approximately 4 metres (13 ft) in length; it can be distinguished by other ophthalmosaurids by the wide top end of its ilium and the relatively short ischiopubis (the fusion of the ischium and the pubis) compared to the femur. Although it was placed in a basal position within the Ophthalmosauridae by phylogenetic analysis, this placement is probably incorrect.

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    Keilhaubreen is a glacier in Sørkapp Land at Spitsbergen, Svalbard. It has a length of about five kilometers and is located north of Keilhaufjellet, flowing from Sørkappfonna towards the eastern coast of Spitsbergen. The glacier is named after Norwegian geologist Baltazar Mathias Keilhau. To the south of the glacier is the bay Austerbogen.

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