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Date: |
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Description: | Includes:
W73-W76 - Fenites, syenites and breccia from Homa Mountain
W143,W146,W147 - Ijolites and melteigite from Waiga
Natrocarbonatite ash, from 1966 eruption, and clasts from tuffs from Ol Doinyo Lengai, Tanzania
"Ngurumanite" (=melteigite/ijolite) from Nguruman, Lake Magadi, Kenya (see Saggerson and Williams, 1964, J. Pet).
W551 - Glassy welded tuff (phonolitic?) Karau volcano, east of Lake Baringo (< 1.4Ma old)
W678 - Obsidan/pichstone ex volcanic breccia, north Kinangop, top of scarp near Naivasha (c. 2.6Ma old)
43/1/S/5 - Trachytic obsidian, from valley past Subukia turn, Nakuru area (collected by Diana Sutherland)
43/3/S/38 - Banded obsidian, from Cedar Hill, Naivasha area (collected by Diana Sutherland)
W97, W98 - Melanephelinite lavas +- perovskite, Kisingiri volcanics, Ruri-Mbita road, Lambwe valley.
W614, W615 - Dark partly glassy trachytes?, Naivasha area
W168-W171 - Nepheline-phyric nephelinites, SE of Ngong
W497 - Nepheline phonolite with large phenocrysts, Meru, Tanzania
W583 - Ankaramitic dyke, Narokwe
W656 - Porphyritic nephelinite (same locality as J.W. Gregory), W side of Ologesaile, Enkijiji Hills.
W570 - Phonolite with giant nepheline phenocrysts. Yatta plateau, near Malindi track
W736- Kapiti phonolite. Stony Athi river bridge, Kapiti Plains.
W743 - Nairobi phonolite (trachytic with large phenocrysts), Embakasi Quarry, near the airport, Nairobi
Some cited and dated specimens (eg W656 Fairhead, et al. Nature 1972 - see OHF) Donated by L.A.J. Williams, ex. Lancaster University, Sep. 2005. Mostly collected by him in 1960s? | Subjects: | Geology | Source: | Hunterian Museum | Address: | University of Glasgow,
University Avenue,
G12 8QQ | Creator: | Hunterian Museum and Art Gallery, University of Glasgow | Contributor: | Donated by L.A.J. Williams, ex. Lancaster University, Sep. 2005. Mostly collected by him in 1960s? | Identifier: | H-705 |
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trachyte
volcanic rock with 55=60% silica,…
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