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- W4387466369 startingPage "463" @default.
- W4387466369 abstract "Lake Magadi, a hypersaline alkaline lake, occupies a hydrological sump (~600 m) in volcanic terrain (mainly trachyte) in the axial graben of the southern Kenya Rift. Saline alkaline Lake Natron, an important flamingo nesting site, lies ~25 km to the south with the small Nasikie Engida (Little Magadi) to the north. All three lakes are fed by shoreline hot springs and ephemeral streams, but Lake Natron receives significant fluvial inflow from the Ewaso Ngiro River. The Magadi and Natron saline pans are seasonally flooded and periodically dry up, but Nasikie Engida is perennial, maintained by hydrothermal inflow. The Na+–HCO3−–Cl− spring waters and runoff undergo evapoconcentration, producing shallow brines that precipitate trona and nahcolite. Magmatic CO2 contributes to their precipitation. The high pH (>10.5) increases the solubility of silica, which precipitates as opal-A, gels, and sodium silicates (magadiite) that are precursors of chert. During the late Pleistocene-early Holocene, the lakes were united and fresh with fish (High Magadi Beds), but later separated to produce a thick sequence of trona with interbedded mud at Lake Magadi." @default.
- W4387466369 created "2023-10-10" @default.
- W4387466369 creator A5056527653 @default.
- W4387466369 creator A5074754470 @default.
- W4387466369 date "2023-01-01" @default.
- W4387466369 modified "2023-10-11" @default.
- W4387466369 title "Lake Magadi and Nasikie Engida" @default.
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