Ngong Hills, Kajiado County, Kenyai
| Regional Level Types | |
|---|---|
| Ngong Hills | Group of Hills |
| Kajiado County | County |
| Kenya | Country |
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Latitude & Longitude (WGS84):
1° 24' 22'' South , 36° 38' 38'' East
Latitude & Longitude (decimal):
Type:
Group of Hills
KΓΆppen climate type:
Mindat Locality ID:
407020
Long-form identifier:
mindat:1:2:407020:0
GUID (UUID V4):
8bf3b06a-a73d-46d0-ab5c-28ac8ef779b2
Ngong Hills, 24 km SW of Nairobi, are the remnants of a volcano that probably had a diameter of about 11 km (Saggerson 1991).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
5 valid minerals.
Rock Types Recorded
Note: data is currently VERY limited. Please bear with us while we work towards adding this information!
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
| β Aegirine-augite Formula: (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6 |
| β Anorthite Formula: Ca(Al2Si2O8) |
| β Anorthite var. Labradorite Formula: (Ca,Na)[Al(Al,Si)Si2O8] |
| β Augite Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| β Augite var. Titanium-bearing Augite Formula: (Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6 |
| β 'Barkevikite' |
| β 'Biotite' Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| β 'Fayalite-Forsterite Series' |
| β 'Feldspar Group' |
| β Magnetite Formula: Fe2+Fe3+2O4 |
| β Nepheline Formula: Na3K(Al4Si4O16) |
| β 'Pyroxene Group' Formula: ADSi2O6 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| β | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
| Group 9 - Silicates | |||
| β | Augite | 9.DA.15 | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| β | var. Titanium-bearing Augite | 9.DA.15 | (Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6 |
| β | Aegirine-augite | 9.DA.20 | (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6 |
| β | Nepheline | 9.FA.05 | Na3K(Al4Si4O16) |
| β | Anorthite | 9.FA.35 | Ca(Al2Si2O8) |
| β | var. Labradorite | 9.FA.35 | (Ca,Na)[Al(Al,Si)Si2O8] |
| Unclassified | |||
| β | 'Biotite' | - | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| β | 'Feldspar Group' | - | |
| β | 'Barkevikite' | - | |
| β | 'Fayalite-Forsterite Series' | - | |
| β | 'Pyroxene Group' | - | ADSi2O6 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | β Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| O | Oxygen | |
| O | β Aegirine-augite | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
| O | β Anorthite | Ca(Al2Si2O8) |
| O | β Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| O | β Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| O | β Anorthite var. Labradorite | (Ca,Na)[Al(Al,Si)Si2O8] |
| O | β Magnetite | Fe2+Fe23+O4 |
| O | β Nepheline | Na3K(Al4Si4O16) |
| O | β Pyroxene Group | ADSi2O6 |
| O | β Augite var. Titanium-bearing Augite | (Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6 |
| F | Fluorine | |
| F | β Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Na | Sodium | |
| Na | β Aegirine-augite | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
| Na | β Anorthite var. Labradorite | (Ca,Na)[Al(Al,Si)Si2O8] |
| Na | β Nepheline | Na3K(Al4Si4O16) |
| Na | β Augite var. Titanium-bearing Augite | (Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6 |
| Mg | Magnesium | |
| Mg | β Aegirine-augite | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
| Mg | β Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Mg | β Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Mg | β Augite var. Titanium-bearing Augite | (Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6 |
| Al | Aluminium | |
| Al | β Aegirine-augite | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
| Al | β Anorthite | Ca(Al2Si2O8) |
| Al | β Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Al | β Anorthite var. Labradorite | (Ca,Na)[Al(Al,Si)Si2O8] |
| Al | β Nepheline | Na3K(Al4Si4O16) |
| Al | β Augite var. Titanium-bearing Augite | (Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6 |
| Si | Silicon | |
| Si | β Aegirine-augite | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
| Si | β Anorthite | Ca(Al2Si2O8) |
| Si | β Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Si | β Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Si | β Anorthite var. Labradorite | (Ca,Na)[Al(Al,Si)Si2O8] |
| Si | β Nepheline | Na3K(Al4Si4O16) |
| Si | β Pyroxene Group | ADSi2O6 |
| Si | β Augite var. Titanium-bearing Augite | (Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6 |
| K | Potassium | |
| K | β Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| K | β Nepheline | Na3K(Al4Si4O16) |
| Ca | Calcium | |
| Ca | β Aegirine-augite | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
| Ca | β Anorthite | Ca(Al2Si2O8) |
| Ca | β Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Ca | β Anorthite var. Labradorite | (Ca,Na)[Al(Al,Si)Si2O8] |
| Ca | β Augite var. Titanium-bearing Augite | (Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6 |
| Ti | Titanium | |
| Ti | β Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Ti | β Augite var. Titanium-bearing Augite | (Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6 |
| Fe | Iron | |
| Fe | β Aegirine-augite | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
| Fe | β Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Fe | β Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Fe | β Magnetite | Fe2+Fe23+O4 |
| Fe | β Augite var. Titanium-bearing Augite | (Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6 |
Geochronology
Mineralization age: Pleistocene : 2.58 Β± 0.17 MaImportant note: This table is based only on rock and mineral ages recorded on mindat.org for this locality and is not necessarily a complete representation of the geochronology, but does give an indication of possible mineralization events relevant to this locality. As more age information is added this table may expand in the future. A break in the table simply indicates a lack of data entered here, not necessarily a break in the geologic sequence. Grey background entries are from different, related, localities.
| Geologic Time | Rocks, Minerals and Events | ||||||
|---|---|---|---|---|---|---|---|
| Phanerozoic | |||||||
| Cenozoic | |||||||
| Quaternary | |||||||
| Pleistocene |
| ||||||
Other Regions, Features and Areas containing this locality
Africa
- East African Rift System (EARS)Zone (Tectonic)
Kenya
- ⭔Rift Valley ProvinceProvince
Somali PlateTectonic Plate
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References
