Baker, B. H., Mitchell, J. G., & Williams, L. A. J. (1988). Stratigraphy, geochronology and volcano-tectonic evolution of the Kedong–Naivasha–Kinangop region, Gregory Rift Valley, Kenya. Journal of the Geological Society, 145(1), 107-116. doi.org/10.1144/gsjgs.145.1.0107

Köppen climate type:

Cfb : Temperate oceanic climate

Nearest Settlements:

Place	Population	Distance
Ngong	9,519 (2018)	19.0km
Kikuyu	3,953 (2018)	29.6km
Nairobi	2,750,547 (2014)	35.4km
Pumwani	29,616 (2013)	38.2km
Limuru	6,317 (2018)	43.4km

Mindat Locality ID:

407021

Long-form identifier:

mindat:1:2:407021:7

GUID (UUID V4):

66d61c27-8adb-4fff-af35-35c726e7a532

Volcano is located southwest of Ngong Hills, Kajiado County, Kenya and extends from the southwest corner of the Nairobi Volcanic area, Nairobi County, Kenya into the Kajiado area to the south.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

8 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 Diagram

ⓘ Phonolite

ⓘ Tephrite

ⓘ Trachyte

Detailed Mineral List:

ⓘ Aegirine-augite

Formula: (Na_aCa_bFe²⁺_cMg_d)(Fe³⁺_eAl_fFe²⁺_gMg_h)Si₂O₆

References:

Matheson, F. J. (1966). Geology of the Kajiado area. Geological Survey of Kenya Report, 70.

Saggerson, E. P. (1991). Geology of the Nairobi area (No. 98). Mines & Geological Department.

ⓘ Aenigmatite

Formula: Na₄[Fe²⁺₁₀Ti₂]O₄[Si₁₂O₃₆]

References:

Matheson, F. J. (1966). Geology of the Kajiado area. Geological Survey of Kenya Report, 70.

Saggerson, E. P. (1991). Geology of the Nairobi area (No. 98). Mines & Geological Department.

ⓘ Albite

Formula: Na(AlSi₃O₈)

References:

Matheson, F. J. (1966). Geology of the Kajiado area. Geological Survey of Kenya Report, 70.

Saggerson, E. P. (1991). Geology of the Nairobi area (No. 98). Mines & Geological Department.

ⓘ Albite var. Anorthoclase

Formula: (Na,K)AlSi₃O₈

References:

Matheson, F. J. (1966). Geology of the Kajiado area. Geological Survey of Kenya Report, 70.

Saggerson, E. P. (1991). Geology of the Nairobi area (No. 98). Mines & Geological Department.

ⓘ Albite var. Oligoclase

Formula: (Na,Ca)[Al(Si,Al)Si₂O₈]

References:

Matheson, F. J. (1966). Geology of the Kajiado area. Geological Survey of Kenya Report, 70.

Saggerson, E. P. (1991). Geology of the Nairobi area (No. 98). Mines & Geological Department.

ⓘ 'Alkali Feldspar'

References:

Matheson, F. J. (1966). Geology of the Kajiado area. Geological Survey of Kenya Report, 70.

Saggerson, E. P. (1991). Geology of the Nairobi area (No. 98). Mines & Geological Department.

ⓘ Augite

Formula: (Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆

References:

Matheson, F. J. (1966). Geology of the Kajiado area. Geological Survey of Kenya Report, 70.

Saggerson, E. P. (1991). Geology of the Nairobi area (No. 98). Mines & Geological Department.

ⓘ Augite var. Titanium-bearing Augite

Formula: (Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)₂O₆

References:

Matheson, F. J. (1966). Geology of the Kajiado area. Geological Survey of Kenya Report, 70.

Saggerson, E. P. (1991). Geology of the Nairobi area (No. 98). Mines & Geological Department.

ⓘ 'Barkevikite'

References:

Matheson, F. J. (1966). Geology of the Kajiado area. Geological Survey of Kenya Report, 70.

Saggerson, E. P. (1991). Geology of the Nairobi area (No. 98). Mines & Geological Department.

ⓘ Katophorite

Formula: {Na}{CaNa}{Mg₄Al}[(AlSi₇)O₂₂](OH)₂

References:

Matheson, F. J. (1966). Geology of the Kajiado area. Geological Survey of Kenya Report, 70.

Saggerson, E. P. (1991). Geology of the Nairobi area (No. 98). Mines & Geological Department.

ⓘ Magnetite

Formula: Fe²⁺Fe³⁺₂O₄

References:

Matheson, F. J. (1966). Geology of the Kajiado area. Geological Survey of Kenya Report, 70.

Saggerson, E. P. (1991). Geology of the Nairobi area (No. 98). Mines & Geological Department.

ⓘ Nepheline

Formula: Na₃K(Al₄Si₄O₁₆)

References:

Matheson, F. J. (1966). Geology of the Kajiado area. Geological Survey of Kenya Report, 70.

Saggerson, E. P. (1991). Geology of the Nairobi area (No. 98). Mines & Geological Department.

ⓘ Titanite

Formula: CaTi(SiO₄)O

References:

Matheson, F. J. (1966). Geology of the Kajiado area. Geological Survey of Kenya Report, 70.

Saggerson, E. P. (1991). Geology of the Nairobi area (No. 98). Mines & Geological Department.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘ	Magnetite	4.BB.05	Fe²⁺Fe³⁺₂O₄
Group 9 - Silicates
ⓘ	Titanite	9.AG.15	CaTi(SiO₄)O
ⓘ	Augite	9.DA.15	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
ⓘ	var. Titanium-bearing Augite	9.DA.15	(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)₂O₆
ⓘ	Aegirine-augite	9.DA.20	(Na_aCa_bFe²⁺_cMg_d)(Fe³⁺_eAl_fFe²⁺_gMg_h)Si₂O₆
ⓘ	Katophorite	9.DE.20	{Na}{CaNa}{Mg₄Al}[(AlSi₇)O₂₂](OH)₂
ⓘ	Aenigmatite	9.DH.40	Na₄[Fe²⁺₁₀Ti₂]O₄[Si₁₂O₃₆]
ⓘ	Nepheline	9.FA.05	Na₃K(Al₄Si₄O₁₆)
ⓘ	Albite	9.FA.35	Na(AlSi₃O₈)
ⓘ	var. Anorthoclase	9.FA.35	(Na,K)AlSi₃O₈
ⓘ	var. Oligoclase	9.FA.35	(Na,Ca)[Al(Si,Al)Si₂O₈]
Unclassified
ⓘ	'Alkali Feldspar'	-
ⓘ	'Barkevikite'	-

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Katophorite	{Na}{CaNa}{Mg₄Al}[(AlSi₇)O₂₂](OH)₂
O	Oxygen
O	ⓘ Aegirine-augite	(Na_aCa_bFe_c²⁺Mg_d)(Fe_e³⁺Al_fFe_g²⁺Mg_h)Si₂O₆
O	ⓘ Aenigmatite	Na₄[Fe₁₀²⁺Ti₂]O₄[Si₁₂O₃₆]
O	ⓘ Albite	Na(AlSi₃O₈)
O	ⓘ Albite var. Anorthoclase	(Na,K)AlSi₃O₈
O	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
O	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
O	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
O	ⓘ Albite var. Oligoclase	(Na,Ca)[Al(Si,Al)Si₂O₈]
O	ⓘ Titanite	CaTi(SiO₄)O
O	ⓘ Katophorite	{Na}{CaNa}{Mg₄Al}[(AlSi₇)O₂₂](OH)₂
O	ⓘ Augite var. Titanium-bearing Augite	(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)₂O₆
Na	Sodium
Na	ⓘ Aegirine-augite	(Na_aCa_bFe_c²⁺Mg_d)(Fe_e³⁺Al_fFe_g²⁺Mg_h)Si₂O₆
Na	ⓘ Aenigmatite	Na₄[Fe₁₀²⁺Ti₂]O₄[Si₁₂O₃₆]
Na	ⓘ Albite	Na(AlSi₃O₈)
Na	ⓘ Albite var. Anorthoclase	(Na,K)AlSi₃O₈
Na	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
Na	ⓘ Albite var. Oligoclase	(Na,Ca)[Al(Si,Al)Si₂O₈]
Na	ⓘ Katophorite	{Na}{CaNa}{Mg₄Al}[(AlSi₇)O₂₂](OH)₂
Na	ⓘ Augite var. Titanium-bearing Augite	(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)₂O₆
Mg	Magnesium
Mg	ⓘ Aegirine-augite	(Na_aCa_bFe_c²⁺Mg_d)(Fe_e³⁺Al_fFe_g²⁺Mg_h)Si₂O₆
Mg	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Mg	ⓘ Katophorite	{Na}{CaNa}{Mg₄Al}[(AlSi₇)O₂₂](OH)₂
Mg	ⓘ Augite var. Titanium-bearing Augite	(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)₂O₆
Al	Aluminium
Al	ⓘ Aegirine-augite	(Na_aCa_bFe_c²⁺Mg_d)(Fe_e³⁺Al_fFe_g²⁺Mg_h)Si₂O₆
Al	ⓘ Albite	Na(AlSi₃O₈)
Al	ⓘ Albite var. Anorthoclase	(Na,K)AlSi₃O₈
Al	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
Al	ⓘ Albite var. Oligoclase	(Na,Ca)[Al(Si,Al)Si₂O₈]
Al	ⓘ Katophorite	{Na}{CaNa}{Mg₄Al}[(AlSi₇)O₂₂](OH)₂
Al	ⓘ Augite var. Titanium-bearing Augite	(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)₂O₆
Si	Silicon
Si	ⓘ Aegirine-augite	(Na_aCa_bFe_c²⁺Mg_d)(Fe_e³⁺Al_fFe_g²⁺Mg_h)Si₂O₆
Si	ⓘ Aenigmatite	Na₄[Fe₁₀²⁺Ti₂]O₄[Si₁₂O₃₆]
Si	ⓘ Albite	Na(AlSi₃O₈)
Si	ⓘ Albite var. Anorthoclase	(Na,K)AlSi₃O₈
Si	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Si	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
Si	ⓘ Albite var. Oligoclase	(Na,Ca)[Al(Si,Al)Si₂O₈]
Si	ⓘ Titanite	CaTi(SiO₄)O
Si	ⓘ Katophorite	{Na}{CaNa}{Mg₄Al}[(AlSi₇)O₂₂](OH)₂
Si	ⓘ Augite var. Titanium-bearing Augite	(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)₂O₆
K	Potassium
K	ⓘ Albite var. Anorthoclase	(Na,K)AlSi₃O₈
K	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
Ca	Calcium
Ca	ⓘ Aegirine-augite	(Na_aCa_bFe_c²⁺Mg_d)(Fe_e³⁺Al_fFe_g²⁺Mg_h)Si₂O₆
Ca	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Ca	ⓘ Albite var. Oligoclase	(Na,Ca)[Al(Si,Al)Si₂O₈]
Ca	ⓘ Titanite	CaTi(SiO₄)O
Ca	ⓘ Katophorite	{Na}{CaNa}{Mg₄Al}[(AlSi₇)O₂₂](OH)₂
Ca	ⓘ Augite var. Titanium-bearing Augite	(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)₂O₆
Ti	Titanium
Ti	ⓘ Aenigmatite	Na₄[Fe₁₀²⁺Ti₂]O₄[Si₁₂O₃₆]
Ti	ⓘ Titanite	CaTi(SiO₄)O
Ti	ⓘ Augite var. Titanium-bearing Augite	(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)₂O₆
Fe	Iron
Fe	ⓘ Aegirine-augite	(Na_aCa_bFe_c²⁺Mg_d)(Fe_e³⁺Al_fFe_g²⁺Mg_h)Si₂O₆
Fe	ⓘ Aenigmatite	Na₄[Fe₁₀²⁺Ti₂]O₄[Si₁₂O₃₆]
Fe	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Fe	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
Fe	ⓘ Augite var. Titanium-bearing Augite	(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)₂O₆

Other Regions, Features and Areas containing this locality

Africa

East African Rift System (EARS)Zone (Tectonic)

African Plate

Eyasi-Wembere-South Gregory Rift basinBasin

Kenya

⭔Rift Valley ProvinceProvince

Somali PlateTectonic Plate

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Matheson, F. J. (1966). Geology of the Kajiado area. Geological Survey of Kenya Report, 70.

Saggerson, E. P. (1991). Geology of the Nairobi area (No. 98). Mines & Geological Department.

Woolley, A. R. (2001). Alkaline rocks and carbonatites of the world. Part 3: Africa. Geological Society. Natural History Museum, London, p. 134.

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Ol Esayeiti Volcano, Kajiado County, KenyaiRegional Level TypesOl Esayeiti VolcanoVolcano Kajiado CountyCounty KenyaCountry function showexplain() { $("#locexplain").toggle(); if (typeof movemap === "function") movemap(); }

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Mineral List

Rock Types Recorded

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Detailed Mineral List:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

List of minerals for each chemical element

Other Regions, Features and Areas containing this locality

References

Ol Esayeiti Volcano, Kajiado County, Kenya i
Regional Level Types
Ol Esayeiti Volcano Volcano
Kajiado County County
Kenya Country