Hot spring deposits around the eastern and south-eastern shores this alkaline lake.

Located in the Abijatta-Shalla National Park.

Lake Shala is the deepest of the Ethiopian Rift lakes and is approximately 28km x 15km in area.

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Standard Detailed Gallery Strunz Chemical Elements

Mineral List

Mineral list contains entries from the region specified including sub-localities

9 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

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Alphabetical List Tree Diagram

ⓘ Pantelleritic rhyolite

Detailed Mineral List:

ⓘ Aegirine-augite

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

Locality: O'a Caldera, Lake Shala (Lake Shalla), Oromia Region, Ethiopia

Reference: Di Paola, G.M. 1973. The Ethiopian rift valley (between 7º00' and 8º40' lat.north). Bulletin Volcanologique, 36, 517-560. Mohr, P. &. O'Donnell, H. 1983. Geochemistry of obsidians from O'a and related volcanic centres in the Ethiopian Rift Valley. Sinet, Ethiopina Journal of Science, 6, 53-64. Mohr, P., Mitchell, J. G., & Raynolds, R. G. H. (1980). Quaternary volcanism and faulting at O’a Caldera, Central Ethiopian Rift. Bulletin Volcanologique, 43(1), 173-189. doi.org/10.1007/BF02597619

ⓘ Calcite

Formula: CaCO₃

Localities:

Lake Shala (Lake Shalla), Oromia Region, Ethiopia
Aluto-Langano geothermal system, Lake Shala (Lake Shalla), Oromia Region, Ethiopia

Reference: Baumann, A., Förstner, U., Rohde, R. (1975) Lake Shala: Water chemistry, mineralogy and geochemistry of sediments in an Ethiopian Rift lake. Geologische Rundschau, 64(1).

ⓘ 'Chlorite Group'

Localities:

Lake Shala (Lake Shalla), Oromia Region, Ethiopia
Aluto-Langano geothermal system, Lake Shala (Lake Shalla), Oromia Region, Ethiopia

Reference: Baumann, A., Förstner, U., Rohde, R. (1975) Lake Shala: Water chemistry, mineralogy and geochemistry of sediments in an Ethiopian Rift lake. Geologische Rundschau, 64(1).

ⓘ Epidote

Formula: {Ca₂}{Al₂Fe³⁺}(Si₂O₇)(SiO₄)O(OH)

Locality: Aluto-Langano geothermal system, Lake Shala (Lake Shalla), Oromia Region, Ethiopia

Reference: Li, C., Shen, P., Zhao, Y., Li, P., Zhang, L., & Pan, H. (2022). Mineral chemistry of chlorite in different geologic environments and its implications for porphyry Cu±Au±Mo deposits. Ore Geology Reviews, 105112.

ⓘ 'Feldspar Group'

Localities:

Lake Shala (Lake Shalla), Oromia Region, Ethiopia
O'a Caldera, Lake Shala (Lake Shalla), Oromia Region, Ethiopia

Reference: Baumann, A., Förstner, U., Rohde, R. (1975) Lake Shala: Water chemistry, mineralogy and geochemistry of sediments in an Ethiopian Rift lake. Geologische Rundschau, 64(1).

ⓘ 'Garnet Group'

Formula: X₃Z₂(SiO₄)₃

Locality: Aluto-Langano geothermal system, Lake Shala (Lake Shalla), Oromia Region, Ethiopia

ⓘ 'Glass'

Reference: Baumann, A., Förstner, U., Rohde, R. (1975) Lake Shala: Water chemistry, mineralogy and geochemistry of sediments in an Ethiopian Rift lake. Geologische Rundschau, 64(1).

ⓘ Halite

Formula: NaCl

Reference: Alfredo Petrov field observations, 1972.

ⓘ Montmorillonite

Formula: (Na,Ca)_0.33(Al,Mg)₂(Si₄O₁₀)(OH)₂ · nH₂O

Reference: Baumann, A., Förstner, U., Rohde, R. (1975) Lake Shala: Water chemistry, mineralogy and geochemistry of sediments in an Ethiopian Rift lake. Geologische Rundschau, 64(1).

ⓘ Muscovite

Formula: KAl₂(AlSi₃O₁₀)(OH)₂

Localities:

Lake Shala (Lake Shalla), Oromia Region, Ethiopia
Aluto-Langano geothermal system, Lake Shala (Lake Shalla), Oromia Region, Ethiopia

Reference: Baumann, A., Förstner, U., Rohde, R. (1975) Lake Shala: Water chemistry, mineralogy and geochemistry of sediments in an Ethiopian Rift lake. Geologische Rundschau, 64(1).

ⓘ Muscovite var. Illite

Formula: K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂

Reference: Baumann, A., Förstner, U., Rohde, R. (1975) Lake Shala: Water chemistry, mineralogy and geochemistry of sediments in an Ethiopian Rift lake. Geologische Rundschau, 64(1).

ⓘ Muscovite var. Sericite

Formula: KAl₂(AlSi₃O₁₀)(OH)₂

Locality: Aluto-Langano geothermal system, Lake Shala (Lake Shalla), Oromia Region, Ethiopia

ⓘ Natron

Formula: Na₂CO₃ · 10H₂O

Reference: Field collected by Alfredo Petrov, ID by wet chemistry by Dr Fred Riley, chemistry teacher at Ethiopian Adventist College.

ⓘ Opal

Formula: SiO₂ · nH₂O

Reference: Alfredo Petrov field observations, 1972.

ⓘ Quartz

Formula: SiO₂

Localities:

Lake Shala (Lake Shalla), Oromia Region, Ethiopia
Aluto-Langano geothermal system, Lake Shala (Lake Shalla), Oromia Region, Ethiopia

Reference: Baumann, A., Förstner, U., Rohde, R. (1975) Lake Shala: Water chemistry, mineralogy and geochemistry of sediments in an Ethiopian Rift lake. Geologische Rundschau, 64(1).

ⓘ 'Smectite Group'

Formula: A_0.3D_2-3[T₄O₁₀]Z₂ · nH₂O

Reference: Baumann, A., Förstner, U., Rohde, R. (1975) Lake Shala: Water chemistry, mineralogy and geochemistry of sediments in an Ethiopian Rift lake. Geologische Rundschau, 64(1).

ⓘ 'Zeolite Group'

Locality: Aluto-Langano geothermal system, Lake Shala (Lake Shalla), Oromia Region, Ethiopia

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 3 - Halides
ⓘ	Halite	3.AA.20	NaCl
Group 4 - Oxides and Hydroxides
ⓘ	Opal	4.DA.10	SiO₂ · nH₂O
ⓘ	Quartz	4.DA.05	SiO₂
Group 5 - Nitrates and Carbonates
ⓘ	Calcite	5.AB.05	CaCO₃
ⓘ	Natron	5.CB.10	Na₂CO₃ · 10H₂O
Group 9 - Silicates
ⓘ	Aegirine-augite	9.DA.20	(Na_aCa_bFe²⁺_cMg_d)(Fe³⁺_eAl_fFe²⁺_gMg_h)Si₂O₆
ⓘ	Epidote	9.BG.05a	{Ca₂}{Al₂Fe³⁺}(Si₂O₇)(SiO₄)O(OH)
ⓘ	Montmorillonite	9.EC.40	(Na,Ca)_0.33(Al,Mg)₂(Si₄O₁₀)(OH)₂ · nH₂O
ⓘ	Muscovite	9.EC.15	KAl₂(AlSi₃O₁₀)(OH)₂
ⓘ	var. Illite	9.EC.15	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
ⓘ	var. Sericite	9.EC.15	KAl₂(AlSi₃O₁₀)(OH)₂
ⓘ	'Zeolite Group'	9.G0.
Unclassified Minerals, Rocks, etc.
ⓘ	'Chlorite Group'	-
ⓘ	'Feldspar Group'	-
ⓘ	'Garnet Group'	-	X₃Z₂(SiO₄)₃
ⓘ	'Glass'	-
ⓘ	'Smectite Group'	-	A_0.3D_2-3[T₄O₁₀]Z₂ · nH₂O

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Natron	Na₂CO₃ · 10H₂O
H	ⓘ Opal	SiO₂ · nH₂O
H	ⓘ Smectite Group	A_0.3D_2-3[T₄O₁₀]Z₂ · nH₂O
H	ⓘ Muscovite var. Illite	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
H	ⓘ Montmorillonite	(Na,Ca)_0.33(Al,Mg)₂(Si₄O₁₀)(OH)₂ · nH₂O
H	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
H	ⓘ Epidote	{Ca₂}{Al₂Fe³⁺}(Si₂O₇)(SiO₄)O(OH)
H	ⓘ Muscovite var. Sericite	KAl₂(AlSi₃O₁₀)(OH)₂
C	Carbon
C	ⓘ Natron	Na₂CO₃ · 10H₂O
C	ⓘ Calcite	CaCO₃
O	Oxygen
O	ⓘ Natron	Na₂CO₃ · 10H₂O
O	ⓘ Opal	SiO₂ · nH₂O
O	ⓘ Smectite Group	A_0.3D_2-3[T₄O₁₀]Z₂ · nH₂O
O	ⓘ Quartz	SiO₂
O	ⓘ Calcite	CaCO₃
O	ⓘ Muscovite var. Illite	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
O	ⓘ Montmorillonite	(Na,Ca)_0.33(Al,Mg)₂(Si₄O₁₀)(OH)₂ · nH₂O
O	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
O	ⓘ Aegirine-augite	(Na_aCa_bFe_c²⁺Mg_d)(Fe_e³⁺Al_fFe_g²⁺Mg_h)Si₂O₆
O	ⓘ Epidote	{Ca₂}{Al₂Fe³⁺}(Si₂O₇)(SiO₄)O(OH)
O	ⓘ Garnet Group	X₃Z₂(SiO₄)₃
O	ⓘ Muscovite var. Sericite	KAl₂(AlSi₃O₁₀)(OH)₂
Na	Sodium
Na	ⓘ Natron	Na₂CO₃ · 10H₂O
Na	ⓘ Halite	NaCl
Na	ⓘ Montmorillonite	(Na,Ca)_0.33(Al,Mg)₂(Si₄O₁₀)(OH)₂ · nH₂O
Na	ⓘ Aegirine-augite	(Na_aCa_bFe_c²⁺Mg_d)(Fe_e³⁺Al_fFe_g²⁺Mg_h)Si₂O₆
Mg	Magnesium
Mg	ⓘ Montmorillonite	(Na,Ca)_0.33(Al,Mg)₂(Si₄O₁₀)(OH)₂ · nH₂O
Mg	ⓘ Aegirine-augite	(Na_aCa_bFe_c²⁺Mg_d)(Fe_e³⁺Al_fFe_g²⁺Mg_h)Si₂O₆
Al	Aluminium
Al	ⓘ Muscovite var. Illite	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
Al	ⓘ Montmorillonite	(Na,Ca)_0.33(Al,Mg)₂(Si₄O₁₀)(OH)₂ · nH₂O
Al	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Al	ⓘ Aegirine-augite	(Na_aCa_bFe_c²⁺Mg_d)(Fe_e³⁺Al_fFe_g²⁺Mg_h)Si₂O₆
Al	ⓘ Epidote	{Ca₂}{Al₂Fe³⁺}(Si₂O₇)(SiO₄)O(OH)
Al	ⓘ Muscovite var. Sericite	KAl₂(AlSi₃O₁₀)(OH)₂
Si	Silicon
Si	ⓘ Opal	SiO₂ · nH₂O
Si	ⓘ Quartz	SiO₂
Si	ⓘ Muscovite var. Illite	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
Si	ⓘ Montmorillonite	(Na,Ca)_0.33(Al,Mg)₂(Si₄O₁₀)(OH)₂ · nH₂O
Si	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Si	ⓘ Aegirine-augite	(Na_aCa_bFe_c²⁺Mg_d)(Fe_e³⁺Al_fFe_g²⁺Mg_h)Si₂O₆
Si	ⓘ Epidote	{Ca₂}{Al₂Fe³⁺}(Si₂O₇)(SiO₄)O(OH)
Si	ⓘ Garnet Group	X₃Z₂(SiO₄)₃
Si	ⓘ Muscovite var. Sericite	KAl₂(AlSi₃O₁₀)(OH)₂
Cl	Chlorine
Cl	ⓘ Halite	NaCl
K	Potassium
K	ⓘ Muscovite var. Illite	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
K	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
K	ⓘ Muscovite var. Sericite	KAl₂(AlSi₃O₁₀)(OH)₂
Ca	Calcium
Ca	ⓘ Calcite	CaCO₃
Ca	ⓘ Montmorillonite	(Na,Ca)_0.33(Al,Mg)₂(Si₄O₁₀)(OH)₂ · nH₂O
Ca	ⓘ Aegirine-augite	(Na_aCa_bFe_c²⁺Mg_d)(Fe_e³⁺Al_fFe_g²⁺Mg_h)Si₂O₆
Ca	ⓘ Epidote	{Ca₂}{Al₂Fe³⁺}(Si₂O₇)(SiO₄)O(OH)
Fe	Iron
Fe	ⓘ Aegirine-augite	(Na_aCa_bFe_c²⁺Mg_d)(Fe_e³⁺Al_fFe_g²⁺Mg_h)Si₂O₆
Fe	ⓘ Epidote	{Ca₂}{Al₂Fe³⁺}(Si₂O₇)(SiO₄)O(OH)

Fossils

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References

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Baumann, A., Förstner, U., Rohde, R. (1975) Lake Shala: Water chemistry, mineralogy and geochemistry of sediments in an Ethiopian Rift lake. Geologische Rundschau, 64(1).

Other Databases

Wikipedia:	https://en.wikipedia.org/wiki/Lake_Shala
Wikidata ID:	Q509445
GeoNames ID:	328714

External Links

http://en.wikipedia.org/wiki/Lake_Shala

Localities in this Region

Ethiopia

Oromia Region
- Lake Shala (Lake Shalla)
  - Aluto-Langano geothermal system
  - O'a Caldera

Other Regions, Features and Areas that Intersect

Africa

East African Rift System (EARS)Zone (Tectonic)

African PlateTectonic Plate

Somali PlateTectonic Plate

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Detailed Mineral List:

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List of minerals arranged by Strunz 10th Edition classification

List of minerals for each chemical element

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Lake Shala (Lake Shalla), Oromia Region, Ethiopia i
Regional Level Types
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