Amygdaloidal basalts exposed on the northern slopes of a series of large, E-W-trending ridges contain abundant, zeolite-filled veins and cavities. These zeolites occur as distinctive fibrous, cubic, or botryoidal crystals. The veins are up to 10 cm in width and 3 m in length, and the cavities are well developed, with zeolite veinlets forming along an orthogonal joint system. Calcite is prevalent in areas with extensive zeolitization within these highly vesicular lavas.

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Standard Detailed Gallery Strunz Chemical Elements

Mineral List

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

ⓘ Basalt

Detailed Mineral List:

ⓘ Analcime

Formula: Na(AlSi₂O₆) · H₂O

References:

Suliman, T.A.; Hong, Hanlie; Hassan, M.A.; Yong, Li; Liu, Chen; Yunusa, Adamu; Salim, Atif; Algeo, Thomas J. (2025) Constraints of groundwater and hydrothermal activity on formation of zeolites in alkaline basalts (Gedaref, eastern Sudan). Ore Geology Reviews, 185. 106784 doi:10.1016/j.oregeorev.2025.106784

ⓘ Calcite

Formula: CaCO₃

References:

ⓘ Chabazite-Ca

Formula: (Ca,K₂,Na₂)₂[Al₂Si₄O₁₂]₂ · 12H₂O

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ⓘ 'Chlorite Group'

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ⓘ 'Clay minerals'

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ⓘ Mesolite

Formula: Na₂Ca₂Si₉Al₆O₃₀ · 8H₂O

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ⓘ Natrolite

Formula: Na₂Al₂Si₃O₁₀ · 2H₂O

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ⓘ Nontronite

Formula: Na_0.3Fe₂((Si,Al)₄O₁₀)(OH)₂ · nH₂O

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ⓘ 'Phyllosilicate'

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ⓘ Quartz

Formula: SiO₂

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ⓘ Quartz var. Agate

Formula: SiO₂

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ⓘ 'Smectite Group'

Formula: A_0.3D_2-3[T₄O₁₀]Z₂ · nH₂O

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ⓘ Stilbite-Ca

Formula: NaCa₄(Si₂₇Al₉)O₇₂ · 28H₂O

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ⓘ Thomsonite-Ca

Formula: NaCa₂[Al₅Si₅O₂₀] · 6H₂O

References:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘ	Quartz var. Agate	4.DA.05	SiO₂
ⓘ		4.DA.05	SiO₂
Group 5 - Nitrates and Carbonates
ⓘ	Calcite	5.AB.05	CaCO₃
Group 9 - Silicates
ⓘ	Nontronite	9.EC.40	Na_0.3Fe₂((Si,Al)₄O₁₀)(OH)₂ · nH₂O
ⓘ	Mesolite	9.GA.05	Na₂Ca₂Si₉Al₆O₃₀ · 8H₂O
ⓘ	Natrolite	9.GA.05	Na₂Al₂Si₃O₁₀ · 2H₂O
ⓘ	Thomsonite-Ca	9.GA.10	NaCa₂[Al₅Si₅O₂₀] · 6H₂O
ⓘ	Analcime	9.GB.05	Na(AlSi₂O₆) · H₂O
ⓘ	Chabazite-Ca	9.GD.10	(Ca,K₂,Na₂)₂[Al₂Si₄O₁₂]₂ · 12H₂O
ⓘ	Stilbite-Ca	9.GE.10	NaCa₄(Si₂₇Al₉)O₇₂ · 28H₂O
Unclassified
ⓘ	'Chlorite Group'	-
ⓘ	'Clay minerals'	-
ⓘ	'Smectite Group'	-	A_0.3D_2-3[T₄O₁₀]Z₂ · nH₂O
ⓘ	'Phyllosilicate'	-

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Analcime	Na(AlSi₂O₆) · H₂O
H	ⓘ Mesolite	Na₂Ca₂Si₉Al₆O₃₀ · 8H₂O
H	ⓘ Nontronite	Na_0.3Fe₂((Si,Al)₄O₁₀)(OH)₂ · nH₂O
H	ⓘ Natrolite	Na₂Al₂Si₃O₁₀ · 2H₂O
H	ⓘ Thomsonite-Ca	NaCa₂[Al₅Si₅O₂₀] · 6H₂O
H	ⓘ Chabazite-Ca	(Ca,K₂,Na₂)₂[Al₂Si₄O₁₂]₂ · 12H₂O
H	ⓘ Stilbite-Ca	NaCa₄(Si₂₇Al₉)O₇₂ · 28H₂O
H	ⓘ Smectite Group	A_0.3D_2-3[T₄O₁₀]Z₂ · nH₂O
C	Carbon
C	ⓘ Calcite	CaCO₃
O	Oxygen
O	ⓘ Quartz var. Agate	SiO₂
O	ⓘ Analcime	Na(AlSi₂O₆) · H₂O
O	ⓘ Calcite	CaCO₃
O	ⓘ Mesolite	Na₂Ca₂Si₉Al₆O₃₀ · 8H₂O
O	ⓘ Nontronite	Na_0.3Fe₂((Si,Al)₄O₁₀)(OH)₂ · nH₂O
O	ⓘ Natrolite	Na₂Al₂Si₃O₁₀ · 2H₂O
O	ⓘ Quartz	SiO₂
O	ⓘ Thomsonite-Ca	NaCa₂[Al₅Si₅O₂₀] · 6H₂O
O	ⓘ Chabazite-Ca	(Ca,K₂,Na₂)₂[Al₂Si₄O₁₂]₂ · 12H₂O
O	ⓘ Stilbite-Ca	NaCa₄(Si₂₇Al₉)O₇₂ · 28H₂O
O	ⓘ Smectite Group	A_0.3D_2-3[T₄O₁₀]Z₂ · nH₂O
Na	Sodium
Na	ⓘ Analcime	Na(AlSi₂O₆) · H₂O
Na	ⓘ Mesolite	Na₂Ca₂Si₉Al₆O₃₀ · 8H₂O
Na	ⓘ Nontronite	Na_0.3Fe₂((Si,Al)₄O₁₀)(OH)₂ · nH₂O
Na	ⓘ Natrolite	Na₂Al₂Si₃O₁₀ · 2H₂O
Na	ⓘ Thomsonite-Ca	NaCa₂[Al₅Si₅O₂₀] · 6H₂O
Na	ⓘ Chabazite-Ca	(Ca,K₂,Na₂)₂[Al₂Si₄O₁₂]₂ · 12H₂O
Na	ⓘ Stilbite-Ca	NaCa₄(Si₂₇Al₉)O₇₂ · 28H₂O
Al	Aluminium
Al	ⓘ Analcime	Na(AlSi₂O₆) · H₂O
Al	ⓘ Mesolite	Na₂Ca₂Si₉Al₆O₃₀ · 8H₂O
Al	ⓘ Nontronite	Na_0.3Fe₂((Si,Al)₄O₁₀)(OH)₂ · nH₂O
Al	ⓘ Natrolite	Na₂Al₂Si₃O₁₀ · 2H₂O
Al	ⓘ Thomsonite-Ca	NaCa₂[Al₅Si₅O₂₀] · 6H₂O
Al	ⓘ Chabazite-Ca	(Ca,K₂,Na₂)₂[Al₂Si₄O₁₂]₂ · 12H₂O
Al	ⓘ Stilbite-Ca	NaCa₄(Si₂₇Al₉)O₇₂ · 28H₂O
Si	Silicon
Si	ⓘ Quartz var. Agate	SiO₂
Si	ⓘ Analcime	Na(AlSi₂O₆) · H₂O
Si	ⓘ Mesolite	Na₂Ca₂Si₉Al₆O₃₀ · 8H₂O
Si	ⓘ Nontronite	Na_0.3Fe₂((Si,Al)₄O₁₀)(OH)₂ · nH₂O
Si	ⓘ Natrolite	Na₂Al₂Si₃O₁₀ · 2H₂O
Si	ⓘ Quartz	SiO₂
Si	ⓘ Thomsonite-Ca	NaCa₂[Al₅Si₅O₂₀] · 6H₂O
Si	ⓘ Chabazite-Ca	(Ca,K₂,Na₂)₂[Al₂Si₄O₁₂]₂ · 12H₂O
Si	ⓘ Stilbite-Ca	NaCa₄(Si₂₇Al₉)O₇₂ · 28H₂O
K	Potassium
K	ⓘ Chabazite-Ca	(Ca,K₂,Na₂)₂[Al₂Si₄O₁₂]₂ · 12H₂O
Ca	Calcium
Ca	ⓘ Calcite	CaCO₃
Ca	ⓘ Mesolite	Na₂Ca₂Si₉Al₆O₃₀ · 8H₂O
Ca	ⓘ Thomsonite-Ca	NaCa₂[Al₅Si₅O₂₀] · 6H₂O
Ca	ⓘ Chabazite-Ca	(Ca,K₂,Na₂)₂[Al₂Si₄O₁₂]₂ · 12H₂O
Ca	ⓘ Stilbite-Ca	NaCa₄(Si₂₇Al₉)O₇₂ · 28H₂O
Fe	Iron
Fe	ⓘ Nontronite	Na_0.3Fe₂((Si,Al)₄O₁₀)(OH)₂ · nH₂O

Other Regions, Features and Areas containing this locality

AfricaContinent

African PlateTectonic Plate

Atbara Rift basinBasin

Arabian Plate

Arabian-Nubian Shield
- Haya TerraneVolcanic Arc

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References

[1]Suliman, T.A.; Hong, Hanlie; Hassan, M.A.; Yong, Li; Liu, Chen; Yunusa, Adamu; Salim, Atif; Algeo, Thomas J. (2025) Constraints of groundwater and hydrothermal activity on formation of zeolites in alkaline basalts (Gedaref, eastern Sudan). Ore Geology Reviews, 185. 106784 doi:10.1016/j.oregeorev.2025.106784

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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

Unnamed zeolite occurrence, Al Qadarif, Sudan i
Regional Level Types
Unnamed zeolite occurrence Occurrence
Al Qadarif State
Sudan Country