Zeolites are found in a talus slope of a quarry at La Garita. Breccia cavities, to 15 cm across, are commonly lined with bladed thomsonite, chabazite, calcite, and other minerals.
Quarry near the La Garita bridge.

Select Mineral List Type

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!

Select Rock List Type

Alphabetical List Tree Diagram

ⓘ Basalt

Detailed Mineral List:

ⓘ Analcime

Formula: Na(AlSi₂O₆) · H₂O

ⓘ Anorthite

Formula: Ca(Al₂Si₂O₈)

ⓘ Anorthite var. Bytownite

Formula: (Ca,Na)[Al(Al,Si)Si₂O₈]

ⓘ Anorthite var. Labradorite

Formula: (Ca,Na)[Al(Al,Si)Si₂O₈]

ⓘ 'Apophyllite Group'

Formula: AB₄[Si₈O₂₂]X · 8H₂O

References:

Zeledón, L. A. (2004). Zeolitas del Valle Central de Costa Rica y sus alrededores. Revista Geológica de América Central. 31: 67-80

ⓘ Augite

Formula: (Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆

ⓘ 'Biotite'

Formula: K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂

ⓘ Calcite

Formula: CaCO₃

References:

Micro Probe Vol 7 No. 7 Spring 1993

Tschernich, Rudy W. (1992) Zeolites of the World. Geoscience Press, Inc., Phoenix, Arizona. 567pp.

Zeledón, L. A. (2004). Zeolitas del Valle Central de Costa Rica y sus alrededores. Revista Geológica de América Central. 31: 67-80

ⓘ 'Chabazite'

Habit: twinned crystals to 3mm in diameter

Colour: colorless

References:

Micro Probe Vol 7 No. 7 Spring 1993

Tschernich, Rudy W. (1992) Zeolites of the World. Geoscience Press, Inc., Phoenix, Arizona. 567pp.

Zeledón, L. A. (2004). Zeolitas del Valle Central de Costa Rica y sus alrededores. Revista Geológica de América Central. 31: 67-80

ⓘ 'Chabazite var. Phacolite'

References:

Zeledón, L. A. (2004). Zeolitas del Valle Central de Costa Rica y sus alrededores. Revista Geológica de América Central. 31: 67-80

ⓘ 'Fayalite-Forsterite Series'

ⓘ Fluorapophyllite-(K)

Formula: KCa₄(Si₈O₂₀)(F,OH) · 8H₂O

References:

Micro Probe Volume VII Number 7 Spring 1993

ⓘ Gyrolite

Formula: NaCa₁₆Si₂₃AlO₆₀(OH)₈ · 14H₂O

References:

Micro Probe Volume VII Number 7 Spring 1993

Zeledón, L. A. (2004). Zeolitas del Valle Central de Costa Rica y sus alrededores. Revista Geológica de América Central. 31: 67-80

ⓘ Mesolite

Formula: Na₂Ca₂Si₉Al₆O₃₀ · 8H₂O

References:

Micro Probe Volume VII Number 7 Spring 1993

Zeledón, L. A. (2004). Zeolitas del Valle Central de Costa Rica y sus alrededores. Revista Geológica de América Central. 31: 67-80

ⓘ Mordenite

Formula: (Na₂,Ca,K₂)₄(Al₈Si₄₀)O₉₆ · 28H₂O

References:

Zeledón, L. A. (2004). Zeolitas del Valle Central de Costa Rica y sus alrededores. Revista Geológica de América Central. 31: 67-80

ⓘ 'Plagioclase'

Formula: (Na,Ca)[(Si,Al)AlSi₂]O₈

ⓘ Thomsonite-Ca

Formula: NaCa₂[Al₅Si₅O₂₀] · 6H₂O

Habit: radiating fan like groups of thin bladed crystals up to 4mm in diameter; Radial groups of prisms with the forms {100}, {010}, {001} and {110}

Colour: colorless to gray

References:

Micro Probe Vol 7 No. 7 Spring 1993

Tschernich, Rudy W. (1992) Zeolites of the World. Geoscience Press, Inc., Phoenix, Arizona. 567pp.

ⓘ 'Thomsonite Subgroup'

References:

Zeledón, L. A. (2004). Zeolitas del Valle Central de Costa Rica y sus alrededores. Revista Geológica de América Central. 31: 67-80

Gallery:

NaCa₂[Al₅Si₅O₂₀] · 6H₂Oⓘ Thomsonite-Ca

List of minerals arranged by Strunz 10th Edition classification

Group 5 - Nitrates and Carbonates
ⓘ	Calcite	5.AB.05	CaCO₃
Group 9 - Silicates
ⓘ	Augite	9.DA.15	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
ⓘ	Fluorapophyllite-(K)	9.EA.15	KCa₄(Si₈O₂₀)(F,OH) · 8H₂O
ⓘ	Gyrolite	9.EE.30	NaCa₁₆Si₂₃AlO₆₀(OH)₈ · 14H₂O
ⓘ	Anorthite	9.FA.35	Ca(Al₂Si₂O₈)
ⓘ	var. Bytownite	9.FA.35	(Ca,Na)[Al(Al,Si)Si₂O₈]
ⓘ	var. Labradorite	9.FA.35	(Ca,Na)[Al(Al,Si)Si₂O₈]
ⓘ	Mesolite	9.GA.05	Na₂Ca₂Si₉Al₆O₃₀ · 8H₂O
ⓘ	Thomsonite-Ca	9.GA.10	NaCa₂[Al₅Si₅O₂₀] · 6H₂O
ⓘ	Analcime	9.GB.05	Na(AlSi₂O₆) · H₂O
ⓘ	Mordenite	9.GD.35	(Na₂,Ca,K₂)₄(Al₈Si₄₀)O₉₆ · 28H₂O
Unclassified
ⓘ	'Chabazite'	-
ⓘ	'Biotite'	-	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
ⓘ	'Apophyllite Group'	-	AB₄[Si₈O₂₂]X · 8H₂O
ⓘ	'Fayalite-Forsterite Series'	-
ⓘ	'Plagioclase'	-	(Na,Ca)[(Si,Al)AlSi₂]O₈
ⓘ	'Chabazite var. Phacolite'	-
ⓘ	'Thomsonite Subgroup'	-

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Analcime	Na(AlSi₂O₆) · H₂O
H	ⓘ Apophyllite Group	AB₄[Si₈O₂₂]X · 8H₂O
H	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
H	ⓘ Fluorapophyllite-(K)	KCa₄(Si₈O₂₀)(F,OH) · 8H₂O
H	ⓘ Gyrolite	NaCa₁₆Si₂₃AlO₆₀(OH)₈ · 14H₂O
H	ⓘ Mesolite	Na₂Ca₂Si₉Al₆O₃₀ · 8H₂O
H	ⓘ Mordenite	(Na₂,Ca,K₂)₄(Al₈Si₄₀)O₉₆ · 28H₂O
H	ⓘ Thomsonite-Ca	NaCa₂[Al₅Si₅O₂₀] · 6H₂O
C	Carbon
C	ⓘ Calcite	CaCO₃
O	Oxygen
O	ⓘ Analcime	Na(AlSi₂O₆) · H₂O
O	ⓘ Anorthite	Ca(Al₂Si₂O₈)
O	ⓘ Apophyllite Group	AB₄[Si₈O₂₂]X · 8H₂O
O	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
O	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
O	ⓘ Anorthite var. Bytownite	(Ca,Na)[Al(Al,Si)Si₂O₈]
O	ⓘ Calcite	CaCO₃
O	ⓘ Fluorapophyllite-(K)	KCa₄(Si₈O₂₀)(F,OH) · 8H₂O
O	ⓘ Gyrolite	NaCa₁₆Si₂₃AlO₆₀(OH)₈ · 14H₂O
O	ⓘ Anorthite var. Labradorite	(Ca,Na)[Al(Al,Si)Si₂O₈]
O	ⓘ Mesolite	Na₂Ca₂Si₉Al₆O₃₀ · 8H₂O
O	ⓘ Mordenite	(Na₂,Ca,K₂)₄(Al₈Si₄₀)O₉₆ · 28H₂O
O	ⓘ Thomsonite-Ca	NaCa₂[Al₅Si₅O₂₀] · 6H₂O
O	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
F	Fluorine
F	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
F	ⓘ Fluorapophyllite-(K)	KCa₄(Si₈O₂₀)(F,OH) · 8H₂O
Na	Sodium
Na	ⓘ Analcime	Na(AlSi₂O₆) · H₂O
Na	ⓘ Anorthite var. Bytownite	(Ca,Na)[Al(Al,Si)Si₂O₈]
Na	ⓘ Gyrolite	NaCa₁₆Si₂₃AlO₆₀(OH)₈ · 14H₂O
Na	ⓘ Anorthite var. Labradorite	(Ca,Na)[Al(Al,Si)Si₂O₈]
Na	ⓘ Mesolite	Na₂Ca₂Si₉Al₆O₃₀ · 8H₂O
Na	ⓘ Mordenite	(Na₂,Ca,K₂)₄(Al₈Si₄₀)O₉₆ · 28H₂O
Na	ⓘ Thomsonite-Ca	NaCa₂[Al₅Si₅O₂₀] · 6H₂O
Na	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Mg	Magnesium
Mg	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Mg	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Al	Aluminium
Al	ⓘ Analcime	Na(AlSi₂O₆) · H₂O
Al	ⓘ Anorthite	Ca(Al₂Si₂O₈)
Al	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Al	ⓘ Anorthite var. Bytownite	(Ca,Na)[Al(Al,Si)Si₂O₈]
Al	ⓘ Gyrolite	NaCa₁₆Si₂₃AlO₆₀(OH)₈ · 14H₂O
Al	ⓘ Anorthite var. Labradorite	(Ca,Na)[Al(Al,Si)Si₂O₈]
Al	ⓘ Mesolite	Na₂Ca₂Si₉Al₆O₃₀ · 8H₂O
Al	ⓘ Mordenite	(Na₂,Ca,K₂)₄(Al₈Si₄₀)O₉₆ · 28H₂O
Al	ⓘ Thomsonite-Ca	NaCa₂[Al₅Si₅O₂₀] · 6H₂O
Al	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Si	Silicon
Si	ⓘ Analcime	Na(AlSi₂O₆) · H₂O
Si	ⓘ Anorthite	Ca(Al₂Si₂O₈)
Si	ⓘ Apophyllite Group	AB₄[Si₈O₂₂]X · 8H₂O
Si	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Si	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Si	ⓘ Anorthite var. Bytownite	(Ca,Na)[Al(Al,Si)Si₂O₈]
Si	ⓘ Fluorapophyllite-(K)	KCa₄(Si₈O₂₀)(F,OH) · 8H₂O
Si	ⓘ Gyrolite	NaCa₁₆Si₂₃AlO₆₀(OH)₈ · 14H₂O
Si	ⓘ Anorthite var. Labradorite	(Ca,Na)[Al(Al,Si)Si₂O₈]
Si	ⓘ Mesolite	Na₂Ca₂Si₉Al₆O₃₀ · 8H₂O
Si	ⓘ Mordenite	(Na₂,Ca,K₂)₄(Al₈Si₄₀)O₉₆ · 28H₂O
Si	ⓘ Thomsonite-Ca	NaCa₂[Al₅Si₅O₂₀] · 6H₂O
Si	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
K	Potassium
K	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
K	ⓘ Fluorapophyllite-(K)	KCa₄(Si₈O₂₀)(F,OH) · 8H₂O
K	ⓘ Mordenite	(Na₂,Ca,K₂)₄(Al₈Si₄₀)O₉₆ · 28H₂O
Ca	Calcium
Ca	ⓘ Anorthite	Ca(Al₂Si₂O₈)
Ca	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Ca	ⓘ Anorthite var. Bytownite	(Ca,Na)[Al(Al,Si)Si₂O₈]
Ca	ⓘ Calcite	CaCO₃
Ca	ⓘ Fluorapophyllite-(K)	KCa₄(Si₈O₂₀)(F,OH) · 8H₂O
Ca	ⓘ Gyrolite	NaCa₁₆Si₂₃AlO₆₀(OH)₈ · 14H₂O
Ca	ⓘ Anorthite var. Labradorite	(Ca,Na)[Al(Al,Si)Si₂O₈]
Ca	ⓘ Mesolite	Na₂Ca₂Si₉Al₆O₃₀ · 8H₂O
Ca	ⓘ Mordenite	(Na₂,Ca,K₂)₄(Al₈Si₄₀)O₉₆ · 28H₂O
Ca	ⓘ Thomsonite-Ca	NaCa₂[Al₅Si₅O₂₀] · 6H₂O
Ca	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Ti	Titanium
Ti	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Fe	Iron
Fe	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Fe	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂

Other Regions, Features and Areas containing this locality

Central AmericaRegion

Panama PlateTectonic Plate

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References

Tschernich, Rudy W. (1992) Zeolites of the World. Geoscience Press, Inc., Phoenix, Arizona. 567pp.

Tschernich, R.W. (1993) Zeolites of Costa Rica. Micro Probe, 7(7), 3-9.

Zeledón, L. A. (2004). Zeolitas del Valle Central de Costa Rica y sus alrededores. Revista Geológica de América Central. 31: 67-80

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