A rhyolite formation containing mineral-bearing lithophysae. The site is located approximately 5 miles south of the southern boundary of Yellowstone National Park and 20 miles north north west of Moran, Wyoming. Site was first examined in 1886.

Ref:
Iddings, J P and S L Penfield "The Minerals in Hollow Spherulites of Rhyolite from Glade Creek, Wyoming" American Journal of Science Vol 42 No 247 (1892) pp. 39-46

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

ⓘ Augite

ⓘ 'Biotite'

ⓘ Fayalite

ⓘ 'Hornblende Root Name Group' ?

8 valid minerals.

Detailed Mineral List:

ⓘ Augite

Formula: (Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆

Description: As light yellow-green inclusions in rhyolite host-rock of lithophysae, commonly partially altered

References:

Iddings, J P and S L Penfield "The Minerals in Hollow Spherulites of Rhyolite from Glade Creek, Wyoming" American Journal of Science Vol 42 No 247 (1892) pp. 39-46

ⓘ 'Biotite'

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

Description: Occurs sparingly as small, thin hexagonal crystals in lithophysae

References:

Iddings, J P and S L Penfield "The Minerals in Hollow Spherulites of Rhyolite from Glade Creek, Wyoming" American Journal of Science Vol 42 No 247 (1892) pp. 39-46

ⓘ Fayalite

Formula: Fe²⁺₂SiO₄

Description: In lithophysae as stout crystals to 1mm in length, commonly exhibiting an outer zone of alteration to iron oxides but with a glassy core. Wet chemical analysis by Iddings and Penfield showed both Fe and Mg present.

References:

Iddings, J P and S L Penfield "The Minerals in Hollow Spherulites of Rhyolite from Glade Creek, Wyoming" American Journal of Science Vol 42 No 247 (1892) pp. 39-46

ⓘ 'Hornblende Root Name Group' ?

Formula: ◻Ca₂(Z²⁺₄Z³⁺)(AlSi₇O₂₂)(OH,F,Cl)₂

Description: An amphibole-group mineral occurs sparsely in lithophysae as stout prisms to 0.5mm with brilliant faces, appearing brown in thin section. Iddings and Penfield called this material "horblende" but its conformity with modern amphibole nomenclature is uncertain.

ⓘ Magnetite

Formula: Fe²⁺Fe³⁺₂O₄

Description: As large opaque black grains in rhyolite

References:

Iddings, J P and S L Penfield "The Minerals in Hollow Spherulites of Rhyolite from Glade Creek, Wyoming" American Journal of Science Vol 42 No 247 (1892) pp. 39-46

ⓘ Opal

Formula: SiO₂ · nH₂O

Description: As translucent coatings on quartz crystals occurring in lithophysae.

References:

Iddings, J P and S L Penfield "The Minerals in Hollow Spherulites of Rhyolite from Glade Creek, Wyoming" American Journal of Science Vol 42 No 247 (1892) pp. 39-46

ⓘ Opal var. Opal-AN

Formula: SiO₂ · nH₂O

Description: As translucent coatings on quartz crystals occurring in lithophysae.

References:

Iddings, J P and S L Penfield "The Minerals in Hollow Spherulites of Rhyolite from Glade Creek, Wyoming" American Journal of Science Vol 42 No 247 (1892) pp. 39-46

ⓘ 'Plagioclase'

Formula: (Na,Ca)[(Si,Al)AlSi₂]O₈

Description: As inclusions in rhyolite host-rock of lithophysae

References:

Iddings, J P and S L Penfield "The Minerals in Hollow Spherulites of Rhyolite from Glade Creek, Wyoming" American Journal of Science Vol 42 No 247 (1892) pp. 39-46

ⓘ Quartz

Formula: SiO₂

Description: a) as sharp, stubby prismatic crystals to 5mm (average 2mm) long in lithophysae; crystals are transparent and exhibit pale smoky color. b) as slender white prisms to 10mm in length, commonly full of cracks and often covered with a crust of hyalite opal. c) as inclusions in rhyolite host-rock of lithophysae For a contemporary crystal drawing: http://www.mindat.org/photo-196234.html

References:

Iddings, J P and S L Penfield "The Minerals in Hollow Spherulites of Rhyolite from Glade Creek, Wyoming" American Journal of Science Vol 42 No 247 (1892) pp. 39-46

ⓘ Sanidine

Formula: K(AlSi₃O₈)

Description: a) as euhedral xls in lithophysae in rhyolite, forming thin crystals that are tabular parallel to the basal plane. b) as inclusions in rhyolite host-rock of lithophysae

References:

Iddings, J P and S L Penfield "The Minerals in Hollow Spherulites of Rhyolite from Glade Creek, Wyoming" American Journal of Science Vol 42 No 247 (1892) pp. 39-46

ⓘ Tridymite

Formula: SiO₂

Description: As transparent crystals lining lithophysae; some cross-shaped twins were observed.

References:

Iddings, J P and S L Penfield "The Minerals in Hollow Spherulites of Rhyolite from Glade Creek, Wyoming" American Journal of Science Vol 42 No 247 (1892) pp. 39-46

ⓘ Zircon

Formula: Zr(SiO₄)

Description: As grains commonly attached to magnetite and augite in rhyolite

References:

Iddings, J P and S L Penfield "The Minerals in Hollow Spherulites of Rhyolite from Glade Creek, Wyoming" American Journal of Science Vol 42 No 247 (1892) pp. 39-46

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘ	Magnetite	4.BB.05	Fe²⁺Fe³⁺₂O₄
ⓘ	Quartz	4.DA.05	SiO₂
ⓘ	Opal var. Opal-AN	4.DA.10	SiO₂ · nH₂O
ⓘ		4.DA.10	SiO₂ · nH₂O
ⓘ	Tridymite	4.DA.10	SiO₂
Group 9 - Silicates
ⓘ	Fayalite	9.AC.05	Fe²⁺₂SiO₄
ⓘ	Zircon	9.AD.30	Zr(SiO₄)
ⓘ	Augite	9.DA.15	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
ⓘ	Sanidine	9.FA.30	K(AlSi₃O₈)
Unclassified
ⓘ	'Biotite'	-	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
ⓘ	'Hornblende Root Name Group' ?	-	◻Ca₂(Z²⁺₄Z³⁺)(AlSi₇O₂₂)(OH,F,Cl)₂
ⓘ	'Plagioclase'	-	(Na,Ca)[(Si,Al)AlSi₂]O₈

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
H	ⓘ Opal var. Opal-AN	SiO₂ · nH₂O
H	ⓘ Opal	SiO₂ · nH₂O
H	ⓘ Hornblende Root Name Group	◻Ca₂(Z₄²⁺Z³⁺)(AlSi₇O₂₂)(OH,F,Cl)₂
O	Oxygen
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	ⓘ Fayalite	Fe₂²⁺SiO₄
O	ⓘ Opal var. Opal-AN	SiO₂ · nH₂O
O	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
O	ⓘ Opal	SiO₂ · nH₂O
O	ⓘ Quartz	SiO₂
O	ⓘ Sanidine	K(AlSi₃O₈)
O	ⓘ Tridymite	SiO₂
O	ⓘ Zircon	Zr(SiO₄)
O	ⓘ Hornblende Root Name Group	◻Ca₂(Z₄²⁺Z³⁺)(AlSi₇O₂₂)(OH,F,Cl)₂
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	ⓘ Hornblende Root Name Group	◻Ca₂(Z₄²⁺Z³⁺)(AlSi₇O₂₂)(OH,F,Cl)₂
Na	Sodium
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	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Al	ⓘ Sanidine	K(AlSi₃O₈)
Al	ⓘ Hornblende Root Name Group	◻Ca₂(Z₄²⁺Z³⁺)(AlSi₇O₂₂)(OH,F,Cl)₂
Al	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Si	Silicon
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	ⓘ Fayalite	Fe₂²⁺SiO₄
Si	ⓘ Opal var. Opal-AN	SiO₂ · nH₂O
Si	ⓘ Opal	SiO₂ · nH₂O
Si	ⓘ Quartz	SiO₂
Si	ⓘ Sanidine	K(AlSi₃O₈)
Si	ⓘ Tridymite	SiO₂
Si	ⓘ Zircon	Zr(SiO₄)
Si	ⓘ Hornblende Root Name Group	◻Ca₂(Z₄²⁺Z³⁺)(AlSi₇O₂₂)(OH,F,Cl)₂
Si	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Cl	Chlorine
Cl	ⓘ Hornblende Root Name Group	◻Ca₂(Z₄²⁺Z³⁺)(AlSi₇O₂₂)(OH,F,Cl)₂
K	Potassium
K	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
K	ⓘ Sanidine	K(AlSi₃O₈)
Ca	Calcium
Ca	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Ca	ⓘ Hornblende Root Name Group	◻Ca₂(Z₄²⁺Z³⁺)(AlSi₇O₂₂)(OH,F,Cl)₂
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
Fe	ⓘ Fayalite	Fe₂²⁺SiO₄
Fe	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
Zr	Zirconium
Zr	ⓘ Zircon	Zr(SiO₄)

Other Regions, Features and Areas containing this locality

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North America PlateTectonic Plate

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Glade Creek, Moran, Teton County, Wyoming, USAiRegional Level TypesGlade CreekCreek Moran- not defined - Teton CountyCounty WyomingState USACountry function showexplain() { $("#locexplain").toggle(); if (typeof movemap === "function") movemap(); }

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Mineral List

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

Glade Creek, Moran, Teton County, Wyoming, USA i
Regional Level Types
Glade Creek Creek
Moran - not defined -
Teton County County
Wyoming State
USA Country