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Cascade Canyon, San Bernardino County, California, USA i
Regional Level Types
Cascade Canyon Canyon
San Bernardino County County
California State
USA Country

Regional Level Types
Cascade Canyon	Canyon
San Bernardino County	County
California	State
USA	Country

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Corundum bearing matrix in Cascade Canyon

Cascade Canyon, San Bernardino County, California, USA

Lower Cascade Canyon

Cascade Canyon, San Bernardino County, California, USA

Pyrite

Cascade Canyon, San Bernardino County, California, USA

Corundum bearing matrix in Cascade Canyon

Cascade Canyon, San Bernardino County, California, USA

Lower Cascade Canyon

Cascade Canyon, San Bernardino County, California, USA

Pyrite

Cascade Canyon, San Bernardino County, California, USA

Corundum bearing matrix in Cascade Canyon

Cascade Canyon, San Bernardino County, California, USA

Lower Cascade Canyon

Cascade Canyon, San Bernardino County, California, USA

Latitude & Longitude (WGS84):

34° 12' 46'' North , 117° 39' 47'' West

Latitude & Longitude (decimal):

G#: 9qh6ds0ru

Type:

Köppen climate type:

Csb : Warm-summer Mediterranean climate

Nearest Settlements:

Place	Population	Distance
San Antonio Heights	3,371 (2011)	6.4km
Upland	76,443 (2017)	12.9km
Rancho Cucamonga	175,236 (2017)	13.5km
Claremont	36,283 (2017)	13.9km
Montclair	38,690 (2017)	15.2km

Nearest Clubs:
Local clubs are the best way to get access to collecting localities

Club	Location	Distance
Monrovia Rock Hounds Inc.	Monrovia, California	32km
West End Prospectors Corporation	Norco, California	33km
Orange Belt Mineralogical Society	San Bernardino, California	36km
Valley Prospectors, Inc.	San Bernardino, California	36km
Route 66 Gold Miners Inc	Brea, California	39km

Mindat Locality ID:

28245

Long-form identifier:

mindat:1:2:28245:8

GUID (UUID V4):

b3340696-21d9-4664-b1cf-ec876412894d

An E-W-trending branch of San Antonio Canyon located in the NE¼SE¼ sec. 36, T2N, R8W, SBM.

Approximate elevation of mineralized area is between 4500 and 5000 feet. Geologically, the area consists of metamorphic rock intruded by some granitic masses. Principal stratified layers have an east-west strike and a north dip of about 60 degrees. Beds from north to south consist of quartzite, limestone followed by quartzite, limestone and gneiss. This series is correlated with some Paleozoic limestone in the San Bernardino mountains. Mineralization of the area is probably in part due to the intrusion of the igneous mass.

At least 20 minerals can be collected in the Cascade canyon area, among them lazurite, diopside, corundum, "hydrotroilite" and phlogopite. Lapis lazuli occurs in the limestone in small bands from 1/8 inch to six inches wide, sometimes containing pyrite crystals. Corundum has not been found in the canyon proper, but good specimens have been obtained in San Antonio wash. Crystals are from 1/4 inch to one inch in length and are of a pinkish color.

A large variety of metamorphic rocks occur here

Warning: very steep topography subject to landslides. NOTE: This canyon crosses the county lines into Los Angeles County.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

14 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

ⓘ 'Lapis lazuli'

Detailed Mineral List:

ⓘ Calcite

Formula: CaCO₃

References:

Alfredo Petrov, field observations.

ⓘ Corundum

Formula: Al₂O₃

Colour: Pale rose to deep lilac

Description: Occurs in metamorphosed limestone.

References:

Merriam, R. and Laudermilk, J. D. 1936. Two Diopsides from Southern California. The American Mineralogist: 21(11): 715-718

Louderback, George Davis & Walter C. Blasdale (1910), Ruby corundum from San Bernardino County, California (abstract): Science, new series: 32: 31

[…Geological Society of America Bulletin (1910): 21: 793]

Eaton, A.L. (1946), Pomona club collects at mineralized Cascade Canyon. The Desert Magazine, Volume 9 Number 10, August. Desert Press, Inc. El Centro, California, p. 31, 40pp.

Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 161

Shepherd, H. V. (2010, March). Zr-in-rutile Thermometry of a Ruby-bearing Metamorphic Rock, Cascade Canyon, San Bernardino County, CA. In Geological Society of America Abstracts with Programs, (Vol. 42, No. 1, p. 160).

ⓘ Corundum var. Ruby

Formula: Al₂O₃

Habit: hexagonal crystals

Colour: pink, red

Description: crystals in matrix up to 26 mm long

References:

ⓘ Corundum var. Sapphire

Formula: Al₂O₃

References:

Eaton, A. L. 1946. Pomona club collects at mineralized Cascade Canyon. The Desert Magazine, Volume 9 Number 10, August. Desert Press, Inc. El Centro, California, p. 31, 40pp.

ⓘ Epidote

Formula: (CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)

References:

Alfredo Petrov, field observations.

ⓘ Forsterite

Formula: Mg₂SiO₄

References:

Alfredo Petrov, field observations.

ⓘ 'Garnet Group'

Formula: X₃Z₂(SiO₄)₃

References:

Alfredo Petrov, field observations.

ⓘ Glaucophane ?

Formula: ◻[Na₂][Mg₃Al₂]Si₈O₂₂(OH)₂

References:

Merriam, R. and Laudermilk, J. D. 1936. Two Diopsides from Southern California. The American Mineralogist. 21(11):715-718.

ⓘ Graphite

Formula: C

References:

Alfredo Petrov, field observations.

ⓘ Haüyne

Formula: Na₃Ca(Si₃Al₃)O₁₂(SO₄)

References:

Anthony, John W., Bideaux, Richard A., Bladh, Kenneth W., Nichols, Monte C. - Eds. (2016) Handbook of Mineralogy. https://www.handbookofmineralogy.org/

ⓘ 'Hydrotroilite'

Formula: FeS · H₂O ?

References:

Merriam, R. and Laudermilk, J. D. 1936. Two Diopsides from Southern California. The American Mineralogist. 21(11):715-718.

ⓘ 'K Feldspar'

References:

ⓘ Lazurite

Formula: Na₇Ca(Al₆Si₆O₂₄)(SO₄)(S₃) · H₂O

References:

Anthony, John W., Bideaux, Richard A., Bladh, Kenneth W., Nichols, Monte C. - Eds. (2016) Handbook of Mineralogy. https://www.handbookofmineralogy.org/

ⓘ 'Monazite'

Formula: REE(PO₄)

References:

ⓘ Muscovite

Formula: KAl₂(AlSi₃O₁₀)(OH)₂

References:

ⓘ Muscovite var. Fuchsite

Formula: K(Al,Cr)₃Si₃O₁₀(OH)₂

Description: Occurs in schists.

References:

Merriam, R. and Laudermilk, J. D. 1936. Two Diopsides from Southern California. The American Mineralogist: 21(11): 715-718

Van Nostrand Reinholt Press: 426.

Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc.

ⓘ Phlogopite

Formula: KMg₃(AlSi₃O₁₀)(OH)₂

References:

Eaton, A. L. 1946. Pomona club collects at mineralized Cascade Canyon. The Desert Magazine, Volume 9 Number 10, August. Desert Press, Inc. El Centro, California, p. 31, 40pp.

ⓘ Pyrite

Formula: FeS₂

Description: small inclusions in corundum

References:

Alfredo Petrov, field observations.

ⓘ Rutile

Formula: TiO₂

Habit: Inclusions in corundum

Colour: dark orange-brown

References:

Shepherd, H.V., Johnson, E.A. and Logan , M.A.V. (2010) Zr-in-rutile thermometry of a ruby-bearing metamorphic rock, Cascade Canyon, San Bernardino County, CA . Geological Society of America Northeastern Section (45th annual) and Southeastern Section (59th annual) Joint Meeting, 65-24.

ⓘ Sillimanite

Formula: Al₂(SiO₄)O

References:

ⓘ Titanite

Formula: CaTi(SiO₄)O

References:

Alfredo Petrov, field observations.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘ	Graphite	1.CB.05a	C
Group 2 - Sulphides and Sulfosalts
ⓘ	Pyrite	2.EB.05a	FeS₂
Group 4 - Oxides and Hydroxides
ⓘ	Corundum var. Sapphire	4.CB.05	Al₂O₃
ⓘ		4.CB.05	Al₂O₃
ⓘ	var. Ruby	4.CB.05	Al₂O₃
ⓘ	Rutile	4.DB.05	TiO₂
Group 5 - Nitrates and Carbonates
ⓘ	Calcite	5.AB.05	CaCO₃
Group 9 - Silicates
ⓘ	Forsterite	9.AC.05	Mg₂SiO₄
ⓘ	Sillimanite	9.AF.05	Al₂(SiO₄)O
ⓘ	Titanite	9.AG.15	CaTi(SiO₄)O
ⓘ	Epidote	9.BG.05a	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
ⓘ	Glaucophane ?	9.DE.25	◻[Na₂][Mg₃Al₂]Si₈O₂₂(OH)₂
ⓘ	Muscovite	9.EC.15	KAl₂(AlSi₃O₁₀)(OH)₂
ⓘ	var. Fuchsite	9.EC.15	K(Al,Cr)₃Si₃O₁₀(OH)₂
ⓘ	Phlogopite	9.EC.20	KMg₃(AlSi₃O₁₀)(OH)₂
ⓘ	Lazurite	9.FB.10	Na₇Ca(Al₆Si₆O₂₄)(SO₄)(S₃) · H₂O
ⓘ	Haüyne	9.FB.10	Na₃Ca(Si₃Al₃)O₁₂(SO₄)
Unclassified
ⓘ	'Monazite'	-	REE(PO₄)
ⓘ	'Hydrotroilite'	-	FeS · H₂O ?
ⓘ	'K Feldspar'	-
ⓘ	'Garnet Group'	-	X₃Z₂(SiO₄)₃

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
H	ⓘ Muscovite var. Fuchsite	K(Al,Cr)₃Si₃O₁₀(OH)₂
H	ⓘ Glaucophane	◻[Na₂][Mg₃Al₂]Si₈O₂₂(OH)₂
H	ⓘ Lazurite	Na₇Ca(Al₆Si₆O₂₄)(SO₄)(S₃) · H₂O
H	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
H	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
H	ⓘ Hydrotroilite	FeS · H₂O ?
C	Carbon
C	ⓘ Calcite	CaCO₃
C	ⓘ Graphite	C
O	Oxygen
O	ⓘ Calcite	CaCO₃
O	ⓘ Corundum	Al₂O₃
O	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
O	ⓘ Forsterite	Mg₂SiO₄
O	ⓘ Muscovite var. Fuchsite	K(Al,Cr)₃Si₃O₁₀(OH)₂
O	ⓘ Glaucophane	◻[Na₂][Mg₃Al₂]Si₈O₂₂(OH)₂
O	ⓘ Haüyne	Na₃Ca(Si₃Al₃)O₁₂(SO₄)
O	ⓘ Lazurite	Na₇Ca(Al₆Si₆O₂₄)(SO₄)(S₃) · H₂O
O	ⓘ Monazite	REE(PO₄)
O	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
O	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
O	ⓘ Corundum var. Ruby	Al₂O₃
O	ⓘ Rutile	TiO₂
O	ⓘ Corundum var. Sapphire	Al₂O₃
O	ⓘ Sillimanite	Al₂(SiO₄)O
O	ⓘ Titanite	CaTi(SiO₄)O
O	ⓘ Hydrotroilite	FeS · H₂O ?
O	ⓘ Garnet Group	X₃Z₂(SiO₄)₃
Na	Sodium
Na	ⓘ Glaucophane	◻[Na₂][Mg₃Al₂]Si₈O₂₂(OH)₂
Na	ⓘ Haüyne	Na₃Ca(Si₃Al₃)O₁₂(SO₄)
Na	ⓘ Lazurite	Na₇Ca(Al₆Si₆O₂₄)(SO₄)(S₃) · H₂O
Mg	Magnesium
Mg	ⓘ Forsterite	Mg₂SiO₄
Mg	ⓘ Glaucophane	◻[Na₂][Mg₃Al₂]Si₈O₂₂(OH)₂
Mg	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
Al	Aluminium
Al	ⓘ Corundum	Al₂O₃
Al	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Al	ⓘ Muscovite var. Fuchsite	K(Al,Cr)₃Si₃O₁₀(OH)₂
Al	ⓘ Glaucophane	◻[Na₂][Mg₃Al₂]Si₈O₂₂(OH)₂
Al	ⓘ Haüyne	Na₃Ca(Si₃Al₃)O₁₂(SO₄)
Al	ⓘ Lazurite	Na₇Ca(Al₆Si₆O₂₄)(SO₄)(S₃) · H₂O
Al	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Al	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
Al	ⓘ Corundum var. Ruby	Al₂O₃
Al	ⓘ Corundum var. Sapphire	Al₂O₃
Al	ⓘ Sillimanite	Al₂(SiO₄)O
Si	Silicon
Si	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Si	ⓘ Forsterite	Mg₂SiO₄
Si	ⓘ Muscovite var. Fuchsite	K(Al,Cr)₃Si₃O₁₀(OH)₂
Si	ⓘ Glaucophane	◻[Na₂][Mg₃Al₂]Si₈O₂₂(OH)₂
Si	ⓘ Haüyne	Na₃Ca(Si₃Al₃)O₁₂(SO₄)
Si	ⓘ Lazurite	Na₇Ca(Al₆Si₆O₂₄)(SO₄)(S₃) · H₂O
Si	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Si	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
Si	ⓘ Sillimanite	Al₂(SiO₄)O
Si	ⓘ Titanite	CaTi(SiO₄)O
Si	ⓘ Garnet Group	X₃Z₂(SiO₄)₃
P	Phosphorus
P	ⓘ Monazite	REE(PO₄)
S	Sulfur
S	ⓘ Haüyne	Na₃Ca(Si₃Al₃)O₁₂(SO₄)
S	ⓘ Lazurite	Na₇Ca(Al₆Si₆O₂₄)(SO₄)(S₃) · H₂O
S	ⓘ Pyrite	FeS₂
S	ⓘ Hydrotroilite	FeS · H₂O ?
K	Potassium
K	ⓘ Muscovite var. Fuchsite	K(Al,Cr)₃Si₃O₁₀(OH)₂
K	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
K	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
Ca	Calcium
Ca	ⓘ Calcite	CaCO₃
Ca	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Ca	ⓘ Haüyne	Na₃Ca(Si₃Al₃)O₁₂(SO₄)
Ca	ⓘ Lazurite	Na₇Ca(Al₆Si₆O₂₄)(SO₄)(S₃) · H₂O
Ca	ⓘ Titanite	CaTi(SiO₄)O
Ti	Titanium
Ti	ⓘ Rutile	TiO₂
Ti	ⓘ Titanite	CaTi(SiO₄)O
Cr	Chromium
Cr	ⓘ Muscovite var. Fuchsite	K(Al,Cr)₃Si₃O₁₀(OH)₂
Fe	Iron
Fe	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Fe	ⓘ Pyrite	FeS₂
Fe	ⓘ Hydrotroilite	FeS · H₂O ?

Other Regions, Features and Areas containing this locality

North America

Coast MountainsMountain Range

North America Plate

Mojave DomainDomain

Pacific PlateTectonic Plate

USA

California
- San Gabriel MountainsMountain Range

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

Louderback, George Davis & Walter C. Blasdale (1910), Ruby corundum from San Bernardino County, California (abstract): Science, new series: 32: 31; […Geological Society of America Bulletin: 21: 793 (1910)].

Merriam, R. and Laudermilk, J. D. (1936) Two Diopsides from Southern California. The American Mineralogist: 21(11): 715-718.

Eaton, A.L. (1946), Pomona club collects at mineralized Cascade Canyon. The Desert Magazine, Volume 9 Number 10, August. Desert Press, Inc. El Centro, California, 40pp.: 9(10): 31.

Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 161.

Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc.

Shepherd, H. V. (2010). Zr-in-rutile Thermometry of a Ruby-bearing Metamorphic Rock, Cascade Canyon, San Bernardino County, California. In Geological Society of America Abstracts with Programs: 42(1)(March): 160.

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Cascade Canyon, San Bernardino County, California, USAiRegional Level TypesCascade CanyonCanyon San Bernardino CountyCounty CaliforniaState USACountry function showexplain() { $("#locexplain").toggle(); if (typeof movemap === "function") movemap(); }

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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

Cascade Canyon, San Bernardino County, California, USA i
Regional Level Types
Cascade Canyon Canyon
San Bernardino County County
California State
USA Country