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Cascade Canyon, San Gabriel Mts, San Bernardino Co., California, USA

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Detailed Mineral List:


Calcite
Formula: CaCO3
Reference: Alfredo Petrov, field observations.
Corundum
Formula: Al2O3
Colour: Pale rose to deep lilac
Description: Occurs in metamorphosed limestone.
Reference: 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]; Merriam, R. and Laudermilk, J. D. 1936. Two Diopsides from Southern California. The American Mineralogist: 21(11): 715-718; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 161; 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.; 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
Reference: Widely distributed in numerous collections.
Corundum var: Sapphire
Formula: Al2O3
Reference: 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: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: Alfredo Petrov, field observations.
Forsterite
Formula: Mg2SiO4
Reference: Alfredo Petrov, field observations.
'Garnet'
Formula: X3Z2(SiO4)3
Reference: Alfredo Petrov, field observations.
Glaucophane ?
Formula: ◻[Na2][Mg3Al2]Si8O22(OH)2
Reference: Merriam, R. and Laudermilk, J. D. 1936. Two Diopsides from Southern California. The American Mineralogist. 21(11):715-718.
Graphite
Formula: C
Reference: Alfredo Petrov, field observations.
Haüyne
Formula: (Na,K)3(Ca,Na)(Al3Si3O12)(SO4,S,Cl)
Reference: Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols
'Hydrotroilite'
Formula: FeS · H2O ?
Reference: Merriam, R. and Laudermilk, J. D. 1936. Two Diopsides from Southern California. The American Mineralogist. 21(11):715-718.
'K Feldspar'
Reference: 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).
'Lapis lazuli'
Reference: 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.
'Lazurite'
Formula: Na6Ca2(Al6Si6O24)(SO4,S,S2, S3,Cl,OH)2
Reference: Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols
'Monazite'
Reference: 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).
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: 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).
Muscovite var: Fuchsite
Formula: K(Al,Cr)3Si3O10(OH)2
Description: Occurs in schists.
Reference: Merriam, R. and Laudermilk, J. D. 1936. Two Diopsides from Southern California. The American Mineralogist: 21(11): 715-718; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 426.
Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
Reference: 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
Reference: Alfredo Petrov, field observations.; 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).
Rutile
Formula: TiO2
Habit: Inclusions in corundum
Colour: dark orange-brown
Reference: 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.; 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).
Sillimanite
Formula: Al2(SiO4)O
Reference: 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).
Titanite
Formula: CaTi(SiO4)O
Reference: Alfredo Petrov, field observations.

References

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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 Reinholt Press: 143, 426.
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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