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Griffith Park, Hollywood, Hollywood Hills, Los Angeles, Santa Monica Mts, Los Angeles Co., California, USAi
Regional Level Types
Griffith ParkPark
Hollywood- not defined -
Hollywood HillsGroup of Hills
Los Angeles- not defined -
Santa Monica MtsMountain Range
Los Angeles Co.County

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Lock Map
Latitude & Longitude (WGS84):
34° 8' 8'' North , 118° 18' 2'' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
Glendale201,020 (2017)4.2km
Hollywood167,664 (2016)4.8km
Universal City105,000 (2018)4.9km
Burbank105,319 (2017)5.1km
Silver Lake32,890 (2015)6.1km

Amygdaloidal cavities in basalt.

Regions containing this locality

Pacific OceanOcean
Pacific PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

Mineral list contains entries from the region specified including sub-localities

8 valid minerals. 1 erroneous literature entry.

Detailed Mineral List:

'Amphibole Supergroup'
Formula: AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Reference: Personal communication of Neuerburg to Murdoch & Webb; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 69.
Formula: Na(AlSi2O6) · H2O
Reference: Tschernich, 1992. Zeolites of the World
Description: Discredited, see amphibole
Reference: Personal communication of Neuerburg to Murdoch & Webb; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 69.
Formula: CaCO3
Reference: Tschernich, 1992. Zeolites of the World
Formula: CaAl2Si4O12 · 4H2O
Reference: Tschernich, 1992. Zeolites of the World
Formula: Na2Al2Si3O10 · 2H2O
Reference: Tschernich, 1992. Zeolites of the World
Formula: Ca2Al2Si3O10(OH)2
Reference: Tschernich, 1992. Zeolites of the World
Formula: SiO2
Description: Good and abundant bipyramidal crystals.
Reference: Sharp, W.E. (1959) Minerals from Los Angeles County, California. Printed privately, Los Angeles, California: 15; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 346.
Formula: Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Saponite var: Ferroan Saponite
Formula: Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Formula: NaCa2[Al5Si5O20] · 6H2O
Reference: Tschernich, 1992. Zeolites of the World

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Group 5 - Nitrates and Carbonates
Group 9 - Silicates
Analcime9.GB.05Na(AlSi2O6) · H2O
Laumontite9.GB.10CaAl2Si4O12 · 4H2O
Natrolite9.GA.05Na2Al2Si3O10 · 2H2O
Saponite9.EC.45Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
var: Ferroan Saponite9.EC.45Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Thomsonite-Ca9.GA.10NaCa2[Al5Si5O20] · 6H2O
Unclassified Minerals, Rocks, etc.
'Amphibole Supergroup'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Barkevikite' ?-

List of minerals arranged by Dana 8th Edition classification

Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 clays
Saponite71.3.1b.2Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Group 72 - PHYLLOSILICATES Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with 4-membered rings
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Group 77 - TECTOSILICATES Zeolites
Zeolite group - True zeolites
Analcime77.1.1.1Na(AlSi2O6) · H2O
Laumontite77.1.1.4CaAl2Si4O12 · 4H2O
Natrolite77.1.5.1Na2Al2Si3O10 · 2H2O
Unclassified Minerals, Mixtures, etc.
'Amphibole Supergroup'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Barkevikite' ?-
var: Ferroan Saponite
-Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Thomsonite-Ca-NaCa2[Al5Si5O20] · 6H2O

List of minerals for each chemical element

H Saponite (var: Ferroan Saponite)Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
H Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
H NatroliteNa2Al2Si3O10 · 2H2O
H AnalcimeNa(AlSi2O6) · H2O
H LaumontiteCaAl2Si4O12 · 4H2O
H PrehniteCa2Al2Si3O10(OH)2
H SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
H Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
C CalciteCaCO3
O Saponite (var: Ferroan Saponite)Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
O Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
O NatroliteNa2Al2Si3O10 · 2H2O
O AnalcimeNa(AlSi2O6) · H2O
O LaumontiteCaAl2Si4O12 · 4H2O
O CalciteCaCO3
O PrehniteCa2Al2Si3O10(OH)2
O QuartzSiO2
O SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
O Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
F Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Na Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
Na NatroliteNa2Al2Si3O10 · 2H2O
Na AnalcimeNa(AlSi2O6) · H2O
Na SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Mg Saponite (var: Ferroan Saponite)Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Mg SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Al Saponite (var: Ferroan Saponite)Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Al Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
Al NatroliteNa2Al2Si3O10 · 2H2O
Al AnalcimeNa(AlSi2O6) · H2O
Al LaumontiteCaAl2Si4O12 · 4H2O
Al PrehniteCa2Al2Si3O10(OH)2
Al SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Al Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Si Saponite (var: Ferroan Saponite)Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Si Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
Si NatroliteNa2Al2Si3O10 · 2H2O
Si AnalcimeNa(AlSi2O6) · H2O
Si LaumontiteCaAl2Si4O12 · 4H2O
Si PrehniteCa2Al2Si3O10(OH)2
Si QuartzSiO2
Si SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Si Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Cl Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Ca Saponite (var: Ferroan Saponite)Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Ca Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
Ca LaumontiteCaAl2Si4O12 · 4H2O
Ca CalciteCaCO3
Ca PrehniteCa2Al2Si3O10(OH)2
Ca SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Ti Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Fe Saponite (var: Ferroan Saponite)Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Fe SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Pliocene - Oligocene
2.588 - 33.9 Ma

ID: 2935620
Miocene marine rocks

Age: Cenozoic (2.588 - 33.9 Ma)

Stratigraphic Name: Agua Sandstone Member; Alferitz Formation; Altamira Shale Member; Antelope Shale Member; Big Blue Serpentinous Member; Branch Canyon Formation; Briones Formation; Button Bed Sandstone Member; Capistrano Formation; Carneros Sandstone Member; Castaic Formation; Cierbo Sandstone; Claremont Shale; Devilwater Silt-Gould Shale Member; Escudo Sandstone; Fish Creek Gypsum Member; Freeman Silt; Gallaway Beds; Hambre Sandstone; Hannah Formation; Hercules Shale Member; Jewett Sand; La Vida Member; Malaga Mudstone Member; McDonald Shale; McLure Shale Member; Media Shale Member; Modelo Formation; Monterey Formation; Neroly Formation; Olcese Sand; Oso Member; Oursan Sandstone; Painted Rock Sandstone Member; Pismo Formation; Pleito Formation; Point Arena Beds; Point Sal Formation; Puente Formation; Pullen Formation; Quail Lake Formation; Reef Ridge Shale; Rincon Shale; Rodeo Shale; Round Mountain Silt; Salinas Shale; Salt Creek Shale Member; Saltos Shale Member; Sandholdt Shale; San Onofre Breccia; San Pablo Group; Santa Margarita Formation; Santos Shale Member; Sisquoc Formation; Sobrante Sandstone; Soda Lake Sandstone Member; Soda Lake Shale Member; Soquel Member Split Mountain Formation; Sycamore Canyon Member; Temblor Formation; Tequepis Sandstone; Tice Shale; Topanga Formation; Twisselman Sandstone Member; Valmonte Diatomite Member; Vaqueros Formation; Vedder Sand; Whiterock Bluff Shale Member; Wimer Formation; Yorba Member

Description: Sandstone, shale, siltstone, conglomerate and breccia; in part Pliocene and Oligocene.

Comments: Original map source: Saucedo, G.J., Bedford, D.R., Raines, G.L., Miller, R.J., and Wentworth, C.M., 2000, GIS Data for the Geologic Map of California, California Department of Conservation, Division of Mines and Geology, CD-ROM 2000-07, scale 1:750,000.

Lithology: Major:{sandstone,mudstone}, Minor:{siltstone,conglomerate}, Incidental:{gypsum}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Middle Miocene
11.62 - 15.97 Ma

ID: 2664413
Topanga Group, interlayered basalt

Age: Miocene (11.62 - 15.97 Ma)

Stratigraphic Name: Topanga Group

Description: Intrusive and extrusive volcanic rocks, chiefly basaltic and andesitic, interlayered with sandstone and shale assigned to Topanga Group; in part, may be correlative with Conejo Volcanics of central and western Santa Monica Mountains and adjacent areas to northwest; but includes rocks dated as older than oldest contiguous Conejo (McCulloh and others, 2002). (eastern Santa Monica Mountains, Hoots, 1931; Santa Susana Mountains, Evans and Miller, 1978; northeastern Verdugo Mountains, Oakeshott, 1958)

Reference: Alvarez, R.M. and K.R. Bovard. Preliminary Geologic Map of the Los Angeles 30' x 60' Quadrangle, Southern California. U.S. Geological Survey Open-File Report 2005-1019. [112]

66 - 145 Ma

ID: 3192002
Mesozoic intrusive rocks

Age: Cretaceous (66 - 145 Ma)

Lithology: Intrusive igneous rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License


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Neuerberg, George J., (1951), Minerals of the Eastern Santa Monica Mountains, Los Angeles City; American Mineralogist: 36: 156-160.
Geology of the Griffith Park Area

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