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Petersen Mountain ("Peterson Mountain"; Hallelujah Junction [sic]), Hallelujah Junction area, Washoe Co., Nevada, USA

This page kindly sponsored by Russ Rizzo
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Latitude & Longitude (WGS84): 39° 47' 44'' North , 119° 58' 35'' West
Latitude & Longitude (decimal): 39.79583,-119.97639
GeoHash:G#: 9r4dmuege
Locality type:Mountain
Köppen climate type:Csb : Warm-summer Mediterranean climate

A series of quartz occurrences located about 30 miles N of Reno.
A long, N-S trending summit straddling the California-Nevada state line. The USGS GNIS database categorizes this linear summit as a range. The majority of the mountain lies in Nevada, with the western foot in Lassen County, California. The quartz occurrence(s) lie on both sides of the state line. Collectors have come to refer to these quartz occurrences simply as "Hallelujah Junction," despite the fact that the junction is located 6-7 miles W/SW of the mountain in California.

"Peterson [sic] mountain is located off of highway route 395, outside of Reno." (...) "The intersection of 395 and 70 is called Hallelujah Junction. 5-7 miles past the junction on 395 is where you want to hit the dirt. You will see it the path, there is a janky barbed wire fence."

NOTE: "Peterson Mountain" is a misnomer.

Alternative Label Names

This is a list of additional names that have been recorded for mineral labels associated with this locality in the minID database. This may include previous versions of the locality name hierarchy from mindat.org, data entry errors, and it may also include unconfirmed sublocality names or other names that can only be matched to this level.

Petersen Mountain, Hallelujah Junction area, Washoe Co., Nevada, USA

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

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

6 valid minerals.

Detailed Mineral List:

'Chlorite Group'
Epidote ?
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: Found myself at the locality in 1999
Formula: Ca(UO2)2(PO4)2 · 6-8H2O
Formula: KAl2(AlSi3O10)(OH)2
Formula: {Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Formula: FeS2
Formula: SiO2
Reference: Rob Lavinsky
Quartz var: Amethyst
Formula: SiO2
Reference: Rob Lavinsky
Quartz var: Ametrine
Formula: SiO2
Quartz var: Citrine
Formula: SiO2
Quartz var: Sceptre Quartz
Formula: SiO2
Quartz var: Smoky Quartz
Formula: SiO2
Reference: Rob Lavinsky

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Group 4 - Oxides and Hydroxides
var: Amethyst4.DA.05SiO2
var: Ametrine4.DA.05SiO2
var: Citrine4.DA.05SiO2
var: Sceptre Quartz4.DA.05SiO2
var: Smoky Quartz4.DA.05SiO2
Group 8 - Phosphates, Arsenates and Vanadates
Meta-autunite8.EB.10Ca(UO2)2(PO4)2 · 6-8H2O
Group 9 - Silicates
Epidote ?9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Unclassified Minerals, Rocks, etc.
Chlorite Group-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:2
AB2(XO4)2·xH2O, containing (UO2)2+
Meta-autunite40.2a.1.2Ca(UO2)2(PO4)2 · 6-8H2O
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Epidote ?58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Unclassified Minerals, Rocks, etc.
'Chlorite Group'-
var: Amethyst
var: Ametrine-SiO2
var: Citrine-SiO2
var: Sceptre Quartz-SiO2
var: Smoky Quartz-SiO2

List of minerals for each chemical element

H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
H MuscoviteKAl2(AlSi3O10)(OH)2
H Piemontite{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
O Quartz (var: Amethyst)SiO2
O Quartz (var: Ametrine)SiO2
O Quartz (var: Citrine)SiO2
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
O MuscoviteKAl2(AlSi3O10)(OH)2
O Piemontite{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
O QuartzSiO2
O Quartz (var: Sceptre Quartz)SiO2
O Quartz (var: Smoky Quartz)SiO2
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al Piemontite{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Si Quartz (var: Amethyst)SiO2
Si Quartz (var: Ametrine)SiO2
Si Quartz (var: Citrine)SiO2
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si Piemontite{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Si QuartzSiO2
Si Quartz (var: Sceptre Quartz)SiO2
Si Quartz (var: Smoky Quartz)SiO2
P Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
S PyriteFeS2
K MuscoviteKAl2(AlSi3O10)(OH)2
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
Ca Piemontite{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Mn Piemontite{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe PyriteFeS2
U Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O

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

Miocene - Jurassic
5.333 - 201.3 Ma

ID: 2977204
Felsic phaneritic intrusive rocks

Age: Phanerozoic (5.333 - 201.3 Ma)

Description: Poorly dated felsic intrusions described as granitic rocks, granite porphyry, granodiorite, quartz monzonite, and many undivided plutonic rocks are included here. They crop out in every county except Elko and northern Washoe.

Lithology: Major:{granitic,granodiorite,quartz monzonite}, Minor:{plutonic}

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]

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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