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Alkali Lake, Lake Co., Oregon, USAi
Regional Level Types
Alkali LakeLake
Lake Co.County

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Lock Map
Latitude & Longitude (WGS84):
42° 58' 30'' North , 120° 1' 30'' West
Latitude & Longitude (decimal):
Locality type:

ref: Am.Min.54:1034

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

8 valid minerals.

Detailed Mineral List:

Formula: Ca(HCOO)2
Reference: Gunnar Färber - Mineralienliste 1-2018. XRD analysis Thomas Witzke.
Formula: Na2Ca(CO3)2 · 5H2O
Reference: Am.Min.54:1034
Formula: Na2Si14O29 · 11H2O
Reference: Am. Min. 54:1034
Formula: NaHCO3
Reference: Gunnar Färber
Formula: Na2CO3 · 10H2O
Reference: Am.Min.54:1034
Formula: NaHCO3 · H3BO3 · 2H2O
Reference: Gunnar Färber
Formula: Na2CO3 · H2O
Reference: Am.Min.54:1034
Formula: Na3H(CO3)2 · 2H2O
Reference: Am.Min.54:1034

List of minerals arranged by Strunz 10th Edition classification

Group 5 - Nitrates and Carbonates
Gaylussite5.CB.35Na2Ca(CO3)2 · 5H2O
Natron5.CB.10Na2CO3 · 10H2O
Thermonatrite5.CB.05Na2CO3 · H2O
Trona5.CB.15Na3H(CO3)2 · 2H2O
Group 6 - Borates
Qilianshanite6.H0.55NaHCO3 · H3BO3 · 2H2O
Group 9 - Silicates
Magadiite9.EA.20Na2Si14O29 · 11H2O
Group 10 - Organic Compounds

List of minerals arranged by Dana 8th Edition classification

Trona13.1.4.1Na3H(CO3)2 · 2H2O
Natron15.1.2.1Na2CO3 · 10H2O
Thermonatrite15.1.1.1Na2CO3 · H2O
AmBn(XO3)p·xH2O, with (m+n):p > 1:1
Gaylussite15.2.2.1Na2Ca(CO3)2 · 5H2O
Qilianshanite17.1.13.1NaHCO3 · H3BO3 · 2H2O
Group 78 - Unclassified Silicates
Magadiite78.7.12.1Na2Si14O29 · 11H2O
Unclassified Minerals, Mixtures, etc.

List of minerals for each chemical element

H GaylussiteNa2Ca(CO3)2 · 5H2O
H NatronNa2CO3 · 10H2O
H ThermonatriteNa2CO3 · H2O
H MagadiiteNa2Si14O29 · 11H2O
H TronaNa3H(CO3)2 · 2H2O
H FormicaiteCa(HCOO)2
H QilianshaniteNaHCO3 · H3BO3 · 2H2O
H NahcoliteNaHCO3
B QilianshaniteNaHCO3 · H3BO3 · 2H2O
C GaylussiteNa2Ca(CO3)2 · 5H2O
C NatronNa2CO3 · 10H2O
C ThermonatriteNa2CO3 · H2O
C TronaNa3H(CO3)2 · 2H2O
C FormicaiteCa(HCOO)2
C QilianshaniteNaHCO3 · H3BO3 · 2H2O
C NahcoliteNaHCO3
O GaylussiteNa2Ca(CO3)2 · 5H2O
O NatronNa2CO3 · 10H2O
O ThermonatriteNa2CO3 · H2O
O MagadiiteNa2Si14O29 · 11H2O
O TronaNa3H(CO3)2 · 2H2O
O FormicaiteCa(HCOO)2
O QilianshaniteNaHCO3 · H3BO3 · 2H2O
O NahcoliteNaHCO3
Na GaylussiteNa2Ca(CO3)2 · 5H2O
Na NatronNa2CO3 · 10H2O
Na ThermonatriteNa2CO3 · H2O
Na MagadiiteNa2Si14O29 · 11H2O
Na TronaNa3H(CO3)2 · 2H2O
Na QilianshaniteNaHCO3 · H3BO3 · 2H2O
Na NahcoliteNaHCO3
Si MagadiiteNa2Si14O29 · 11H2O
Ca GaylussiteNa2Ca(CO3)2 · 5H2O
Ca FormicaiteCa(HCOO)2

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

0 - 2.588 Ma

ID: 1454639
Quaternary surficial deposits; Playa lake deposits

Age: Pleistocene (0 - 2.588 Ma)

Description: Playa deposits; unconsolidated rocks; fine grained sediments; lacustrine; clay to sand grains

Lithology: Major:: {mixed playa sediment} Minor:: {evaporite}

Reference: R.L. Smith, W.P. Roe (compilers). Oregon Geologic Data Compilation, release 6. State of Oregon Department of Geology and Mineral Industries. [20]

0 - 0.0117 Ma

ID: 2823058
Playa deposits

Age: Anthropocene (0 - 0.0117 Ma)

Description: Clay, silt, sand, and some evaporites

Comments: Original map source: Miller, R.J., Raines, G.L., and Connors, K.A., 2002, Spatial digital database for the geologic map of Oregon: Geology compiled by G.W. Walker and N.S. MacLeod, USGS Open-File Report 03-67, scale 1:500,000.

Lithology: Major:{clay,silt,sand}, Minor:{evaporite}

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]

2.588 - 23.03 Ma

ID: 3186305
Cenozoic volcanic rocks

Age: Neogene (2.588 - 23.03 Ma)

Stratigraphic Name: Columbia River Basalt

Comments: Columbia Plateau

Lithology: Flood basalt(s); mafic volcanic rocks; basalt

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, used under Creative Commons Attribution 4.0 License

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