IMPORTANT MESSAGE. We need your support now to keep running. Click here to find out why.
Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for Educators
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsThe ElementsUsersBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Alkali Lake, Lake Co., Oregon, USA

This page is currently not sponsored. Click here to sponsor this page.
Lock Map
Latitude & Longitude (WGS84): 42° 58' 30'' North , 120° 1' 30'' West
Latitude & Longitude (decimal): 42.97500,-120.02500
GeoHash:G#: 9rdskz27w
Locality type:Lake
Köppen climate type:Csb : Warm-summer Mediterranean climate

ref: Am.Min.54:1034

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

8 valid minerals.

Detailed Mineral List:

Formicaite ?
Formula: Ca(HCOO)2
Reference: Gunnar Färber - Mineralienliste 1-2018
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
'Gaylussite'5.CB.35Na2Ca(CO3)2 · 5H2O
'Natron'5.CB.10Na2CO3 · 10H2O
'Thermonatrite'5.CB.05Na2CO3 · H2O
'Trona'5.CB.15Na3H(CO3)2 · 2H2O
Group 6 - Borates
'Qilianshanite'6.H0.55NaHCO3 · H3BO3 · 2H2O
Group 9 - Silicates
'Magadiite'9.EA.20Na2Si14O29 · 11H2O
Group 10 - Organic Compounds
'Formicaite' ?10.AA.05Ca(HCOO)2

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, Rocks, etc.
Formicaite ?-Ca(HCOO)2

List of minerals for each chemical element

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

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

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

This page contains all mineral locality references listed on 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 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.
Mineral and/or Locality is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © and the Hudson Institute of Mineralogy 1993-2018, except where stated. relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: November 15, 2018 14:56:30 Page generated: August 29, 2018 23:12:17
Go to top of page