Vote for your favorite mineral in #MinCup26! - Cuprite vs. Halite
While externally similar shapes, these two minerals are very different inside.
Log InRegister
Quick Links : The Mindat ManualThe Rock H. Currier Digital LibraryMindat Newsletter [Free Download]
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 EducatorsMindat ArticlesThe ElementsThe Rock H. Currier Digital LibraryGeologic TimeExplore Fossils
Minerals by PropertiesMinerals by ChemistryMineral Visual ExplorerAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral QuizTime Machine
Photo SearchPhoto GalleriesSearch by ColorPhoto Colour ExplorerNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Alexander Dam, Kauai Island, Kauai County, Hawaii, USAi
Regional Level Types
Alexander DamDam
Kauai IslandIsland
Kauai CountyCounty
HawaiiState
USACountry

This page is currently not sponsored. Click here to sponsor this page.
PhotosMapsSearch
Latitude & Longitude (WGS84):
21° 57' 26'' North , 159° 31' 32'' West
Latitude & Longitude (decimal):
21.95741,-159.52566
GeoHash:
G#: 87yscvhzn
GRN:
N15W105
Type:
Dam
Köppen climate type:
As : Tropical dry savanna climate
Nearest Settlements:
PlacePopulationDistance
Kalāheo4,595 (2017)3.7km
Lawai2,363 (2016)4.6km
‘Ōma‘o1,301 (2015)5.2km
Koloa2,144 (2017)8.0km
Hanapēpē Heights2,692 (2013)8.0km
Mindat Locality ID:
30704
Long-form identifier:
mindat:1:2:30704:9
GUID (UUID V4):
0


Ankaratrite rock (a melanocratic basalt variety intermediate between limburgite and nepheline basalt) exposed during excavations for dam construction.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


6 valid minerals.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 5 - Nitrates and Carbonates
ⓘAragonite5.AB.15CaCO3
Group 9 - Silicates
ⓘForsterite9.AC.05Mg2SiO4
ⓘAugite9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6
ⓘAllophane9.ED.20(Al2O3)(SiO2)1.3-2 · 2.5-3H2O
ⓘNepheline ?9.FA.05Na3K(Al4Si4O16)
ⓘGismondine-Ca9.GC.05CaAl2Si2O8 · 4H2O
Unclassified
ⓘ'Stilbite Subgroup'-M6-7[Al8-9Si27-28O72] · nH2O
ⓘ'Gismondine Subgroup'-
ⓘ'Hydronephelite'-

List of minerals for each chemical element

HHydrogen
Hⓘ Allophane(Al2O3)(SiO2)1.3-2 · 2.5-3H2O
Hⓘ Gismondine-CaCaAl2Si2O8 · 4H2O
Hⓘ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
CCarbon
Cⓘ AragoniteCaCO3
OOxygen
Oⓘ Allophane(Al2O3)(SiO2)1.3-2 · 2.5-3H2O
Oⓘ AragoniteCaCO3
Oⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Oⓘ ForsteriteMg2SiO4
Oⓘ Gismondine-CaCaAl2Si2O8 · 4H2O
Oⓘ NephelineNa3K(Al4Si4O16)
Oⓘ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
NaSodium
Naⓘ NephelineNa3K(Al4Si4O16)
MgMagnesium
Mgⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Mgⓘ ForsteriteMg2SiO4
AlAluminium
Alⓘ Allophane(Al2O3)(SiO2)1.3-2 · 2.5-3H2O
Alⓘ Gismondine-CaCaAl2Si2O8 · 4H2O
Alⓘ NephelineNa3K(Al4Si4O16)
Alⓘ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
SiSilicon
Siⓘ Allophane(Al2O3)(SiO2)1.3-2 · 2.5-3H2O
Siⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Siⓘ ForsteriteMg2SiO4
Siⓘ Gismondine-CaCaAl2Si2O8 · 4H2O
Siⓘ NephelineNa3K(Al4Si4O16)
Siⓘ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
KPotassium
Kⓘ NephelineNa3K(Al4Si4O16)
CaCalcium
Caⓘ AragoniteCaCO3
Caⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Caⓘ Gismondine-CaCaAl2Si2O8 · 4H2O
FeIron
Feⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6

Other Regions, Features and Areas containing this locality

North AmericaContinent
Pacific Ocean
Pacific PlateTectonic Plate

This page contains all mineral locality references listed on mindat.org. 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 mindat.org 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.
Quick NavTopMineral ListOther Regions
 
and/or  
Mindat.org® is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Mindat® and mindat.org® are registered trademarks of the Hudson Institute of Mineralogy.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2026, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph and Ida Chau.
Content on this site may not be used to train, fine-tune, or otherwise develop artificial intelligence or machine learning models without prior written permission - see our Terms & Conditions.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: September 29, 2026 04:32:20 Page updated: August 9, 2025 01:20:38
Go to top of page