ALMOST THERE!. Help us with a final push needed to keep mindat.org running. Click here to help.
Catawiki are hosting a mindat.org benefit auction. All proceeds to mindat.org! BID NOW
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 EducatorsMindat Articles
Minerals by PropertiesMinerals by ChemistryAdvanced 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 CompaniesStatisticsThe ElementsUsersBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Guam, USAi
Regional Level Types
GuamUnincorporated and Organized Territory
USACountry

This page is currently not sponsored. Click here to sponsor this page.
Key
Lock Map
Area:541 km2
Locality type:Unincorporated and Organized Territory


The Marianas Islands are composed of two U.S. jurisdictions: the territory of Guam and the Commonwealth of the Northern Mariana Islands (separate locality).
Guam, the largest and southernmost of the Mariana Islands in the Western Pacific Ocean, is divided into 19 municipalities.

Geologically, the northern part of the island is a forested coralline limestone plateau while the south contains volcanic peaks covered in forest and grassland.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

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

7 valid minerals. 1 (TL) - type locality of valid minerals.

Detailed Mineral List:

Analcime
Formula: Na(AlSi2O6) · H2O
'Apophyllite'
Calcite
Formula: CaCO3
Goethite
Formula: α-Fe3+O(OH)
'Halloysite'
Formula: Al2(Si2O5)(OH)4
'Heulandite subgroup'
Montmorillonite
Formula: (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Natrolite
Formula: Na2Al2Si3O10 · 2H2O
Nordstrandite (TL)
Formula: Al(OH)3
Reference: Nature,(1962) 196, 265-266; Am Min 50:1029-1037
Quartz
Formula: SiO2

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
'Goethite'4.00.α-Fe3+O(OH)
'Nordstrandite' (TL)4.FE.10Al(OH)3
'Quartz'4.DA.05SiO2
Group 5 - Nitrates and Carbonates
'Calcite'5.AB.05CaCO3
Group 9 - Silicates
'Analcime'9.GB.05Na(AlSi2O6) · H2O
'Halloysite'9.ED.10Al2(Si2O5)(OH)4
'Montmorillonite'9.EC.40(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
'Natrolite'9.GA.05Na2Al2Si3O10 · 2H2O
Unclassified Minerals, Rocks, etc.
'Apophyllite'-
'Heulandite subgroup'-

List of minerals arranged by Dana 8th Edition classification

Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
X(OH)3
Nordstrandite (TL)6.3.3.1Al(OH)3
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 1:1 layers
'Halloysite'71.1.1.4Al2(Si2O5)(OH)4
Sheets of 6-membered rings with 2:1 clays
Montmorillonite71.3.1a.2(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Group 77 - TECTOSILICATES Zeolites
Zeolite group - True zeolites
Analcime77.1.1.1Na(AlSi2O6) · H2O
Natrolite77.1.5.1Na2Al2Si3O10 · 2H2O
Unclassified Minerals, Rocks, etc.
'Apophyllite'-
'Heulandite subgroup'-

List of minerals for each chemical element

HHydrogen
H AnalcimeNa(AlSi2O6) · H2O
H Goethiteα-Fe3+O(OH)
H HalloysiteAl2(Si2O5)(OH)4
H Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
H NatroliteNa2Al2Si3O10 · 2H2O
H NordstranditeAl(OH)3
CCarbon
C CalciteCaCO3
OOxygen
O AnalcimeNa(AlSi2O6) · H2O
O CalciteCaCO3
O Goethiteα-Fe3+O(OH)
O HalloysiteAl2(Si2O5)(OH)4
O Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
O NatroliteNa2Al2Si3O10 · 2H2O
O NordstranditeAl(OH)3
O QuartzSiO2
NaSodium
Na AnalcimeNa(AlSi2O6) · H2O
Na Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Na NatroliteNa2Al2Si3O10 · 2H2O
MgMagnesium
Mg Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
AlAluminium
Al AnalcimeNa(AlSi2O6) · H2O
Al HalloysiteAl2(Si2O5)(OH)4
Al Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Al NatroliteNa2Al2Si3O10 · 2H2O
Al NordstranditeAl(OH)3
SiSilicon
Si AnalcimeNa(AlSi2O6) · H2O
Si HalloysiteAl2(Si2O5)(OH)4
Si Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Si NatroliteNa2Al2Si3O10 · 2H2O
Si QuartzSiO2
CaCalcium
Ca CalciteCaCO3
Ca Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
FeIron
Fe Goethiteα-Fe3+O(OH)

Localities in this Region
Show map


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.
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2018, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: December 15, 2018 19:20:02 Page generated: December 7, 2018 05:13:24
Go to top of page