Vote for your favorite mineral in #MinCup26! - Quartz vs. Asagiite
It's a classic vs a newbie as the most common named mineral in the crust Quartz is up against an exceedingly-rare sea foam-green mineral discovered just a few years ago Asagiite.
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Hoopes Dam, New Castle County, Delaware, USAi
Regional Level Types
Hoopes DamDam
New Castle CountyCounty
DelawareState
USACountry

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PhotosMapsSearch
02488040017272323356348.jpg
Sillimanite, etc.

Hoopes Dam, New Castle County, Delaware, USA
02488040017272323356348.jpg
Sillimanite, etc.

Hoopes Dam, New Castle County, Delaware, USA
02655280017272033903780.jpg
Sillimanite, etc.

Hoopes Dam, New Castle County, Delaware, USA
Type:
Dam
Largest Settlements:
PlacePopulation
Greenville2,326 (2011)
Mindat Locality ID:
249176
Long-form identifier:
mindat:1:2:249176:2
GUID (UUID V4):
0
Other Languages:
View 29 more...
French:
Greenville, Comté de New Castle, Delaware, États-Unis
German:
Greenville, New Castle County, Delaware, Vereinigte Staaten
Italian:
Greenville, Contea di New Castle, Delaware, Stati Uniti d'America
Russian:
Гринвилл , Нью-Касл, Делавэр, Соединённые Штаты Америки
Simplified Chinese:
格林維爾 , 紐卡斯爾縣, 特拉华州, 美国
Spanish:
Greenville, Condado de New Castle, Delaware, Estados Unidos
Arabic:
غرينفيل , مقاطعة نيو كاسل, ديلاوير, الولايات المتحدة
Asturian:
Greenville, Delaware, Estaos Xuníos d'América
Basque:
Greenville , New Castle konderria, Delaware
Belarusian (Tarashkevitsa):
Грынвіль, Дэлаўэр, Злучаныя Штаты Амэрыкі
Catalan:
Greenville, Delaware, Estats Units d’Amèrica
Cebuano:
Greenville, New Castle County, Delaware
Chechen:
Гринвилл , Делавэр, Америкин Цхьаьнатоьхна Штаташ
Croatian:
Greenville , New Castle, Delaware, Sjedinjene Američke Države
Dutch:
Greenville, New Castle County, Delaware, Verenigde Staten
Farsi/Persian:
گرینویل، دلاور, شهرستان نیوکاسل، دلاویر, دلاور, ایالات متحده آمریکا
Hebrew:
גרינוויל, דלאוור, ארצות הברית
Hungarian:
Greenville, New Castle megye, Delaware, Amerikai Egyesült Államok
Irish Gaelic:
Greenville, Contae New Castle, Delaware, Stáit Aontaithe Mheiriceá
Japanese:
グリーンビル , ニューキャッスル郡, デラウェア州, アメリカ合衆国
Ladin:
Greenville
Minnan / Hokkien-Taiwanese:
Greenville
Newar / Nepal Bhasa:
ग्रीनभिल, देलावेर, संयुक्त राज्य अमेरिका
Polish:
Greenville, Hrabstwo New Castle, Delaware, Stany Zjednoczone
Portuguese:
Greenville, Condado de New Castle, Delaware, Estados Unidos
Scottish Gaelic:
Greenville, Delaware, Na Stàitean Aonaichte
Serbian:
Гринвил , Округ Њу Касл, Делавер, Сједињене Америчке Државе
Serbo-Croatian:
Greenville, New Castle County, Delaware, Sjedinjene Američke Države
South Azerbaijani:
قرینویل، دلاویر, دلاویر ایالتی, آمریکا بیرلشمیش ایالتلری
Swedish:
Greenville, New Castle County, Delaware, USA
Tatar:
Гринвилл , Делавэр, Америка Кушма Штатлары
Ukrainian:
Грінвілл , Нью-Касл, Делавер, Сполучені Штати Америки
Urdu:
گرینویل، ڈیلاویئر, نیو کیسل کاؤنٹی، ڈیلاویئر, ڈیلاویئر, ریاستہائے متحدہ امریکا
Uzbek (Latin Script):
Greenville, Delaver, Amerika Qoʻshma Shtatlari
Volapük:
Greenville, Delaware, Lamerikän


Hoopes Dam is located west of, but not within, Greenville, Delaware. Material for the dam apparently came from quarries in Wissahickon Schist located about 575 meters SW of the dam. Coordinates are for the dam, but specimens may have been collected at the quarries.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


3 valid minerals.

Detailed Mineral List:

ⓘ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Habit: massive folia
Colour: black
ⓘ Chromite
Formula: Fe2+Cr3+2O4
Habit: massive
Colour: metallic black
Description: Probably magnesiochromite
ⓘ Sillimanite
Formula: Al2(SiO4)O
Habit: massive, striated
Colour: gray to pale olive green
ⓘ Talc
Formula: Mg3Si4O10(OH)2
Habit: massive folia
Colour: white

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘChromite4.BB.05Fe2+Cr3+2O4
Group 9 - Silicates
ⓘSillimanite9.AF.05Al2(SiO4)O
ⓘTalc9.EC.05Mg3Si4O10(OH)2
Unclassified
ⓘ'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2

List of minerals for each chemical element

HHydrogen
Hⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hⓘ TalcMg3Si4O10(OH)2
OOxygen
Oⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oⓘ ChromiteFe2+Cr23+O4
Oⓘ SillimaniteAl2(SiO4)O
Oⓘ TalcMg3Si4O10(OH)2
FFluorine
Fⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
MgMagnesium
Mgⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Mgⓘ TalcMg3Si4O10(OH)2
AlAluminium
Alⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alⓘ SillimaniteAl2(SiO4)O
SiSilicon
Siⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siⓘ SillimaniteAl2(SiO4)O
Siⓘ TalcMg3Si4O10(OH)2
KPotassium
Kⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
TiTitanium
Tiⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
CrChromium
Crⓘ ChromiteFe2+Cr23+O4
FeIron
Feⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feⓘ ChromiteFe2+Cr23+O4

Fossils

This region is too big or complex to display the fossil list, try looking at smaller subregions.
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