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

Washington Co., Maryland, USAi
Regional Level Types
Washington Co.County
MarylandState
USACountry

This page is currently not sponsored. Click here to sponsor this page.
Key
Lock Map
Locality type:
Largest Settlements:
PlacePopulation
Hagerstown40,432 (2017)
Halfway10,701 (2011)
Robinwood6,918 (2017)
Fountainhead-Orchard Hills5,666 (2011)
Boonsboro3,455 (2017)
Maugansville3,071 (2011)
Other Languages:
French:
comté de Washington, Maryland, États-Unis
German:
Washington County, Maryland, Vereinigte Staaten
Italian:
contea di Washington, Maryland, Stati Uniti d'America
Russian:
Вашингтон, Мэриленд, Соединённые Штаты Америки
Simplified Chinese:
華盛頓縣, 马里兰州, 美国
Spanish:
Condado de Washington, Maryland, Estados Unidos
Albanian:
Washington County, Maryland, Shtetet e Bashkuara të Amerikës
Arabic:
مقاطعة واشنطن, ماريلند, الولايات المتحدة
Armenian:
Վաշինգտոն շրջան, Մերիլենդ, Ամերիկայի Միացյալ Նահանգներ
Basque:
Washington konderria , Maryland
Bavarian:
Washington County, Maryland, Vaoanigte Stootn
Bengali:
ওয়াশিংটন কাউন্টি, মেরিল্যান্ড, মার্কিন যুক্তরাষ্ট্র
Bishnupriya Manipuri:
ৱাশিংটন কাউন্টি, মেরিল্যান্ড, তিলপারাষ্ট্র
Bulgarian:
Вашингтон, Мериленд, Съединени американски щати
Cebuano:
Washington County , Maryland
Cornish:
Konteth Washington, Tir Maria, Statys Unys
Danish:
Washington County, Maryland, USA
Dutch:
Washington County, Maryland, Verenigde Staten
Esperanto:
Vaŝingtona Kantono, Marilando
Estonian:
Washingtoni maakond , Maryland, Ameerika Ühendriigid
Farsi/Persian:
شهرستان واشینگتن، مریلند, مریلند, ایالات متحده آمریکا
Georgian:
ვაშინგტონის ოლქი, მერილენდი, ამერიკის შეერთებული შტატები
Hebrew:
מחוז וושינגטון, מרילנד, ארצות הברית
Hungarian:
Washington megye, Maryland, Amerikai Egyesült Államok
Indonesian:
Washington County, Maryland, Amerika Serikat
Japanese:
ワシントン郡, メリーランド州, アメリカ合衆国
Low Saxon/Low German:
Washington County, Maryland, USA
Min Dong Chinese:
Washington Gông, Maryland
Minnan / Hokkien-Taiwanese:
Washington Kūn
Norwegian:
Washington County, Maryland, USA
Polish:
Hrabstwo Washington, Maryland, Stany Zjednoczone
Portuguese:
Condado de Washington, Maryland, Estados Unidos
Romanian:
Comitatul Washington, Maryland, Statele Unite ale Americii
Sardinian:
contea de Washington, Maryland, Istados Unidos de Amèrica
Scottish Gaelic:
Washington County, Maryland, Na Stàitean Aonaichte
Serbian:
Округ Вашингтон , Мериленд, Сједињене Америчке Државе
Serbo-Croatian:
Washington County, Maryland, Sjedinjene Američke Države
Swedish:
Washington County, Maryland, USA
Traditional Chinese:
華盛頓縣, 馬利蘭州, 美國
Turkish:
Washington County, Maryland, Amerika Birleşik Devletleri
Ukrainian:
Вашингтон, Меріленд, Сполучені Штати Америки
Urdu:
واشنگٹن کاؤنٹی، میری لینڈ, میری لینڈ, ریاستہائے متحدہ امریکا
Waray:
Condado han Washington, Maryland, Estados Unidos
Western Punjabi:
واشنگٹن کاؤنٹی، میری لینڈ, میری لینڈ, امریکہ


This county in western Maryland is underlain by sedimentary rocks that have been spectacularly folded and faulted by the late Paleozoic Allegheny orogeny (mountain building period). These folded rocks are beautifully displayed at the I-70 road cut at Sideling Hill. Differential erosion has sculpted these rocks into alternating high and low lands known as the scenic "Valley and Ridge Province" of the Appalachians. The rocks are generally unmineralized, little metamorphosed sandstone, shales, limestones and coal beds ranging in age from Ordovician to Pennsylvanian. They are at times profusely fossiliferous. Many of these lithologies are well exposed in road cuts, most notably the magnificent syncline exposed in the Sideling Hill road cut on I-68. Cambrian limestone abounds in the Hagerstown Valley, an extension of the Great Valley. On the eastern side of this valley, forming the eastern edge of the County, is the Blue Ridge Province, where older, more metamorphosed sedimentary rocks and volcanic rocks of Proterozoic to Cambrian age occur. These are well exposed in Greenbrier and Washington Monument State Parks on South Mountain, which is held up by the very resistant Cambrian Wevertown Quartzite. Some of the volcanic rocks host small native copper deposits.

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

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

8 valid minerals.

Detailed Mineral List:

Aragonite
Formula: CaCO3
Reference: Ostrander, C. W. & W. E. Price (1940) Minerals of Maryland: Natural History Society of Maryland , 92 p.
Baryte ?
Formula: BaSO4
Colour: Blue, green
Description: Small micro specimens found in Calcite or Dolomite pockets associated with quartz.
Reference: J. Wingard Personal observation
Calcite
Formula: CaCO3
'Clays'
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Dolomite
Formula: CaMg(CO3)2
Colour: White to Pink
Reference: J. Wingard Personal Observation 12-05
Fluorite
Formula: CaF2
Habit: Octahedral
Colour: light purple
Description: One specimen found on Calcite
Reference: J. Wingard personal observation
'Limonite'
Formula: (Fe,O,OH,H2O)
Localities: Reported from at least 10 localities in this region.
Pyrolusite
Formula: Mn4+O2
Reference: Maryland Geol. Sur., Vol. IX.
Quartz
Formula: SiO2
Quartz var: Blue Quartz
Formula: SiO2
Reference: Ostrander, C. W. & W. E. Price (1940) Minerals of Maryland: Natural History Society of Maryland , 92 p.
Quartz var: Smoky Quartz
Formula: SiO2
Reference: J. Wingard personal observation
Strontianite
Formula: SrCO3
Reference: Edith Trybalski

List of minerals arranged by Strunz 10th Edition classification

Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Pyrolusite4.DB.05Mn4+O2
Quartz4.DA.05SiO2
var: Blue Quartz4.DA.05SiO2
var: Smoky Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Aragonite5.AB.15CaCO3
Calcite5.AB.05CaCO3
Dolomite5.AB.10CaMg(CO3)2
Strontianite5.AB.15SrCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Baryte ?7.AD.35BaSO4
Unclassified Minerals, Rocks, etc.
'Clays'-
'Limonite'-(Fe,O,OH,H2O)

List of minerals arranged by Dana 8th Edition classification

Group 4 - SIMPLE OXIDES
AX2
Pyrolusite4.4.1.4Mn4+O2
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Strontianite14.1.3.3SrCO3
AB(XO3)2
Dolomite14.2.1.1CaMg(CO3)2
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Baryte ?28.3.1.1BaSO4
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
Aragonite-CaCO3
'Clays'-
'Limonite'-(Fe,O,OH,H2O)
Quartz
var: Blue Quartz
-SiO2
var: Smoky Quartz-SiO2

List of minerals for each chemical element

HHydrogen
H Limonite(Fe,O,OH,H2O)
CCarbon
C CalciteCaCO3
C DolomiteCaMg(CO3)2
C StrontianiteSrCO3
C AragoniteCaCO3
OOxygen
O PyrolusiteMn4+O2
O CalciteCaCO3
O QuartzSiO2
O Quartz (var: Smoky Quartz)SiO2
O DolomiteCaMg(CO3)2
O Limonite(Fe,O,OH,H2O)
O StrontianiteSrCO3
O AragoniteCaCO3
O Quartz (var: Blue Quartz)SiO2
O BaryteBaSO4
FFluorine
F FluoriteCaF2
MgMagnesium
Mg DolomiteCaMg(CO3)2
SiSilicon
Si QuartzSiO2
Si Quartz (var: Smoky Quartz)SiO2
Si Quartz (var: Blue Quartz)SiO2
SSulfur
S BaryteBaSO4
CaCalcium
Ca CalciteCaCO3
Ca FluoriteCaF2
Ca DolomiteCaMg(CO3)2
Ca AragoniteCaCO3
MnManganese
Mn PyrolusiteMn4+O2
FeIron
Fe Limonite(Fe,O,OH,H2O)
SrStrontium
Sr StrontianiteSrCO3
BaBarium
Ba BaryteBaSO4

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Cloos, E. et. al. (1951) Washington County: Maryland Geological Survey: County Report, 333 p.
Brezinski, D. K. (1997) Lithostratigraphy of the western Blue Ridge cover rocks in Maryland: Maryland Geological Survey: Report of Investigations 55, 55 pages plus map.
Schmidt, M.F. & M. F. Schmidt Jr. (2010) Maryland's Geology: Schiffer Publications, 164 p.
Means, J. (2010) Roadside geology of Maryland, Delaware and Washington, D.C.: Wild Horizons Publishers, 346 p.

Other Databases

Wikipedia:https://en.wikipedia.org/wiki/Washington_County,_Maryland
Wikidata ID:Q511164
GeoNames ID:4372777

External Links

Geological Map of Garrett, Alleghany and Western Washington Counties, Maryland http://www.mgs.md.gov/geo/wmdgeomap.html

Geology of the Sideling Hill road cut: http://www.mgs.md.gov/esic/brochures/sideling.html


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. Public Relations by Blytheweigh.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2019, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: May 25, 2019 05:04:30
Go to top of page