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Northern pit, Hollofield Gabbro Quarries, Hollofield, Baltimore County, Maryland, USAi
Regional Level Types
Northern pitQuarry (Abandoned)
Hollofield Gabbro QuarriesGroup of Quarries (Overgrown)
HollofieldUnincorporated Area
Baltimore CountyCounty
MarylandState
USACountry

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Latitude & Longitude (WGS84):
39° 18' 44'' North , 76° 47' 31'' West
Latitude & Longitude (decimal):
39.31232,-76.79195
GeoHash:
G#: dqcrss9fc
GRN:
N27W43
Type:
Quarry (Abandoned) - last checked 2022
Köppen climate type:
Cfa : Humid subtropical climate
Nearest Settlements:
PlacePopulationDistance
Milford Mill29,042 (2011)4.4km
Ellicott City65,834 (2011)5.0km
Woodlawn37,879 (2011)5.6km
Randallstown32,430 (2011)6.1km
Lochearn25,333 (2011)6.8km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Central Maryland Rock and Mineral Collectors ExchangeElkridge, Maryland13km
Baltimore Mineral SocietyBaltimore, Maryland16km
Chesapeake Gem & Mineral SocietyBaltimore, Maryland16km
Gem Cutters Guild of Baltimore, Inc.Baltimore, Maryland16km
Gem, Lapidary, and Mineral Society of Montgomery County, MD., Inc.Rockville, Maryland40km
Mindat Locality ID:
422371
Long-form identifier:
mindat:1:2:422371:2
GUID (UUID V4):
0


Northern quarry, in gabbro and meta-gabbro, smallest and youngest of two quarries in the area.

Located approximately 200 feet north of the Hollofield bridge.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


3 valid minerals.

Detailed Mineral List:

ⓘ 'Amphibole Supergroup'
Formula: AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
References:
Stuart Herring CollectionIdentified by Stuart Herring: Visual Identification
ⓘ 'Chlorite Group'
References:
Stuart Herring CollectionIdentified by Stuart Herring: Visual Identification
ⓘ Enstatite ?
Formula: Mg2Si2O6
References:
Stuart Herring CollectionIdentified by Stuart Herring: Visual Identification
ⓘ Pyrite
Formula: FeS2
References:
Stuart Herring CollectionIdentified by Stuart Herring: Visual Identification
ⓘ Quartz
Formula: SiO2
References:
Stuart Herring CollectionIdentified by Stuart Herring: Visual Identification

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘPyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
ⓘQuartz4.DA.05SiO2
Group 9 - Silicates
ⓘEnstatite ?9.DA.05Mg2Si2O6
Unclassified
ⓘ'Amphibole Supergroup'-AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
ⓘ'Chlorite Group'-

List of minerals for each chemical element

HHydrogen
Hⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
OOxygen
Oⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Oⓘ EnstatiteMg2Si2O6
Oⓘ QuartzSiO2
FFluorine
Fⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
MgMagnesium
Mgⓘ EnstatiteMg2Si2O6
AlAluminium
Alⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
SiSilicon
Siⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Siⓘ EnstatiteMg2Si2O6
Siⓘ QuartzSiO2
SSulfur
Sⓘ PyriteFeS2
ClChlorine
Clⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
TiTitanium
Tiⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
FeIron
Feⓘ PyriteFeS2

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America 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.
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