Patapsco Glen Construction Site, Woodlawn, Baltimore County, Maryland, USAi
| Regional Level Types | |
|---|---|
| Patapsco Glen Construction Site | Construction Site (Built Over) |
| Woodlawn | Unincorporated Community |
| Baltimore County | County |
| Maryland | State |
| USA | Country |
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Latitude & Longitude (WGS84):
39° 18' 50'' North , 76° 46' 47'' West
Latitude & Longitude (decimal):
Type:
Construction Site (Built Over) - last checked 2024
Deposit first discovered:
2020
KΓΆppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Milford Mill | 29,042 (2011) | 3.9km |
| Woodlawn | 37,879 (2011) | 4.6km |
| Ellicott City | 65,834 (2011) | 5.4km |
| Lochearn | 25,333 (2011) | 5.8km |
| Randallstown | 32,430 (2011) | 6.1km |
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
Local clubs are the best way to get access to collecting localities
| Club | Location | Distance |
|---|---|---|
| Central Maryland Rock and Mineral Collectors Exchange | Elkridge, Maryland | 13km |
| Baltimore Mineral Society | Baltimore, Maryland | 15km |
| Chesapeake Gem & Mineral Society | Baltimore, Maryland | 15km |
| Gem Cutters Guild of Baltimore, Inc. | Baltimore, Maryland | 15km |
| Gem, Lapidary, and Mineral Society of Montgomery County, MD., Inc. | Rockville, Maryland | 41km |
Mindat Locality ID:
440784
Long-form identifier:
mindat:1:2:440784:6
GUID (UUID V4):
9b84e5a6-c864-4f91-bdb5-81619f342d13
A construction site started in 2020 for homes located in the Hollofield Layered Ultramafite. The site is located on private property and is built over.
"The Hollofield Layered Ultramafite consists of ultramafic and mafic rocks inter layered on a scale that varies from centimeters to tens of meters. Chief among these is actinofels and actinoschist comprised almost entirely of light green actinolite, generally as a tangled mass of fine needles, but in places coarser-grained and having a more granular appearance. With the addition of plagioclase, actinofels grades into plagioclaseactinolite amphibolite (metagabbro of earlier workers). Such interlayered amphibolite, either actinolitic or hornblendic, and very rarely bearing garnet, comprises one-third of the exposed formation. Less common is bluishblack, orange-weathering serpentinite generally with subordinate amphibole (metaperidotite of earlier geologists). Chlorite may occur in any of these three rock types, either as discrete flakes or as schistose zones. Talc is locally associated with serpentinite, and tremolite and anthophyllite with actinofels. In places the rocks contain relict pyroxene and olivine which provide direct evidence of the igneous origin of the formation. Characteristically, the Hollofield consists chiefly of actinofels with subordinate interlayered amphibolite and serpentinite, but certain areas can be outlined where serpentinite predominates; such areas have been mapped separately."
(Ref: William P. Crowley, (1976) Department of Natural Resources, Maryland Geological Survey. Report of Investigations 27, The Geology of the crystalline rocks near Baltimore and its bearing on the evolution of the eastern Maryland Piedmont, page 13)
Link: http://www.mgs.md.gov/publications/report_pages/RI_27.html
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| β Actinolite Formula: ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 References: Stuart Herring CollectionIdentified by Stuart Herring: Visual Identification |
| β 'Amphibole Supergroup' Formula: AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 References: Stuart Herring CollectionIdentified by Stuart Herring: Visual Identification |
| β Anthophyllite Formula: ◻{Mg2}{Mg5}(Si8O22)(OH)2 References: Stuart Herring CollectionIdentified by Stuart Herring: Visual Identification |
| β Calcite Formula: CaCO3 References: Stuart Herring CollectionIdentified by Stuart Herring: Visual Identification |
| β 'Chlorite Group' References: Stuart Herring CollectionIdentified by Stuart Herring: Visual Identification |
| β 'Feldspar Group' References: Stuart Herring CollectionIdentified by Stuart Herring: Visual Identification |
| β Forsterite Formula: Mg2SiO4 References: Stuart Herring CollectionIdentified by Stuart Herring: Visual Identification |
| β Forsterite var. Peridot Formula: Mg2SiO4 References: Stuart Herring CollectionIdentified by Stuart Herring: Visual Identification |
| β 'Manganese Oxides' References: Stuart Herring CollectionIdentified by Stuart Herring: Visual Identification |
| β 'Manganese Oxides var. Manganese Dendrites' References: Stuart Herring CollectionIdentified by Stuart Herring: Visual Identification |
| β 'Mica Group' References: Stuart Herring CollectionIdentified by Stuart Herring: Visual Identification |
| β Opal Formula: SiO2 · nH2O References: Stuart Herring CollectionIdentified by Stuart Herring: Visual Identification |
| β 'Pyroxene Group' Formula: ADSi2O6 References: Stuart Herring CollectionIdentified by Stuart Herring: Visual Identification |
| β Quartz Formula: SiO2 References: Stuart Herring CollectionIdentified by Stuart Herring: Visual Identification |
| β Quartz var. Chalcedony Formula: SiO2 References: Stuart Herring CollectionIdentified by Stuart Herring: Visual Identification |
| β 'Serpentine Subgroup' Formula: D3[Si2O5](OH)4 References: Stuart Herring CollectionIdentified by Stuart Herring: Visual Identification |
| β Talc Formula: Mg3Si4O10(OH)2 References: Stuart Herring CollectionIdentified by Stuart Herring: Visual Identification |
| β Titanite Formula: CaTi(SiO4)O References: Stuart Herring CollectionIdentified by Stuart Herring: Visual Identification |
| β Tremolite Formula: ◻Ca2Mg5(Si8O22)(OH)2 References: Stuart Herring CollectionIdentified by Stuart Herring: Visual Identification |
| β Zircon Formula: Zr(SiO4) References: Stuart Herring CollectionIdentified by Stuart Herring: Visual Identification |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| β | Quartz var. Chalcedony | 4.DA.05 | SiO2 |
| β | 4.DA.05 | SiO2 | |
| β | Opal | 4.DA.10 | SiO2 Β· nH2O |
| Group 5 - Nitrates and Carbonates | |||
| β | Calcite | 5.AB.05 | CaCO3 |
| Group 9 - Silicates | |||
| β | Forsterite var. Peridot | 9.AC.05 | Mg2SiO4 |
| β | 9.AC.05 | Mg2SiO4 | |
| β | Zircon | 9.AD.30 | Zr(SiO4) |
| β | Titanite | 9.AG.15 | CaTi(SiO4)O |
| β | Anthophyllite | 9.DD.05 | β»{Mg2}{Mg5}(Si8O22)(OH)2 |
| β | Actinolite | 9.DE.10 | β»Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| β | Tremolite | 9.DE.10 | β»Ca2Mg5(Si8O22)(OH)2 |
| β | Talc | 9.EC.05 | Mg3Si4O10(OH)2 |
| Unclassified | |||
| β | 'Amphibole Supergroup' | - | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| β | 'Feldspar Group' | - | |
| β | 'Mica Group' | - | |
| β | 'Chlorite Group' | - | |
| β | 'Pyroxene Group' | - | ADSi2O6 |
| β | 'Serpentine Subgroup' | - | D3[Si2O5](OH)4 |
| β | 'Manganese Oxides var. Manganese Dendrites' | - | |
| β | '' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | β Actinolite | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| H | β Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| H | β Anthophyllite | ◻{Mg2}{Mg5}(Si8O22)(OH)2 |
| H | β Opal | SiO2 · nH2O |
| H | β Talc | Mg3Si4O10(OH)2 |
| H | β Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
| H | β Serpentine Subgroup | D3[Si2O5](OH)4 |
| C | Carbon | |
| C | β Calcite | CaCO3 |
| O | Oxygen | |
| O | β Actinolite | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| O | β Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| O | β Anthophyllite | ◻{Mg2}{Mg5}(Si8O22)(OH)2 |
| O | β Calcite | CaCO3 |
| O | β Quartz var. Chalcedony | SiO2 |
| O | β Forsterite | Mg2SiO4 |
| O | β Opal | SiO2 · nH2O |
| O | β Quartz | SiO2 |
| O | β Talc | Mg3Si4O10(OH)2 |
| O | β Titanite | CaTi(SiO4)O |
| O | β Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
| O | β Zircon | Zr(SiO4) |
| O | β Forsterite var. Peridot | Mg2SiO4 |
| O | β Pyroxene Group | ADSi2O6 |
| O | β Serpentine Subgroup | D3[Si2O5](OH)4 |
| F | Fluorine | |
| F | β Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| Mg | Magnesium | |
| Mg | β Actinolite | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| Mg | β Anthophyllite | ◻{Mg2}{Mg5}(Si8O22)(OH)2 |
| Mg | β Forsterite | Mg2SiO4 |
| Mg | β Talc | Mg3Si4O10(OH)2 |
| Mg | β Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
| Mg | β Forsterite var. Peridot | Mg2SiO4 |
| Al | Aluminium | |
| Al | β Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| Si | Silicon | |
| Si | β Actinolite | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| Si | β Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| Si | β Anthophyllite | ◻{Mg2}{Mg5}(Si8O22)(OH)2 |
| Si | β Quartz var. Chalcedony | SiO2 |
| Si | β Forsterite | Mg2SiO4 |
| Si | β Opal | SiO2 · nH2O |
| Si | β Quartz | SiO2 |
| Si | β Talc | Mg3Si4O10(OH)2 |
| Si | β Titanite | CaTi(SiO4)O |
| Si | β Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
| Si | β Zircon | Zr(SiO4) |
| Si | β Forsterite var. Peridot | Mg2SiO4 |
| Si | β Pyroxene Group | ADSi2O6 |
| Si | β Serpentine Subgroup | D3[Si2O5](OH)4 |
| Cl | Chlorine | |
| Cl | β Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| Ca | Calcium | |
| Ca | β Actinolite | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| Ca | β Calcite | CaCO3 |
| Ca | β Titanite | CaTi(SiO4)O |
| Ca | β Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
| Ti | Titanium | |
| Ti | β Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| Ti | β Titanite | CaTi(SiO4)O |
| Fe | Iron | |
| Fe | β Actinolite | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| Zr | Zirconium | |
| Zr | β Zircon | Zr(SiO4) |
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Piedmontia DomainDomain
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References
Patapsco Glen Construction Site, Woodlawn, Baltimore County, Maryland, USA