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Woodlawn Quarry, Wilmington, New Castle Co., Delaware, USAi
Regional Level Types
Woodlawn QuarryQuarry
Wilmington- not defined -
New Castle Co.County
DelawareState
USACountry

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Key
Lock Map
Latitude & Longitude (WGS84): 39° 49' 47'' North , 75° 34' 16'' West
Latitude & Longitude (decimal): 39.82988,-75.57127
GeoHash:G#: dr4686f9v
Locality type:Quarry
Köppen climate type:Cfa : Humid subtropical climate
Nearest Settlements:
PlacePopulationDistance
Greenville2,326 (2011)6.1km
Ardencroft231 (2011)7.4km
Arden450 (2017)7.6km
Ardentown272 (2017)7.9km
Bellefonte1,193 (2011)8.8km


A feldspar quarry operated 1850 to 1910. Previously administered by the Woodlawn Trustee's. As of March 2013, designated by United States President Barack Obama as a National Monument. No further collecting at this site is permitted by federal law.

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 at this locality.


Mineral List


5 valid minerals.

Detailed Mineral List:

'Albite-Anorthite Series'
Reference: Delaware Geological Survey
Almandine ?
Formula: Fe2+3Al2(SiO4)3
Habit: crude dodecahedral
Colour: very dark red/black
Fluorescence: none
Description: From my personal mineral experience and my specimens from this site, the garnets appear to be almandine. Small crystals are considered rare and a lucky find, so these large crystals (up to over 1") are probably the best from the locale.
Reference: "Arthur Koch - collection"
Beryl
Formula: Be3Al2(Si6O18)
Reference: Delaware Geological Survey
Beryl var: Aquamarine
Formula: Be3Al2Si6O18
Reference: Delaware Geological Survey
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: Delaware Geological Survey
Microcline
Formula: K(AlSi3O8)
Reference: Delaware Geological Survey
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Delaware Geological Survey
Quartz
Formula: SiO2
Reference: Delaware Geological Survey
Quartz var: Smoky Quartz
Formula: SiO2
Reference: Delaware Geological Survey

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
var: Smoky Quartz4.DA.05SiO2
Group 9 - Silicates
Almandine ?9.AD.25Fe2+3Al2(SiO4)3
Beryl9.CJ.05Be3Al2(Si6O18)
var: Aquamarine9.CJ.05Be3Al2Si6O18
Microcline9.FA.30K(AlSi3O8)
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Unclassified Minerals, Rocks, etc.
'Albite-Anorthite Series'-
'Garnet Group'-X3Z2(SiO4)3

List of minerals arranged by Dana 8th Edition classification

Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Almandine ?51.4.3a.2Fe2+3Al2(SiO4)3
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
Beryl61.1.1.1Be3Al2(Si6O18)
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Microcline76.1.1.5K(AlSi3O8)
Unclassified Minerals, Mixtures, etc.
'Albite-Anorthite Series'-
Beryl
var: Aquamarine
-Be3Al2Si6O18
'Garnet Group'-X3Z2(SiO4)3
Quartz
var: Smoky Quartz
-SiO2

List of minerals for each chemical element

HHydrogen
H MuscoviteKAl2(AlSi3O10)(OH)2
BeBeryllium
Be BerylBe3Al2(Si6O18)
Be Beryl (var: Aquamarine)Be3Al2Si6O18
OOxygen
O MicroclineK(AlSi3O8)
O QuartzSiO2
O Quartz (var: Smoky Quartz)SiO2
O MuscoviteKAl2(AlSi3O10)(OH)2
O Garnet GroupX3Z2(SiO4)3
O BerylBe3Al2(Si6O18)
O Beryl (var: Aquamarine)Be3Al2Si6O18
O AlmandineFe32+Al2(SiO4)3
AlAluminium
Al MicroclineK(AlSi3O8)
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al BerylBe3Al2(Si6O18)
Al Beryl (var: Aquamarine)Be3Al2Si6O18
Al AlmandineFe32+Al2(SiO4)3
SiSilicon
Si MicroclineK(AlSi3O8)
Si QuartzSiO2
Si Quartz (var: Smoky Quartz)SiO2
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si Garnet GroupX3Z2(SiO4)3
Si BerylBe3Al2(Si6O18)
Si Beryl (var: Aquamarine)Be3Al2Si6O18
Si AlmandineFe32+Al2(SiO4)3
KPotassium
K MicroclineK(AlSi3O8)
K MuscoviteKAl2(AlSi3O10)(OH)2
FeIron
Fe AlmandineFe32+Al2(SiO4)3

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Paleozoic
251.902 - 541 Ma



ID: 2792116
Wissahickon Schist

Age: Phanerozoic (251.902 - 541 Ma)

Stratigraphic Name: Wissahickon Schist

Description: Dense micaceous schist, gneiss and migmatite.

Comments: Paleozoic(?), Lower Paleozoic(?), Glenarm Series Original map source: Spoljaric, Nenad and Jordan, Robert R., 1966, Generalized Geologic Map of Delaware SP4, State of Delaware, Delaware Geological Survey, scale ca. 1:300,000. Digitized by the Water Resources Division of the U.S. Geological Survey in the mid 1990's.

Lithology: Major:{schist,gneiss}, Minor:{migmatite}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Cambrian
485.4 - 541 Ma



ID: 3191144
Paleozoic volcanic rocks

Age: Cambrian (485.4 - 541 Ma)

Lithology: Volcanic rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

External Links



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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