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Morgan Quarry (Upper Noyes Mountain Quarry; Upper Harvard Quarry), Greenwood, Oxford Co., Maine, USAi
Regional Level Types
Morgan Quarry (Upper Noyes Mountain Quarry; Upper Harvard Quarry)Quarry
Greenwood- not defined -
Oxford Co.County
MaineState
USACountry

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Morgan Quarry upper pit (Upper Noyes Mountain, Upper Harvard Quarry) in Maine

Morgan Quarry, Greenwood, Oxford Co., Maine, USA
Latitude & Longitude (WGS84): 44° 17' 24'' North , 70° 38' 30'' West
Latitude & Longitude (decimal): 44.29000,-70.64167
GeoHash:G#: drvgbw8rc
Locality type:Quarry
Köppen climate type:Dfb : Warm-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Greenwood834 (2017)3.2km
West Paris1,790 (2017)6.6km
Woodstock1,263 (2017)9.8km
Norway2,748 (2017)11.4km
Paris5,073 (2017)11.7km


Granite Pegmatite. The Morgan Prospect is located immediately up-slope from the historic Noyes Mountain Quarry and produced excellent parallel growth smoky quartz crystals and some very good purple fluorapatite crystals. This is not the famous Noyes Mountain Quarry (Harvard Quarry), but many collectors do not realize that the two closely spaced occurrences have slightly different names. It was worked in the middle 1990s through about 2005. Many purples fluorapatite specimens, in particular, have been mis-attributed to the more famous nearby occurrence, but there are differences in the crystals and the matrix.

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


26 valid minerals.

Detailed Mineral List:

Albite
Formula: Na(AlSi3O8)
Reference: Maine Pegmatite Workshop 2004
Albite var: Cleavelandite
Formula: Na(AlSi3O8)
Reference: Maine Pegmatite Workshop 2004
Almandine
Formula: Fe2+3Al2(SiO4)3
Reference: Maine Pegmatite Workshop 2004
Arsenopyrite
Formula: FeAsS
Reference: Maine Pegmatite Workshop 2004
Autunite
Formula: Ca(UO2)2(PO4)2 · 11H2O
Reference: Maine Pegmatite Workshop 2004
Bertrandite
Formula: Be4(Si2O7)(OH)2
Reference: Maine Pegmatite Workshop 2004
'Biotite'
Reference: Maine Pegmatite Workshop 2004
Cookeite
Formula: (Al2Li)Al2(AlSi3O10)(OH)8
Reference: Maine Pegmatite Workshop 2004
Diopside
Formula: CaMgSi2O6
Reference: Maine Pegmatite Workshop 2004
Elbaite
Formula: Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Reference: Maine Pegmatite Workshop 2004
Fairfieldite
Formula: Ca2Mn2+(PO4)2 · 2H2O
Reference: Maine Pegmatite Workshop 2004
Fluorapatite
Formula: Ca5(PO4)3F
Reference: Maine Pegmatite Workshop 2004
Gahnite
Formula: ZnAl2O4
Reference: Maine Pegmatite Workshop 2004
Goethite
Formula: α-Fe3+O(OH)
Reference: Maine Pegmatite Workshop 2004
Kaolinite
Formula: Al2(Si2O5)(OH)4
Reference: Maine Pegmatite Workshop 2004
'Lepidolite'
Reference: Maine Pegmatite Workshop 2004
Microcline
Formula: K(AlSi3O8)
Reference: Maine Pegmatite Workshop 2004
Montebrasite
Formula: LiAl(PO4)(OH)
Reference: Maine Pegmatite Workshop 2004
Montmorillonite
Formula: (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Reference: Maine Pegmatite Workshop 2004
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Kevin Czaja Collection
Quartz
Formula: SiO2
Quartz var: Sceptre Quartz
Formula: SiO2
Schorl
Formula: Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Reference: Kevin Czaja Collection
Siderite
Formula: FeCO3
Reference: Maine Pegmatite Workshop 2004
Spodumene
Formula: LiAlSi2O6
Reference: Maine Pegmatite Workshop 2004
Todorokite
Formula: (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
Reference: Maine Pegmatite Workshop 2004
Triphylite
Formula: LiFe2+PO4
Reference: Maine Pegmatite Workshop 2004
Vesuvianite
Formula: (Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Reference: Maine Pegmatite Workshop 2004
Vivianite
Formula: Fe2+3(PO4)2 · 8H2O
Reference: Maine Pegmatite Workshop 2004
Zircon
Formula: Zr(SiO4)
Reference: Maine Pegmatite Workshop 2004

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Arsenopyrite2.EB.20FeAsS
Group 4 - Oxides and Hydroxides
Gahnite4.BB.05ZnAl2O4
Goethite4.00.α-Fe3+O(OH)
Quartz4.DA.05SiO2
var: Sceptre Quartz4.DA.05SiO2
Todorokite4.DK.10(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
Group 5 - Nitrates and Carbonates
Siderite5.AB.05FeCO3
Group 8 - Phosphates, Arsenates and Vanadates
Autunite8.EB.05Ca(UO2)2(PO4)2 · 11H2O
Fairfieldite8.CG.05Ca2Mn2+(PO4)2 · 2H2O
Fluorapatite8.BN.05Ca5(PO4)3F
Montebrasite8.BB.05LiAl(PO4)(OH)
Triphylite8.AB.10LiFe2+PO4
Vivianite8.CE.40Fe2+3(PO4)2 · 8H2O
Group 9 - Silicates
Albite9.FA.35Na(AlSi3O8)
var: Cleavelandite9.FA.35Na(AlSi3O8)
Almandine9.AD.25Fe2+3Al2(SiO4)3
Bertrandite9.BD.05Be4(Si2O7)(OH)2
Cookeite9.EC.55(Al2Li)Al2(AlSi3O10)(OH)8
Diopside9.DA.15CaMgSi2O6
Elbaite9.CK.05Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Kaolinite9.ED.05Al2(Si2O5)(OH)4
Microcline9.FA.30K(AlSi3O8)
Montmorillonite9.EC.40(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Schorl9.CK.05Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Spodumene9.DA.30LiAlSi2O6
Vesuvianite9.BG.35(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Zircon9.AD.30Zr(SiO4)
Unclassified Minerals, Rocks, etc.
'Biotite'-
'Lepidolite'-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:2
Arsenopyrite2.12.4.1FeAsS
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Group 7 - MULTIPLE OXIDES
AB2X4
Gahnite7.2.1.4ZnAl2O4
AB3X7
Todorokite7.8.1.1(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Siderite14.1.1.3FeCO3
Group 38 - ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
ABXO4
Triphylite38.1.1.1LiFe2+PO4
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
AB2(XO4)2·xH2O, containing (UO2)2+
Autunite40.2a.1.1Ca(UO2)2(PO4)2 · 11H2O
Fairfieldite40.2.2.1Ca2Mn2+(PO4)2 · 2H2O
A3(XO4)2·xH2O
Vivianite40.3.6.1Fe2+3(PO4)2 · 8H2O
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)2(XO4)Zq
Montebrasite41.5.8.2LiAl(PO4)(OH)
A5(XO4)3Zq
Fluorapatite41.8.1.1Ca5(PO4)3F
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Almandine51.4.3a.2Fe2+3Al2(SiO4)3
Insular SiO4 Groups Only with cations in >[6] coordination
Zircon51.5.2.1Zr(SiO4)
Group 56 - SOROSILICATES Si2O7 Groups, With Additional O, OH, F and H2O
Si2O7 Groups and O, OH, F, and H2O with cations in [4] coordination
Bertrandite56.1.1.1Be4(Si2O7)(OH)2
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Vesuvianite58.2.4.1(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with borate groups
Elbaite61.3.1.8Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Schorl61.3.1.10Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Diopside65.1.3a.1CaMgSi2O6
Spodumene65.1.4.1LiAlSi2O6
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Sheets of 6-membered rings with 2:1 clays
Montmorillonite71.3.1a.2(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Sheets of 6-membered rings interlayered 1:1, 2:1, and octahedra
Cookeite71.4.1.2(Al2Li)Al2(AlSi3O10)(OH)8
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
Albite76.1.3.1Na(AlSi3O8)
Microcline76.1.1.5K(AlSi3O8)
Unclassified Minerals, Mixtures, etc.
Albite
var: Cleavelandite
-Na(AlSi3O8)
'Biotite'-
Kaolinite-Al2(Si2O5)(OH)4
'Lepidolite'-
Quartz
var: Sceptre Quartz
-SiO2

List of minerals for each chemical element

HHydrogen
H Cookeite(Al2Li)Al2(AlSi3O10)(OH)8
H ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
H AutuniteCa(UO2)2(PO4)2 · 11H2O
H BertranditeBe4(Si2O7)(OH)2
H Goethiteα-Fe3+O(OH)
H Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
H FairfielditeCa2Mn2+(PO4)2 · 2H2O
H MontebrasiteLiAl(PO4)(OH)
H Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
H Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
H VivianiteFe32+(PO4)2 · 8H2O
H KaoliniteAl2(Si2O5)(OH)4
H SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
H MuscoviteKAl2(AlSi3O10)(OH)2
LiLithium
Li Cookeite(Al2Li)Al2(AlSi3O10)(OH)8
Li SpodumeneLiAlSi2O6
Li ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Li TriphyliteLiFe2+PO4
Li MontebrasiteLiAl(PO4)(OH)
BeBeryllium
Be BertranditeBe4(Si2O7)(OH)2
BBoron
B ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
B Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
B SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
CCarbon
C SideriteFeCO3
OOxygen
O Cookeite(Al2Li)Al2(AlSi3O10)(OH)8
O SideriteFeCO3
O AlmandineFe32+Al2(SiO4)3
O DiopsideCaMgSi2O6
O SpodumeneLiAlSi2O6
O ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
O AutuniteCa(UO2)2(PO4)2 · 11H2O
O TriphyliteLiFe2+PO4
O BertranditeBe4(Si2O7)(OH)2
O GahniteZnAl2O4
O ZirconZr(SiO4)
O Goethiteα-Fe3+O(OH)
O Albite (var: Cleavelandite)Na(AlSi3O8)
O MicroclineK(AlSi3O8)
O Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
O FairfielditeCa2Mn2+(PO4)2 · 2H2O
O FluorapatiteCa5(PO4)3F
O MontebrasiteLiAl(PO4)(OH)
O Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
O Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
O VivianiteFe32+(PO4)2 · 8H2O
O KaoliniteAl2(Si2O5)(OH)4
O SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
O MuscoviteKAl2(AlSi3O10)(OH)2
O QuartzSiO2
O Quartz (var: Sceptre Quartz)SiO2
O AlbiteNa(AlSi3O8)
FFluorine
F FluorapatiteCa5(PO4)3F
F Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
NaSodium
Na ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Na Albite (var: Cleavelandite)Na(AlSi3O8)
Na Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
Na Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Na Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Na SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Na AlbiteNa(AlSi3O8)
MgMagnesium
Mg DiopsideCaMgSi2O6
Mg Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
Mg Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Mg Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
AlAluminium
Al Cookeite(Al2Li)Al2(AlSi3O10)(OH)8
Al AlmandineFe32+Al2(SiO4)3
Al SpodumeneLiAlSi2O6
Al ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Al GahniteZnAl2O4
Al Albite (var: Cleavelandite)Na(AlSi3O8)
Al MicroclineK(AlSi3O8)
Al Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
Al MontebrasiteLiAl(PO4)(OH)
Al Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Al Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Al KaoliniteAl2(Si2O5)(OH)4
Al SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al AlbiteNa(AlSi3O8)
SiSilicon
Si Cookeite(Al2Li)Al2(AlSi3O10)(OH)8
Si AlmandineFe32+Al2(SiO4)3
Si DiopsideCaMgSi2O6
Si SpodumeneLiAlSi2O6
Si ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Si BertranditeBe4(Si2O7)(OH)2
Si ZirconZr(SiO4)
Si Albite (var: Cleavelandite)Na(AlSi3O8)
Si MicroclineK(AlSi3O8)
Si Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Si Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Si KaoliniteAl2(Si2O5)(OH)4
Si SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si QuartzSiO2
Si Quartz (var: Sceptre Quartz)SiO2
Si AlbiteNa(AlSi3O8)
PPhosphorus
P AutuniteCa(UO2)2(PO4)2 · 11H2O
P TriphyliteLiFe2+PO4
P FairfielditeCa2Mn2+(PO4)2 · 2H2O
P FluorapatiteCa5(PO4)3F
P MontebrasiteLiAl(PO4)(OH)
P VivianiteFe32+(PO4)2 · 8H2O
SSulfur
S ArsenopyriteFeAsS
KPotassium
K MicroclineK(AlSi3O8)
K Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca DiopsideCaMgSi2O6
Ca AutuniteCa(UO2)2(PO4)2 · 11H2O
Ca Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
Ca FairfielditeCa2Mn2+(PO4)2 · 2H2O
Ca FluorapatiteCa5(PO4)3F
Ca Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Ca Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
MnManganese
Mn Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
Mn FairfielditeCa2Mn2+(PO4)2 · 2H2O
FeIron
Fe SideriteFeCO3
Fe AlmandineFe32+Al2(SiO4)3
Fe ArsenopyriteFeAsS
Fe TriphyliteLiFe2+PO4
Fe Goethiteα-Fe3+O(OH)
Fe Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Fe VivianiteFe32+(PO4)2 · 8H2O
Fe SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
ZnZinc
Zn GahniteZnAl2O4
AsArsenic
As ArsenopyriteFeAsS
SrStrontium
Sr Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
ZrZirconium
Zr ZirconZr(SiO4)
BaBarium
Ba Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
UUranium
U AutuniteCa(UO2)2(PO4)2 · 11H2O

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

Devonian - Silurian
358.9 - 443.8 Ma



ID: 3185212
Paleozoic intrusive rocks

Age: Paleozoic (358.9 - 443.8 Ma)

Lithology: Intrusive igneous 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]

Llandovery
433.4 - 443.8 Ma



ID: 2870550
Silurian Sangerville Formation, Anasagunticook member

Age: Llandovery (433.4 - 443.8 Ma)

Stratigraphic Name: Anasagunticook Member

Description: Silurian Sangerville Formation Anasagunticook member

Comments: In western sequence of central Maine trough, divided into a main body, lower member near Woodstock (schist and granofels probably equivalent to member B), upper member near Woodstock (schist and granofels probably equivalent to member C), member A (in turn divided into gray shale and massive sandstone facies, massive sandstone facies, and polymict conglomerate facies), member B (in turn divided into quartz-rich, polymictic conglomerate facies and gray shale and sandstone facies), and member C (in turn divided into quartz conglomerate, sandstone, and gray shale; impure limestone and quartz conglomerate lenses; and upper gray shale and sandstone). (ME004) Unit description from USGS GEOLEX website (ME078). E - Epidote-amphibolite facies; AA - Low rank amphibolite facies; AB - Medium rank amphibolite facies; Protolith H - Lithic sandstone and conglomerate. Original map source: Digital bedrock data downloaded from Maine Office of GIS in September 2005; permission to redistribute these data granted by Dr. Robert Marvinney, State Geologist of Maine, in September 2006. Based on 1985 paper geologic map (Reference ME002).

Lithology: Major:{metasandstone}, Minor:{metasiltstone,slate,marble}

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]

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


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