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Eastern Concrete Materials Inc. Quarry (Raia Quarry; Cofrancisco Quarry; Hamburg Quarry), Hamburg, Sussex Co., New Jersey, USAi
Regional Level Types
Eastern Concrete Materials Inc. Quarry (Raia Quarry; Cofrancisco Quarry; Hamburg Quarry)Quarry
Hamburg- not defined -
Sussex Co.County
New JerseyState

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Latitude & Longitude (WGS84): 41° 10' 0'' North , 74° 34' 40'' West
Latitude & Longitude (decimal): 41.16667,-74.57778
GeoHash:G#: dr6fnynj5
Locality type:Quarry
Köppen climate type:Dfb : Warm-summer humid continental climate
Nearest Settlements:
Hamburg3,155 (2017)1.5km
Franklin4,855 (2017)5.0km
Sussex2,043 (2017)5.4km
Vernon Center1,713 (2017)6.6km
Ogdensburg2,286 (2017)9.5km

A quarry in Precambrian gneissic rock. Located East of State route 23 and North of State route 94.

Hamburg Quarry, currently (2007) operated by Eastern Concrete Materials, Inc. is located 5000 feet north of the intersection of Routes 23 and 94, just beyond the northern edge of the Boro. of Hamburg in Hardyston Township, New Jersey. The quarry is excavated in rocks of the Losee Metamorphic Suite (Volkert and Drake, 1999 ), a collection of lithologies that, at this location, is predominantly granulite facies quartz oligoclase gneiss, with local streaks of amphibolite, and post orogenic pegmatites. Along the margins of the property, especially along the northwest side of the old quarry, now mostly filled with slimes from the sand plant, the very sharp unconformity between the Proterozoic metamorphic rocks and the overlying Cambrian Leithville dolomite is well exposed. At Hamburg Quarry the Leithsville formation rests directly on the Precambrian rocks. The Hardyston Quartzite is essentially absent, represented only by abundant sand grains in the lowermost few inches of the dolomite.

Mineralogical interest in this quarry has only come about in the last few years. Sometime prior to 1996 a fracture filling vein of very coarsely crystalline, pinkish orange (salmon) calcite was exposed. Quarrying eventually exposed a strike length of over 2000 feet. Flanking this vein the gneiss was replaced by a banded skarn. The inner band was composed mainly of pyroxene (diopside – hedenburgite) with variable amounts of biotite and quartz. Locally, additional minor components of the mineral assemblage included pyrite, sphene, zircon and molybdenite. At the inner margin of the inner band and in the adjacent calcite vein filling, apatite was locally abundant. Apatite and pyroxene occurred as euhedral crystals up to 3 inches.

The outer band of the skarn is composed almost entirely of scapolite. The scapolite contains scattered, small, ragged inclusions of gneiss. The transition into unaltered gneiss, at the outer edge of the skarn, is abrupt.

The calcite-apatite-pyroxene vein at Hamburg Quarry bears many similarities to the carbonatitic vein-dikes of Quebec and Ontario, Canada (Lentz, 1998). In this author’s experience the visual similarities between the Hamburg Quarry vein and the Matte Zone at Yates Uranium Mine, north of Otter Lake, Que. are striking. Like the Canadian examples the Hamburg Quarry vein was likely emplaced during the period 1000 – 950 Ma when the region was intruded by pegmatites and experienced widespread hydrothermal activity (Volkert, et al, 2005)

In the current workings (late 2007) of the pit the vein seems to have terminated. New exposures of the down dip extension will probably be found if and when another lower level is begun.

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

15 valid minerals.

Detailed Mineral List:

Allanite-(Ce) ?
Formula: {CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Colour: Black
Description: In gneissic rock.
Reference: C. Lemanski, Jr. based on FOMS field trip data.
'Amphibole Supergroup'
Formula: AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Reference: Observed and collected by David Bernstein-May 2010.
Habit: Prismatic, doubly terminated
Description: Crystals to about 8 cm long in salmon-coloured calcite pods.
Reference: C. Lemanski, Jr. based on FOMS field trip data.
Reference: Warren Cummings, personal communication, 2007
Formula: CaCO3
Colour: Salmon-orange
Description: Massive, in pods in gneissic rock.
Reference: C. Lemanski, Jr. based on FOMS field trip data.
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Reference: Observed and collected by David Bernstein-May 2010.
Formula: CaMgSi2O6
Reference: Warren Cummings, personal communication, 2007
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: C. Lemanski, Jr. based on FOMS field trip data.
'Feldspar Group'
Reference: Observed and collected by David Bernstein-May 2010.
Formula: α-Fe3+O(OH)
Reference: Van King
Formula: CaFe2+Si2O6
Reference: C. Lemanski, Jr. based on FOMS field trip data.
Formula: Fe2+Fe3+2O4
Reference: Observed and collected by David Bernstein-May 2010.
Formula: Cu2(CO3)(OH)2
Reference: Observed and collected by David Bernstein-May 2010.
Formula: MoS2
Reference: Warren Cummings, personal communication, 2007
Formula: Mg3(SiO4)(F,OH)2
Reference: Dunn, P.J. (1995), Pt 2: 169.
Formula: FeS2
Reference: Observed and collected by David Bernstein-May 2010.
Formula: SiO2
Description: Crystals lining cavities in gneissic rock.
Reference: C. Lemanski, Jr. based on FOMS field trip data.
Reference: Dunn, P.J. (1995), Pt 2: 169.
Formula: CaTi(SiO4)O
Reference: Warren Cummings, personal communication, 2007
Formula: Zr(SiO4)
Reference: Warren Cummings, personal communication, 2007

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Group 4 - Oxides and Hydroxides
Group 5 - Nitrates and Carbonates
Group 9 - Silicates
Allanite-(Ce) ?9.BG.05b{CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Chrysocolla9.ED.20Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Unclassified Minerals, Rocks, etc.
'Amphibole Supergroup'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Feldspar Group'-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:2
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in >[6] coordination
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] coordination only
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
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)
Allanite-(Ce) ?58.2.1a.1{CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Group 74 - PHYLLOSILICATES Modulated Layers
Modulated Layers with joined strips
Chrysocolla74.3.2.1Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Unclassified Minerals, Mixtures, etc.
'Amphibole Supergroup'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Feldspar Group'-

List of minerals for each chemical element

H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
H MalachiteCu2(CO3)(OH)2
H ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
H Goethiteα-Fe3+O(OH)
H Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
C CalciteCaCO3
C MalachiteCu2(CO3)(OH)2
O NorbergiteMg3(SiO4)(F,OH)2
O CalciteCaCO3
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O QuartzSiO2
O HedenbergiteCaFe2+Si2O6
O ZirconZr(SiO4)
O DiopsideCaMgSi2O6
O TitaniteCaTi(SiO4)O
O Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
O MalachiteCu2(CO3)(OH)2
O MagnetiteFe2+Fe23+O4
O ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
O Goethiteα-Fe3+O(OH)
O Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
F NorbergiteMg3(SiO4)(F,OH)2
F Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Mg NorbergiteMg3(SiO4)(F,OH)2
Mg DiopsideCaMgSi2O6
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Al ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Al Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Si NorbergiteMg3(SiO4)(F,OH)2
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si QuartzSiO2
Si HedenbergiteCaFe2+Si2O6
Si ZirconZr(SiO4)
Si DiopsideCaMgSi2O6
Si TitaniteCaTi(SiO4)O
Si Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Si ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Si Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
S MolybdeniteMoS2
S PyriteFeS2
Cl Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Ca CalciteCaCO3
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca HedenbergiteCaFe2+Si2O6
Ca DiopsideCaMgSi2O6
Ca TitaniteCaTi(SiO4)O
Ca Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Ti TitaniteCaTi(SiO4)O
Ti Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe HedenbergiteCaFe2+Si2O6
Fe PyriteFeS2
Fe MagnetiteFe2+Fe23+O4
Fe Goethiteα-Fe3+O(OH)
Fe Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Cu MalachiteCu2(CO3)(OH)2
Cu ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Zr ZirconZr(SiO4)
Mo MolybdeniteMoS2
Ce Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)

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

1000 - 1600 Ma

ID: 2874272
Quartz-Oligoclase Gneiss

Age: Mesoproterozoic (1000 - 1600 Ma)

Stratigraphic Name: Losee Metamorphic Suite

Description: White-weathering, light-greenish-gray, medium- to coarse-grained, moderately layered to indistinctly foliated gneiss and lesser amounts of granofels composed of quartz, oligoclase or andesine, and, locally, biotite, hornblende and (or) clinopyroxene. Contains thin amphibolite layers.

Comments: Losee Metamorphic Suite (Middle Proterozoic) (Drake, 1984) Original map source: Dalton, R.F., Herman, G.C., Monteverde, D.H., Pristas, R.S., Sugarman, P.J., and Volkert, R.A., 1999, New Jersey Department of Environmental Protection, Bedrock Geology and Topographic Base Maps of New Jersey: New Jersey Geological Survey CD Series CD 00

Lithology: Major:{gneiss}, Minor:{granofels,amphibolite}

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]

1000 - 1600 Ma

ID: 3188605
Mesoproterozoic crystalline metamorphic rocks

Age: Mesoproterozoic (1000 - 1600 Ma)

Lithology: Paragneiss; paragneiss

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, used under Creative Commons Attribution 4.0 License


Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Dunn, Pete J. (1995), Franklin and Sterling Hill New Jersey: the world's most magnificent mineral deposits, Part 2: 169.
Lentz, D. R. (1998), Late tectonic U-Th-Mo-REE skarn and carbonatite vein-dyke systems in the south-western Grenville Province: A pegmatite-related pneumatolytic model linked to marble melting. In Mineral intrusion related skarn systems, ed. D. R. Lentz, vol. 26, 519-657. Mineralogical Association of Canada short course.
Volkert, R. A., and Drake, A. A. (1999), Geochemistry and stratigraphic relations of Middle Protorozoic rocks of the New Jersey Highlands, USGS Professional Paper 1565-C: 77.
Volkert, R. A., Zartman, R. E., and Moore, P. B. (2005), U-Pb zircon geochronology of Mesoproterozoic postorogenic rocks and implications for post-Ottawan magmatism and metallogensis, New Jersey Highlands and contiguous areas, USA. Precambrian Research: 139: 1–19.

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