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Flatrock Quarry (Flat Rock Quarry; Crystal Mall), Waterford, New London Co., Connecticut, USAi
Regional Level Types
Flatrock Quarry (Flat Rock Quarry; Crystal Mall)Quarry (Built Over)
Waterford- not defined -
New London Co.County
ConnecticutState
USACountry

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Key
Latitude & Longitude (WGS84):
41° 22' 31'' North , 72° 8' 35'' West
Latitude & Longitude (decimal):
Locality type:
Quarry (Built Over) - last checked 2019
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Central Waterford2,887 (2017)3.5km
Waterford19,281 (2017)3.8km
New London27,179 (2017)4.2km
Groton9,221 (2018)6.1km
Conning Towers-Nautilus Park8,834 (2017)6.3km


Originally a quarry in the Joshua Rock member of the New London Gneiss - an aegirine-augite granite orthogneiss. In the 1980s Crystal Mall was built at the site and resulted in the recovery of new specimens. The remaining exposure is a long rock cut along state Route 85.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


11 valid minerals. 2 erroneous literature entries.

Detailed Mineral List:

Aegirine
Formula: NaFe3+Si2O6
Description: Reported as aegirine in the reference in 1911, but the mineral found here has since been redefined as aegrine-augite.
Reference: Dale, T. Nelson and Gregory Herbert E. (1911): The Granites of Connecticut (USGS Bulletin 484).
Aegirine-augite
Formula: (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
Habit: anhedral to subhedral elongated prisms
Colour: black to dark green
Description: Reported by Dale and Gregory as aegirine in 1911, the mineral found here has since been redefined as aegirine-augite.
Reference: Dale, T. Nelson and Gregory Herbert E. (1911): The Granites of Connecticut (USGS Bulletin 484).; Macrostrat.org rock unit description.; Wolley, Allan R. (1987), Alkaline Rocks and Carbonatites of the World, Part I, North and South America. London: British Museum of Natural History; University of Texas Press.
'Aeschynite'
Description: now equivalent to Davidite-(La)
Reference: Januzzi, R.E. and Seaman, David M. (1976) Mineral Localities Of Connecticut and Southern New York State and Pegmatite Minerals of the World.
Albite
Formula: Na(AlSi3O8)
Reference: Dale, T. Nelson and Gregory Herbert E. (1911): The Granites of Connecticut (USGS Bulletin 484).
Albite var: Oligoclase
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
Reference: Dale, T. Nelson and Gregory Herbert E. (1911): The Granites of Connecticut (USGS Bulletin 484).
Allanite-(Ce)
Formula: {CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Habit: tabular
Colour: black
Description: unstriated, slightly rounded tabular crystals up to 2 cm
Reference: Robinson, George W. and Vandall T. King. (1988), What's New in Minerals? Mineralogical Record: 19(5): 332.
'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
Reference: Dale, T. Nelson and Gregory Herbert E. (1911): The Granites of Connecticut (USGS Bulletin 484).
Davidite-(La)
Formula: (La,Ce)(Y,U,Fe)(Ti,Fe)20(O,OH)38
Habit: subhedral
Colour: pitch black
Description: Small 1-2 cm obsidian-black subhedral crystals with red staining in adjacent rock.
Reference: Rocks & Min.:64:471.; Rocks & Minerals (1995) 70:396-409
Ilmenite
Formula: Fe2+TiO3
Reference: Foye, 1949. The Geology of Eastern CT
Magnetite
Formula: Fe2+Fe3+2O4
Reference: Dale, T. Nelson and Gregory Herbert E. (1911): The Granites of Connecticut (USGS Bulletin 484).
Microcline
Formula: K(AlSi3O8)
Reference: Dale, T. Nelson and Gregory Herbert E. (1911): The Granites of Connecticut (USGS Bulletin 484).
'Monazite'
Reference: Foye, 1949. The Geology of Eastern CT
Orthoclase
Formula: K(AlSi3O8)
Reference: Dale, T. Nelson and Gregory Herbert E. (1911): The Granites of Connecticut (USGS Bulletin 484).
Quartz
Formula: SiO2
Reference: Dale, T. Nelson and Gregory Herbert E. (1911): The Granites of Connecticut (USGS Bulletin 484).
Titanite
Formula: CaTi(SiO4)O
Reference: Foye, 1949. The Geology of Eastern CT
Zircon
Formula: Zr(SiO4)
Reference: Rocks & Minerals. Vol. 70. No. 6; Rocks & Minerals (1995) 70:396-409

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Davidite-(La)4.CC.40(La,Ce)(Y,U,Fe)(Ti,Fe)20(O,OH)38
Ilmenite4.CB.05Fe2+TiO3
Magnetite4.BB.05Fe2+Fe3+2O4
Quartz4.DA.05SiO2
Group 9 - Silicates
Aegirine ?9.DA.25NaFe3+Si2O6
Aegirine-augite9.DA.20(NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
Albite9.FA.35Na(AlSi3O8)
var: Oligoclase9.FA.35(Na,Ca)[Al(Si,Al)Si2O8]
Allanite-(Ce)9.BG.05b{CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Microcline9.FA.30K(AlSi3O8)
Orthoclase9.FA.30K(AlSi3O8)
Titanite9.AG.15CaTi(SiO4)O
Zircon9.AD.30Zr(SiO4)
Unclassified Minerals, Rocks, etc.
'Aeschynite' ?-
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'Monazite'-

List of minerals arranged by Dana 8th Edition classification

Group 4 - SIMPLE OXIDES
A2X3
Ilmenite4.3.5.1Fe2+TiO3
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 8 - MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
AB21O38
Davidite-(La)8.5.1.5(La,Ce)(Y,U,Fe)(Ti,Fe)20(O,OH)38
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in >[6] coordination
Zircon51.5.2.1Zr(SiO4)
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
Titanite52.4.3.1CaTi(SiO4)O
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
Aegirine ?65.1.3c.2NaFe3+Si2O6
Aegirine-augite65.1.3b.2(NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
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)
Orthoclase76.1.1.1K(AlSi3O8)
Unclassified Minerals, Mixtures, etc.
'Aeschynite' ?-
Albite
var: Oligoclase
-(Na,Ca)[Al(Si,Al)Si2O8]
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'Monazite'-

List of minerals for each chemical element

HHydrogen
H Davidite-(La)(La,Ce)(Y,U,Fe)(Ti,Fe)20(O,OH)38
H ApatiteCa5(PO4)3(Cl/F/OH)
H Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
OOxygen
O Davidite-(La)(La,Ce)(Y,U,Fe)(Ti,Fe)20(O,OH)38
O ZirconZr(SiO4)
O IlmeniteFe2+TiO3
O TitaniteCaTi(SiO4)O
O QuartzSiO2
O OrthoclaseK(AlSi3O8)
O MicroclineK(AlSi3O8)
O Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
O MagnetiteFe2+Fe23+O4
O ApatiteCa5(PO4)3(Cl/F/OH)
O Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
O AlbiteNa(AlSi3O8)
O Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
O AegirineNaFe3+Si2O6
FFluorine
F Davidite-(La)(La,Ce)(Y,U,Fe)(Ti,Fe)20(O,OH)38
F ApatiteCa5(PO4)3(Cl/F/OH)
NaSodium
Na Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
Na AlbiteNa(AlSi3O8)
Na Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Na AegirineNaFe3+Si2O6
MgMagnesium
Mg Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
AlAluminium
Al OrthoclaseK(AlSi3O8)
Al MicroclineK(AlSi3O8)
Al Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
Al Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Al AlbiteNa(AlSi3O8)
Al Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
SiSilicon
Si ZirconZr(SiO4)
Si TitaniteCaTi(SiO4)O
Si QuartzSiO2
Si OrthoclaseK(AlSi3O8)
Si MicroclineK(AlSi3O8)
Si Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
Si Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Si AlbiteNa(AlSi3O8)
Si Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Si AegirineNaFe3+Si2O6
PPhosphorus
P ApatiteCa5(PO4)3(Cl/F/OH)
ClChlorine
Cl ApatiteCa5(PO4)3(Cl/F/OH)
KPotassium
K OrthoclaseK(AlSi3O8)
K MicroclineK(AlSi3O8)
CaCalcium
Ca TitaniteCaTi(SiO4)O
Ca Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
Ca ApatiteCa5(PO4)3(Cl/F/OH)
Ca Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Ca Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
TiTitanium
Ti Davidite-(La)(La,Ce)(Y,U,Fe)(Ti,Fe)20(O,OH)38
Ti IlmeniteFe2+TiO3
Ti TitaniteCaTi(SiO4)O
VVanadium
V Davidite-(La)(La,Ce)(Y,U,Fe)(Ti,Fe)20(O,OH)38
CrChromium
Cr Davidite-(La)(La,Ce)(Y,U,Fe)(Ti,Fe)20(O,OH)38
FeIron
Fe Davidite-(La)(La,Ce)(Y,U,Fe)(Ti,Fe)20(O,OH)38
Fe IlmeniteFe2+TiO3
Fe MagnetiteFe2+Fe23+O4
Fe Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Fe Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Fe AegirineNaFe3+Si2O6
YYttrium
Y Davidite-(La)(La,Ce)(Y,U,Fe)(Ti,Fe)20(O,OH)38
ZrZirconium
Zr ZirconZr(SiO4)
LaLanthanum
La Davidite-(La)(La,Ce)(Y,U,Fe)(Ti,Fe)20(O,OH)38
CeCerium
Ce Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
UUranium
U Davidite-(La)(La,Ce)(Y,U,Fe)(Ti,Fe)20(O,OH)38

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Dale, T. Nelson and Gregory Herbert E. (1911), The Granites of Connecticut. USGS Bulletin 484.
Schairer, John Frank (1931), The Minerals of Connecticut. State Geological and Natural History Survey Bulletin 51.
Wolley, Allan R. (1987), Alkaline Rocks and Carbonatites of the World, Part I, North and South America. London: British Museum of Natural History; University of Texas Press.
Robinson, George W. and Vandall T. King. (1988), What's New in Minerals? Mineralogical Record: 19(5): 332.
Jarnot, Bruce. (1989), Minerals New to the Portland Area Pegmatites of Central Connecticut, Abstract from the 16th Rochester Mineralogical Symposium in Rocks & Minerals: 64(6): 471.
Weber, Marcelle H. and Earle C. Sullivan. (1995), Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue): 70(6): 407.

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