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Joppa Hill, Amherst, Hillsborough Co., New Hampshire, USAi
Regional Level Types
Joppa HillHill
Amherst- not defined -
Hillsborough Co.County
New HampshireState
USACountry

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Key
Latitude & Longitude (WGS84):
42° 56' 2'' North , 71° 34' 55'' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
PlacePopulationDistance
Bedford21,188 (2017)5.6km
Mont Vernon2,166 (2017)8.7km
Amherst613 (2017)8.8km
Pinardville4,780 (2017)9.0km
Goffstown3,196 (2017)9.7km


The Joppa Hill prospects are in Amherst, close to the Amherst-Bedford line. A vesuvianite crystal from this locality was illustrated in the 2nd edition of Dana's System of Mineralogy (1844). Mineralization occurs in bedrock exposures of contact metamorphosed limestone and in a quartz vein, both in Amherst. Boulders extending across the town line into Bedford also produce specimens. This mineral list includes occurrences in both towns.

The locality was first discovered by a Dr. Matthias Spalding of Amherst who noticed some unusual rocks in stone walls of the area. The source of these stones was discovered in a ravine on the land of Betsey Stevens. Dr. Spalding (and a Mr. Peabody) guided geologist Charles Jackson to the locality. Jackson described the rock as being exactly like the "limestone" of Phippsburg, Maine (Jackson, 1844).

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


23 valid minerals.

Detailed Mineral List:

Albite
Formula: Na(AlSi3O8)
Description: EDS analysis by Kerry Day (2008) showed this plagioclase mineral to be near end member albite.
Reference: P Cristofono collection
Allanite-(Ce) ?
Formula: {CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Reference: T Mortimer collection
Calcite
Formula: CaCO3
Chalcopyrite
Formula: CuFeS2
Description: Associated with galena and sphalerite in a quartz vein.
Reference: P Cristofono collection
Chamosite
Formula: (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Colour: dark green
Description: EDS analysis by Kerry Day, 2008.
Reference: P Cristofono collection
Clinozoisite
Formula: {Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Habit: prismatic
Colour: pale green, gray, colorless
Reference: P. Cristofono collection; T. Mortimer collection; D. Swenson collection
Clinozoisite var: Clinothulite
Formula: {Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Colour: pink
Description: Qualitative SEM-EDS by Kerry Day: Al (1.49 KeV) = 1221; Si (1.74) = 1459; Ca (3.69) = 1016; Mn (5.90) = 33; Fe (6.40) = 51; Background values 2/10 = 85/9 "Zoisite/Clinozoisite/Thulite. The smallest amount of Mn can colour an Epidote Group mineral cherry red." Clinozoisite is very common at Joppa Hill, usually pale green, sometimes colorless, very rarely pink. Zoisite does not occur at the locality. "Thulite" = Mn-bearing zoisite. "Clinothulite" = Mn-bearing clinozoisite.
Reference: P Cristofono collection, 2008
Covellite
Formula: CuS
Reference: P Cristofono collection
Diopside
Formula: CaMgSi2O6
Habit: good crystals in calcite
Colour: green
Fluorescence: none
Reference: P Cristofono collection
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Colour: dark green, black
Description: Three EDS analyses of Joppa Hill epidote showed enrichment in Ce, La and Nd but not enough for allanite. Ref: Tom Mortimer, www.mindatnh.org.
Reference: Tom Mortimer, www.mindatnh.org/Epidote%20Gallery1.html
Ferro-hornblende ?
Formula: ☐{Ca2}{Fe2+4Al}(AlSi7O22)(OH)2
Habit: Dark green bladed crystals which sometimes look like "actinolite."
Colour: dark green
Fluorescence: none
Description: Further analysis (T. Mortimer, mindatnh.org, 2010) indicates that at least some of the the "ferrohornblende" from this locality is actually pargasite.
Reference: Tom Mortimer, pers. comm. 2005
Fluorapatite
Formula: Ca5(PO4)3F
Colour: blue-green, green
Fluorescence: white, SW
Reference: P. Cristofono collection
Galena
Formula: PbS
Habit: no crystals seen
Colour: metallic gray
Fluorescence: none
Description: Occurs with sphalerite in quartz vein.
Reference: P Cristofono collection
Goethite
Formula: α-Fe3+O(OH)
Reference: P Cristofono collection
Grossular
Formula: Ca3Al2(SiO4)3
Habit: good crystals
Colour: cinnamon-brown, tan, red
Description: Note: Lighter colored garnets from Joppa Hill have long been called grossular. A darker red garnet was analyzed by SEM-EDS and found to be grossular as well. Ca>Fe>Mn. (P. Cristofono specimen, analysis done by Kerry Day, 2008.)
Reference: P. Cristofono collection; Rocks & Minerals (2005) 80:242-261 New Hampshire Mineral Locality Index
Grossular var: Hessonite
Formula: Ca3Al2(SiO4)3
Habit: good crystals occur in quartz and calcite
Colour: cinnamon brown, yellow-brown
Reference: P Cristofono collection
Hematite
Formula: Fe2O3
Habit: massive
Colour: red
Description: Occurs in quartz vein.
Reference: P Cristofono collection
'K Feldspar'
Colour: white
Description: 1 mm subhedral white crystals in massive grossular were found by EDS analysis (Kerry Day, 2008) to be microcline or orthoclase.
Reference: P Cristofono collection
Malachite
Formula: Cu2(CO3)(OH)2
Habit: no crystals observed
Colour: green
Description: Rare, associated with chalcopyrite in quartz vein
Reference: P Cristofono collection
'Manganese Oxides'
Reference: P. Cristofono collection
'Manganese Oxides var: Manganese Dendrites'
Reference: P. Cristofono collection
Pargasite
Formula: {Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
Description: An EDS plot of an amphibole sample from this locality was interpreted by Marian Lupulescu of the NY State Museum to be pargasite. (Tom Mortimer, pers. comm. 2010).
Reference: Rocks & Minerals (2005) 80:242-261 New Hampshire Mineral Locality Index.
Pyrite
Formula: FeS2
Habit: cubic crystals, commonly altered
Colour: brassy
Fluorescence: none
Reference: P Cristofono collections
Quartz
Formula: SiO2
Quartz var: Chalcedony
Formula: SiO2
Habit: botryoidal
Colour: blue, purple
Description: Occurs in quartz veins.
Reference: T. Mortimer, Nashua Min. Soc. Display Cat., 1995
Quartz var: Milky Quartz
Formula: SiO2
Reference: P. Cristofono collection
'Scapolite' ?
Habit: good crystals rare
Colour: white
Description: Crystals that look like scapolite are common in Bedford boulders. However, all crystals analyzed to date appear to be pseudomorphs after scapolite.
Reference: P Cristofono collection.
Scheelite
Formula: Ca(WO4)
Habit: massive
Colour: white
Fluorescence: bright blue-white (SW)
Reference: P Cristofono collection
Sphalerite
Formula: ZnS
Habit: usually massive
Colour: gray, pale brown
Description: Occurs with galena in quartz vein
Reference: P Cristofono collection
Sphalerite var: Cleiophane
Formula: ZnS
Colour: pale tints
Description: SEM-EDS analysis, 2009. Iron-free sphalerite, ZnS.
Reference: P Cristofono collection
Titanite
Formula: CaTi(SiO4)O
Colour: yellow, brown
Vesuvianite
Formula: Ca19Fe3+Al4(Al6Mg2)(☐4)☐[Si2O7]4[(SiO4)10]O(OH)9
Colour: brown
Reference: Dana 2; Rocks & Minerals (2005) 80:242-261 New Hampshire Mineral Locality Index

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Chalcopyrite2.CB.10aCuFeS2
Covellite2.CA.05aCuS
Galena2.CD.10PbS
Pyrite2.EB.05aFeS2
Sphalerite2.CB.05aZnS
var: Cleiophane2.CB.05aZnS
Group 4 - Oxides and Hydroxides
Goethite4.00.α-Fe3+O(OH)
Hematite4.CB.05Fe2O3
Quartz4.DA.05SiO2
var: Chalcedony4.DA.05SiO2
var: Milky Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Malachite5.BA.10Cu2(CO3)(OH)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Scheelite7.GA.05Ca(WO4)
Group 8 - Phosphates, Arsenates and Vanadates
Fluorapatite8.BN.05Ca5(PO4)3F
Group 9 - Silicates
Albite9.FA.35Na(AlSi3O8)
Allanite-(Ce) ?9.BG.05b{CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Chamosite9.EC.55(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Clinozoisite9.BG.05a{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
var: Clinothulite9.BG.05a{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Diopside9.DA.15CaMgSi2O6
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ferro-hornblende ?9.DE.10☐{Ca2}{Fe2+4Al}(AlSi7O22)(OH)2
Grossular9.AD.25Ca3Al2(SiO4)3
var: Hessonite9.AD.25Ca3Al2(SiO4)3
Pargasite9.DE.15{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
Titanite9.AG.15CaTi(SiO4)O
Vesuvianite9.BG.35Ca19Fe3+Al4(Al6Mg2)(☐4)☐[Si2O7]4[(SiO4)10]O(OH)9
Unclassified Minerals, Rocks, etc.
'K Feldspar'-
'Manganese Oxides'-
'var: Manganese Dendrites'-
'Scapolite' ?-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Covellite2.8.12.1CuS
Galena2.8.1.1PbS
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Malachite16a.3.1.1Cu2(CO3)(OH)2
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Fluorapatite41.8.1.1Ca5(PO4)3F
Group 48 - ANHYDROUS MOLYBDATES AND TUNGSTATES
AXO4
Scheelite48.1.2.1Ca(WO4)
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Grossular51.4.3b.2Ca3Al2(SiO4)3
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)
Clinozoisite58.2.1a.4{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Epidote58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Vesuvianite58.2.4.1Ca19Fe3+Al4(Al6Mg2)(☐4)☐[Si2O7]4[(SiO4)10]O(OH)9
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Diopside65.1.3a.1CaMgSi2O6
Group 66 - INOSILICATES Double-Width,Unbranched Chains,(W=2)
Amphiboles - Mg-Fe-Mn-Li subgroup
Pargasite66.1.3a.12{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings interlayered 1:1, 2:1, and octahedra
Chamosite71.4.1.7(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)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)
Unclassified Minerals, Mixtures, etc.
Clinozoisite
var: Clinothulite
-{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Ferro-hornblende ?-☐{Ca2}{Fe2+4Al}(AlSi7O22)(OH)2
Grossular
var: Hessonite
-Ca3Al2(SiO4)3
'K Feldspar'-
'Manganese Oxides'-
'var: Manganese Dendrites'-
Quartz
var: Chalcedony
-SiO2
var: Milky Quartz-SiO2
'Scapolite' ?-
Sphalerite
var: Cleiophane
-ZnS

List of minerals for each chemical element

HHydrogen
H VesuvianiteCa19Fe3+Al4(Al6Mg2)(☐4)☐[Si2O7]4[(SiO4)10]O(OH)9
H Pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
H Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
H Clinozoisite (var: Clinothulite){Ca2}{Al3}(Si2O7)(SiO4)O(OH)
H Goethiteα-Fe3+O(OH)
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H MalachiteCu2(CO3)(OH)2
H Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
H Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
H Ferro-hornblende☐{Ca2}{Fe42+Al}(AlSi7O22)(OH)2
CCarbon
C CalciteCaCO3
C MalachiteCu2(CO3)(OH)2
OOxygen
O GrossularCa3Al2(SiO4)3
O VesuvianiteCa19Fe3+Al4(Al6Mg2)(☐4)☐[Si2O7]4[(SiO4)10]O(OH)9
O Pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
O DiopsideCaMgSi2O6
O Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
O QuartzSiO2
O Grossular (var: Hessonite)Ca3Al2(SiO4)3
O AlbiteNa(AlSi3O8)
O Quartz (var: Milky Quartz)SiO2
O FluorapatiteCa5(PO4)3F
O Quartz (var: Chalcedony)SiO2
O TitaniteCaTi(SiO4)O
O Clinozoisite (var: Clinothulite){Ca2}{Al3}(Si2O7)(SiO4)O(OH)
O Goethiteα-Fe3+O(OH)
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O CalciteCaCO3
O ScheeliteCa(WO4)
O MalachiteCu2(CO3)(OH)2
O Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
O HematiteFe2O3
O Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
O Ferro-hornblende☐{Ca2}{Fe42+Al}(AlSi7O22)(OH)2
FFluorine
F FluorapatiteCa5(PO4)3F
NaSodium
Na Pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
Na AlbiteNa(AlSi3O8)
MgMagnesium
Mg VesuvianiteCa19Fe3+Al4(Al6Mg2)(☐4)☐[Si2O7]4[(SiO4)10]O(OH)9
Mg Pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
Mg DiopsideCaMgSi2O6
Mg Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
AlAluminium
Al GrossularCa3Al2(SiO4)3
Al VesuvianiteCa19Fe3+Al4(Al6Mg2)(☐4)☐[Si2O7]4[(SiO4)10]O(OH)9
Al Pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
Al Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Al Grossular (var: Hessonite)Ca3Al2(SiO4)3
Al AlbiteNa(AlSi3O8)
Al Clinozoisite (var: Clinothulite){Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Al Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Al Ferro-hornblende☐{Ca2}{Fe42+Al}(AlSi7O22)(OH)2
SiSilicon
Si GrossularCa3Al2(SiO4)3
Si VesuvianiteCa19Fe3+Al4(Al6Mg2)(☐4)☐[Si2O7]4[(SiO4)10]O(OH)9
Si Pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
Si DiopsideCaMgSi2O6
Si Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Si QuartzSiO2
Si Grossular (var: Hessonite)Ca3Al2(SiO4)3
Si AlbiteNa(AlSi3O8)
Si Quartz (var: Milky Quartz)SiO2
Si Quartz (var: Chalcedony)SiO2
Si TitaniteCaTi(SiO4)O
Si Clinozoisite (var: Clinothulite){Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Si Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Si Ferro-hornblende☐{Ca2}{Fe42+Al}(AlSi7O22)(OH)2
PPhosphorus
P FluorapatiteCa5(PO4)3F
SSulfur
S Sphalerite (var: Cleiophane)ZnS
S CovelliteCuS
S SphaleriteZnS
S PyriteFeS2
S GalenaPbS
S ChalcopyriteCuFeS2
CaCalcium
Ca GrossularCa3Al2(SiO4)3
Ca VesuvianiteCa19Fe3+Al4(Al6Mg2)(☐4)☐[Si2O7]4[(SiO4)10]O(OH)9
Ca Pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
Ca DiopsideCaMgSi2O6
Ca Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Ca Grossular (var: Hessonite)Ca3Al2(SiO4)3
Ca FluorapatiteCa5(PO4)3F
Ca TitaniteCaTi(SiO4)O
Ca Clinozoisite (var: Clinothulite){Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca CalciteCaCO3
Ca ScheeliteCa(WO4)
Ca Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Ca Ferro-hornblende☐{Ca2}{Fe42+Al}(AlSi7O22)(OH)2
TiTitanium
Ti TitaniteCaTi(SiO4)O
FeIron
Fe VesuvianiteCa19Fe3+Al4(Al6Mg2)(☐4)☐[Si2O7]4[(SiO4)10]O(OH)9
Fe Goethiteα-Fe3+O(OH)
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe PyriteFeS2
Fe ChalcopyriteCuFeS2
Fe Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Fe HematiteFe2O3
Fe Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Fe Ferro-hornblende☐{Ca2}{Fe42+Al}(AlSi7O22)(OH)2
CuCopper
Cu CovelliteCuS
Cu ChalcopyriteCuFeS2
Cu MalachiteCu2(CO3)(OH)2
ZnZinc
Zn Sphalerite (var: Cleiophane)ZnS
Zn SphaleriteZnS
CeCerium
Ce Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
WTungsten
W ScheeliteCa(WO4)
PbLead
Pb GalenaPbS

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Dana, James D. (1844): A System of Mineralogy, 2nd edition.
Jackson, Charles T. (1844): Final Report on The Geology and Mineralogy of New Hampshire.
Phillips, William; Allan, Robert; and Alger, Frances (1844): An Elementary Treatise on Mineralogy, 5th ed. (Boston: William Tickner & Co.): 29.
Silliman, Benjamin (1844): Review of Dana's Mineralogy, American Journal of Science and Arts: 46: 371 (April, 1844)
Hitchcock, Charles H. (1877): Geology of New Hampshire, Vol. II.
Hawes, George W. (1878): Geology of New Hampshire, Vol.III, Part IV.
Elwell, Wilbur J. (1936): A Mineralogical Trip Through New England. Rocks and Minerals: 11(3): 36-7.
Rocks and Minerals (1951), World News on Mineral Occurrences: 26: 148.
Meyers, T. R. & Stewart, G. W. (1956): The Geology of New Hampshire.
Morrill, Philip (1960): New Hampshire Mines & Mineral Localities, 2nd ed.
Babcock, M. (1965): Joppa Hill and Old Granite Quarry, Rocks & Minerals: 40: 26-27.

Other Regions, Features and Areas containg this locality

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