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Joppa Hill, Amherst, Hillsborough County, New Hampshire, USAi
| Regional Level Types | |
|---|---|
| Joppa Hill | Hill |
| Amherst | Town |
| Hillsborough County | County |
| New Hampshire | State |
| USA | Country |
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Latitude & Longitude (WGS84):
42° 56' 2'' North , 71° 34' 55'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Bedford | 21,188 (2017) | 5.6km |
| Mont Vernon | 2,166 (2017) | 8.7km |
| Amherst | 613 (2017) | 8.8km |
| Pinardville | 4,780 (2017) | 9.0km |
| Goffstown | 3,196 (2017) | 9.7km |
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
Local clubs are the best way to get access to collecting localities
| Club | Location | Distance |
|---|---|---|
| Capital Mineral Club | Concord, New Hampshire | 31km |
| Nashoba Valley Mineralogical Society | Westford, Massachusetts | 41km |
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 Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Albite Formula: Na(AlSi3O8) Description: EDS analysis by Kerry Day (2008) showed this plagioclase mineral to be near end member albite. References: |
| ⓘ Allanite-(Ce) ? Formula: (CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH) References: |
| ⓘ Calcite Formula: CaCO3 |
| ⓘ Chalcopyrite Formula: CuFeS2 Description: Associated with galena and sphalerite in a quartz vein. References: |
| ⓘ Chamosite Formula: (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8 Colour: dark green Description: EDS analysis by Kerry Day, 2008. References: |
| ⓘ Clinozoisite Formula: (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) Habit: prismatic Colour: pale green, gray, colorless |
| ⓘ 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. References: |
| ⓘ Covellite Formula: CuS References: |
| ⓘ Diopside Formula: CaMgSi2O6 Habit: good crystals in calcite Colour: green Fluorescence: none References: |
| ⓘ Epidote Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](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. |
| ⓘ Ferro-hornblende ? Formula: ◻Ca2(Fe2+4Al)(Si7Al)O22(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. References: |
| ⓘ Fluorapatite Formula: Ca5(PO4)3F Colour: blue-green, green Fluorescence: white, SW References: |
| ⓘ Galena Formula: PbS Habit: no crystals seen Colour: metallic gray Fluorescence: none Description: Occurs with sphalerite in quartz vein. References: |
| ⓘ Goethite Formula: Fe3+O(OH) References: |
| ✪ 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.) |
| ⓘ Grossular var. Hessonite Formula: Ca3Al2(SiO4)3 Habit: good crystals occur in quartz and calcite Colour: cinnamon brown, yellow-brown References: |
| ⓘ Hematite Formula: Fe2O3 Habit: massive Colour: red Description: Occurs in quartz vein. References: |
| ⓘ '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. References: |
| ⓘ Malachite Formula: Cu2(CO3)(OH)2 Habit: no crystals observed Colour: green Description: Rare, associated with chalcopyrite in quartz vein References: |
| ⓘ 'Manganese Oxides' References: |
| ⓘ 'Manganese Oxides var. Manganese Dendrites' References: |
| ⓘ Pargasite Formula: NaCa2(Mg4Al)(Si6Al2)O22(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). |
| ⓘ Pyrite Formula: FeS2 Habit: cubic crystals, commonly altered Colour: brassy Fluorescence: none References: |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Quartz var. Chalcedony Formula: SiO2 Habit: botryoidal Colour: blue, purple Description: Occurs in quartz veins. References: |
| ⓘ Quartz var. Milky Quartz Formula: SiO2 References: |
| ⓘ '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. References: |
| ⓘ Scheelite Formula: Ca(WO4) Habit: massive Colour: white Fluorescence: bright blue-white (SW) References: |
| ⓘ Sphalerite Formula: ZnS Habit: usually massive Colour: gray, pale brown Description: Occurs with galena in quartz vein References: |
| ⓘ Sphalerite var. Cleiophane Formula: ZnS Colour: pale tints Description: SEM-EDS analysis, 2009. Iron-free sphalerite, ZnS. References: |
| ⓘ Titanite Formula: CaTi(SiO4)O Colour: yellow, brown |
| ✪ Vesuvianite Formula: Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 Colour: brown |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Covellite | 2.CA.05a | CuS |
| ⓘ | Sphalerite | 2.CB.05a | ZnS |
| ⓘ | var. Cleiophane | 2.CB.05a | ZnS |
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Galena | 2.CD.10 | PbS |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Goethite | 4.00. | Fe3+O(OH) |
| ⓘ | Hematite | 4.CB.05 | Fe2O3 |
| ⓘ | Quartz var. Chalcedony | 4.DA.05 | SiO2 |
| ⓘ | 4.DA.05 | SiO2 | |
| ⓘ | var. Milky Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
| ⓘ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| ⓘ | Scheelite | 7.GA.05 | Ca(WO4) |
| Group 8 - Phosphates, Arsenates and Vanadates | |||
| ⓘ | Fluorapatite | 8.BN.05 | Ca5(PO4)3F |
| Group 9 - Silicates | |||
| ⓘ | Grossular | 9.AD.25 | Ca3Al2(SiO4)3 |
| ⓘ | var. Hessonite | 9.AD.25 | Ca3Al2(SiO4)3 |
| ⓘ | Titanite | 9.AG.15 | CaTi(SiO4)O |
| ⓘ | Clinozoisite | 9.BG.05a | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| ⓘ | Epidote | 9.BG.05a | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| ⓘ | Clinozoisite var. Clinothulite | 9.BG.05a | {Ca2}{Al3}(Si2O7)(SiO4)O(OH) |
| ⓘ | Allanite-(Ce) ? | 9.BG.05b | (CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH) |
| ⓘ | Vesuvianite | 9.BG.35 | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
| ⓘ | Diopside | 9.DA.15 | CaMgSi2O6 |
| ⓘ | Ferro-hornblende ? | 9.DE.10 | ◻Ca2(Fe2+4Al)(Si7Al)O22(OH)2 |
| ⓘ | Pargasite | 9.DE.15 | NaCa2(Mg4Al)(Si6Al2)O22(OH)2 |
| ⓘ | Chamosite | 9.EC.55 | (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8 |
| ⓘ | Albite | 9.FA.35 | Na(AlSi3O8) |
| Unclassified | |||
| ⓘ | 'Scapolite' ? | - | |
| ⓘ | 'K Feldspar' | - | |
| ⓘ | 'Manganese Oxides var. Manganese Dendrites' | - | |
| ⓘ | '' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Allanite-(Ce) | (CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH) |
| H | ⓘ Chamosite | (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8 |
| H | ⓘ Clinozoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| H | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| H | ⓘ Ferro-hornblende | ◻Ca2(Fe42+Al)(Si7Al)O22(OH)2 |
| H | ⓘ Goethite | Fe3+O(OH) |
| H | ⓘ Malachite | Cu2(CO3)(OH)2 |
| H | ⓘ Pargasite | NaCa2(Mg4Al)(Si6Al2)O22(OH)2 |
| H | ⓘ Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
| H | ⓘ Clinozoisite var. Clinothulite | {Ca2}{Al3}(Si2O7)(SiO4)O(OH) |
| C | Carbon | |
| C | ⓘ Calcite | CaCO3 |
| C | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | Oxygen | |
| O | ⓘ Albite | Na(AlSi3O8) |
| O | ⓘ Allanite-(Ce) | (CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH) |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Quartz var. Chalcedony | SiO2 |
| O | ⓘ Chamosite | (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8 |
| O | ⓘ Clinozoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| O | ⓘ Diopside | CaMgSi2O6 |
| O | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| O | ⓘ Ferro-hornblende | ◻Ca2(Fe42+Al)(Si7Al)O22(OH)2 |
| O | ⓘ Fluorapatite | Ca5(PO4)3F |
| O | ⓘ Goethite | Fe3+O(OH) |
| O | ⓘ Grossular | Ca3Al2(SiO4)3 |
| O | ⓘ Hematite | Fe2O3 |
| O | ⓘ Grossular var. Hessonite | Ca3Al2(SiO4)3 |
| O | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | ⓘ Pargasite | NaCa2(Mg4Al)(Si6Al2)O22(OH)2 |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Scheelite | Ca(WO4) |
| O | ⓘ Titanite | CaTi(SiO4)O |
| O | ⓘ Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
| O | ⓘ Quartz var. Milky Quartz | SiO2 |
| O | ⓘ Clinozoisite var. Clinothulite | {Ca2}{Al3}(Si2O7)(SiO4)O(OH) |
| F | Fluorine | |
| F | ⓘ Fluorapatite | Ca5(PO4)3F |
| Na | Sodium | |
| Na | ⓘ Albite | Na(AlSi3O8) |
| Na | ⓘ Pargasite | NaCa2(Mg4Al)(Si6Al2)O22(OH)2 |
| Mg | Magnesium | |
| Mg | ⓘ Chamosite | (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8 |
| Mg | ⓘ Diopside | CaMgSi2O6 |
| Mg | ⓘ Pargasite | NaCa2(Mg4Al)(Si6Al2)O22(OH)2 |
| Mg | ⓘ Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
| Al | Aluminium | |
| Al | ⓘ Albite | Na(AlSi3O8) |
| Al | ⓘ Allanite-(Ce) | (CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH) |
| Al | ⓘ Chamosite | (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8 |
| Al | ⓘ Clinozoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| Al | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Al | ⓘ Ferro-hornblende | ◻Ca2(Fe42+Al)(Si7Al)O22(OH)2 |
| Al | ⓘ Grossular | Ca3Al2(SiO4)3 |
| Al | ⓘ Grossular var. Hessonite | Ca3Al2(SiO4)3 |
| Al | ⓘ Pargasite | NaCa2(Mg4Al)(Si6Al2)O22(OH)2 |
| Al | ⓘ Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
| Al | ⓘ Clinozoisite var. Clinothulite | {Ca2}{Al3}(Si2O7)(SiO4)O(OH) |
| Si | Silicon | |
| Si | ⓘ Albite | Na(AlSi3O8) |
| Si | ⓘ Allanite-(Ce) | (CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH) |
| Si | ⓘ Quartz var. Chalcedony | SiO2 |
| Si | ⓘ Chamosite | (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8 |
| Si | ⓘ Clinozoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| Si | ⓘ Diopside | CaMgSi2O6 |
| Si | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Si | ⓘ Ferro-hornblende | ◻Ca2(Fe42+Al)(Si7Al)O22(OH)2 |
| Si | ⓘ Grossular | Ca3Al2(SiO4)3 |
| Si | ⓘ Grossular var. Hessonite | Ca3Al2(SiO4)3 |
| Si | ⓘ Pargasite | NaCa2(Mg4Al)(Si6Al2)O22(OH)2 |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Titanite | CaTi(SiO4)O |
| Si | ⓘ Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
| Si | ⓘ Quartz var. Milky Quartz | SiO2 |
| Si | ⓘ Clinozoisite var. Clinothulite | {Ca2}{Al3}(Si2O7)(SiO4)O(OH) |
| P | Phosphorus | |
| P | ⓘ Fluorapatite | Ca5(PO4)3F |
| S | Sulfur | |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Covellite | CuS |
| S | ⓘ Galena | PbS |
| S | ⓘ Pyrite | FeS2 |
| S | ⓘ Sphalerite | ZnS |
| S | ⓘ Sphalerite var. Cleiophane | ZnS |
| Ca | Calcium | |
| Ca | ⓘ Allanite-(Ce) | (CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH) |
| Ca | ⓘ Calcite | CaCO3 |
| Ca | ⓘ Clinozoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| Ca | ⓘ Diopside | CaMgSi2O6 |
| Ca | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Ca | ⓘ Ferro-hornblende | ◻Ca2(Fe42+Al)(Si7Al)O22(OH)2 |
| Ca | ⓘ Fluorapatite | Ca5(PO4)3F |
| Ca | ⓘ Grossular | Ca3Al2(SiO4)3 |
| Ca | ⓘ Grossular var. Hessonite | Ca3Al2(SiO4)3 |
| Ca | ⓘ Pargasite | NaCa2(Mg4Al)(Si6Al2)O22(OH)2 |
| Ca | ⓘ Scheelite | Ca(WO4) |
| Ca | ⓘ Titanite | CaTi(SiO4)O |
| Ca | ⓘ Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
| Ca | ⓘ Clinozoisite var. Clinothulite | {Ca2}{Al3}(Si2O7)(SiO4)O(OH) |
| Ti | Titanium | |
| Ti | ⓘ Titanite | CaTi(SiO4)O |
| Fe | Iron | |
| Fe | ⓘ Allanite-(Ce) | (CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH) |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Chamosite | (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8 |
| Fe | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Fe | ⓘ Ferro-hornblende | ◻Ca2(Fe42+Al)(Si7Al)O22(OH)2 |
| Fe | ⓘ Goethite | Fe3+O(OH) |
| Fe | ⓘ Hematite | Fe2O3 |
| Fe | ⓘ Pyrite | FeS2 |
| Fe | ⓘ Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Cu | ⓘ Covellite | CuS |
| Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
| Zn | Zinc | |
| Zn | ⓘ Sphalerite | ZnS |
| Zn | ⓘ Sphalerite var. Cleiophane | ZnS |
| Ce | Cerium | |
| Ce | ⓘ Allanite-(Ce) | (CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH) |
| W | Tungsten | |
| W | ⓘ Scheelite | Ca(WO4) |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Ganderia DomainDomain
- GranderiaPassive Margin
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References
Phillips, William, Alger, Francis (1844) An Elementary Treatise on Mineralogy (5th ed.) William D. Ticknor & Co., Boston, MA. p.29
Hitchcock, C. H. (1874) The Geology of New Hampshire Vol. 3,4,5 - Part III. Surface Geology. Part IV. Mineralogy and Lithology. Part V. Economic Geology. New Hampshire Geological and Mineralogical Survey, Concord, NH.
Hitchcock, C. H. (1877) The Geology of New Hampshire Vol. 2 - Part II. Stratigraphical Geology. New Hampshire Geological and Mineralogical Survey, Concord, NH.
Elwell, Wilbur J. (1936) A Mineralogical Trip Through New England. Rocks and Minerals, 11 (3). 36-37
Joppa Hill, Amherst, Hillsborough County, New Hampshire, USA