Francestown Soapstone quarry, Francestown, Hillsborough County, New Hampshire, USAi
| Regional Level Types | |
|---|---|
| Francestown Soapstone quarry | Quarry |
| Francestown | - not defined - |
| Hillsborough County | County |
| New Hampshire | State |
| USA | Country |
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Latitude & Longitude (WGS84):
42° 59' 53'' North , 71° 52' 26'' West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~0km
Type:
Köppen climate type:
Soapstone was discovered here by Daniel Fuller in 1794 while plowing his field (Jackson, 1844), and first worked in the early nineteenth century, possibly in one of these years: 1802 (Jackson, 1844); 1804 (Farmer and Moore, 1823; Carter, 1831) or 1808 (Cochrane and Wood, 1895). The deposit is in talc-phlogopite-actinolite schist and talc-phlogopite schist. The Francestown Soapstone Company was incorporated on June 22, 1865. The quarry closed in 1891.
"Dr. Charles T. Jackson, the distinguished geologist, testifying as an expert in a law case said: 'The Francestown stone, for color, beauty, and evenness, surpasses all other soapstone known.'"(Cochrane and Wood, 1895).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
7 valid minerals.
Rock Types Recorded
Note: data is currently VERY limited. Please bear with us while we work towards adding this information!
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
| ⓘ Actinolite Formula: ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| ⓘ Arsenopyrite Formula: FeAsS |
| ⓘ 'Chlorite Group' |
| ⓘ Phlogopite Formula: KMg3(AlSi3O10)(OH)2 |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Pyrrhotite Formula: Fe1-xS |
| ⓘ Quartz Formula: SiO2 |
| ⓘ 'Soapstone' |
| ⓘ Talc Formula: Mg3Si4O10(OH)2 |
| ⓘ Talc var. Steatite Formula: Mg3(Si4O10)(OH)2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Pyrrhotite | 2.CC.10 | Fe1-xS |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| ⓘ | Arsenopyrite | 2.EB.20 | FeAsS |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 9 - Silicates | |||
| ⓘ | Actinolite | 9.DE.10 | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| ⓘ | Talc var. Steatite | 9.EC.05 | Mg3(Si4O10)(OH)2 |
| ⓘ | 9.EC.05 | Mg3Si4O10(OH)2 | |
| ⓘ | Phlogopite | 9.EC.20 | KMg3(AlSi3O10)(OH)2 |
| Unclassified | |||
| ⓘ | 'Chlorite Group' | - | |
| ⓘ | 'Soapstone' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Actinolite | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| H | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| H | ⓘ Talc var. Steatite | Mg3(Si4O10)(OH)2 |
| H | ⓘ Talc | Mg3Si4O10(OH)2 |
| O | Oxygen | |
| O | ⓘ Actinolite | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| O | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Talc var. Steatite | Mg3(Si4O10)(OH)2 |
| O | ⓘ Talc | Mg3Si4O10(OH)2 |
| Mg | Magnesium | |
| Mg | ⓘ Actinolite | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| Mg | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| Mg | ⓘ Talc var. Steatite | Mg3(Si4O10)(OH)2 |
| Mg | ⓘ Talc | Mg3Si4O10(OH)2 |
| Al | Aluminium | |
| Al | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| Si | Silicon | |
| Si | ⓘ Actinolite | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| Si | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Talc var. Steatite | Mg3(Si4O10)(OH)2 |
| Si | ⓘ Talc | Mg3Si4O10(OH)2 |
| S | Sulfur | |
| S | ⓘ Arsenopyrite | FeAsS |
| S | ⓘ Pyrite | FeS2 |
| S | ⓘ Pyrrhotite | Fe1-xS |
| K | Potassium | |
| K | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| Ca | Calcium | |
| Ca | ⓘ Actinolite | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| Fe | Iron | |
| Fe | ⓘ Actinolite | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| Fe | ⓘ Arsenopyrite | FeAsS |
| Fe | ⓘ Pyrite | FeS2 |
| Fe | ⓘ Pyrrhotite | Fe1-xS |
| As | Arsenic | |
| As | ⓘ Arsenopyrite | FeAsS |
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Ganderia DomainDomain
- GranderiaPassive Margin
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Francestown Soapstone quarry, Francestown, Hillsborough County, New Hampshire, USA