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Mandan Sand/Gravel pit, Mandan, Grant Township, Keweenaw County, Michigan, USAi
| Regional Level Types | |
|---|---|
| Mandan Sand/Gravel pit | Pit (Active) |
| Mandan | Unincorporated Community |
| Grant Township | Township |
| Keweenaw County | County |
| Michigan | State |
| USA | Country |
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Latitude & Longitude (WGS84):
47° 25' 37'' North , 88° 1' 0'' West
Latitude & Longitude (decimal):
Type:
Pit (Active) - last checked 2020
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Copper Harbor | 108 (2017) | 10.7km |
| Ahmeek | 146 (2017) | 32.0km |
| Copper City | 187 (2017) | 32.1km |
| Laurium | 1,941 (2017) | 38.4km |
| Calumet | 703 (2017) | 38.6km |
A sand/gravel pit located just off US41 in Mandan, Michigan. Some datolite, "float copper," and coral fossils can be found here. The best area for datolite collecting is near the rim of the pit alongside conglomerate cobbles. The datolite here comes in many colors, but most have been completely "weathered" to white with most crumbling into a fine powder. Some good datolite can be found "protected" in their rock hosts. The datolite found here is beautiful, but is also quite rare and it can be frustrating having a softball sized datolite crumble in your hands! It is private property and as of August 2020, being actively worked.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
2 valid minerals.
Detailed Mineral List:
| ⓘ Datolite Formula: CaB(SiO4)(OH) |
| ⓘ Natrolite Formula: Na2Al2Si3O10 · 2H2O References: |
List of minerals arranged by Strunz 10th Edition classification
| Group 9 - Silicates | |||
|---|---|---|---|
| ⓘ | Datolite | 9.AJ.20 | CaB(SiO4)(OH) |
| ⓘ | Natrolite | 9.GA.05 | Na2Al2Si3O10 · 2H2O |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Datolite | CaB(SiO4)(OH) |
| H | ⓘ Natrolite | Na2Al2Si3O10 · 2H2O |
| B | Boron | |
| B | ⓘ Datolite | CaB(SiO4)(OH) |
| O | Oxygen | |
| O | ⓘ Datolite | CaB(SiO4)(OH) |
| O | ⓘ Natrolite | Na2Al2Si3O10 · 2H2O |
| Na | Sodium | |
| Na | ⓘ Natrolite | Na2Al2Si3O10 · 2H2O |
| Al | Aluminium | |
| Al | ⓘ Natrolite | Na2Al2Si3O10 · 2H2O |
| Si | Silicon | |
| Si | ⓘ Datolite | CaB(SiO4)(OH) |
| Si | ⓘ Natrolite | Na2Al2Si3O10 · 2H2O |
| Ca | Calcium | |
| Ca | ⓘ Datolite | CaB(SiO4)(OH) |
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Mid-continent DomainDomain
- Mid-continent RiftNarrow Rift
USA
- Michigan
- Keweenaw PeninsulaPeninsula
- Midcontinent RiftGeologic Province
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Mandan Sand/Gravel pit, Mandan, Grant Township, Keweenaw County, Michigan, USA