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Coulee City Marina, Coulee City, Grant County, Washington, USAi
| Regional Level Types | |
|---|---|
| Coulee City Marina | - not defined - |
| Coulee City | City |
| Grant County | County |
| Washington | State |
| USA | Country |
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Latitude & Longitude (WGS84):
47° 37' 3'' North , 119° 17' 45'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Coulee City | 572 (2017) | 0.7km |
| Banks Lake South | 174 (2011) | 2.2km |
| Hartline | 156 (2017) | 16.2km |
| Wilson Creek | 211 (2017) | 25.3km |
| Almira | 269 (2017) | 28.5km |
Basalt spoils dredged from Coulee City Marina and piled as dikes and spoils. Located along State Route 2 in the Coulee City Limits.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Aragonite Formula: CaCO3 |
| ⓘ Calcite Formula: CaCO3 Habit: acicular (globular) Colour: Yellowish white Fluorescence: None attempted Description: Lustre - waxy, pearly
Color - yellowish (translucent)
Streak - white
Hardness - ~3
Cleavage - none attempted
Fracture - none attempted but along existing break lines appears brittle and sub-conchoidal (see photo)
Solubility - effervesces readily even with common household vinegar (did not test further for total solubility)
Combination of tests and physical habit show this to be calcite. There is a dirth of zeolite material from the Columbia Flood Basalts which further leads one to a determination of calcite.
This specimen was well discussed on a Mindat ID thread. It was thought that it was 'most likely' Stilbite on prehnite with sphalerite. Chemical testing showed the outer material to dissolve slowly, releasing some effervescence, in hot HCl, but showed no effervescing reaction in cold HCl. No silica gel was noted after completely dissolving. The inner crystal reacted instantly to cold HCl bubbling vigorously and was much too soft to be prehnite. That, coupled with the dirth of zeolites within the Columbia Flood Basalts, shows that this is most likely siderite, which I believe to be a good ID, while the inner globular crystal is most likely calcite. References: |
| ⓘ 'Clay minerals' References: |
| ⓘ Goethite Formula: Fe3+O(OH) |
| ⓘ Formula: SiO2 · nH2O References: |
| ⓘ Formula: SiO2 · nH2O References: |
| ✪ Siderite Formula: FeCO3 Habit: acicular (globular) platy looking with individual crystals curved (see photo) Colour: Yellowish orange Fluorescence: Not tested Description: Lustre - sub-vitreous, silky likely weathered surfaces
Color - Yellowish orange
Streak - white
Hardness - > 3 - < 4 presumed about 3.5
Cleavage - not tested (previous breaks appear to have good cleavage but since this is a crystal mass tests on individual crystals was not attempted)
Brittle, breaks fairly easily and appears to have an irregular break on individual crystals
Solubility - No reaction in cold HCl. Effervesces in hot acid and shows a distinct orange halo around the mineral. Complete dissolution in a few hours with no residue.
This specimen was discussed at length in Mindat ID forum. It was believed to be stilbite but the complete dissolution (lack of silica gel residue) and the orangeish 'halo' around the piece as it dissolved (believed to be iron residue) showed this not to be stilbite. That coupled with the dirth of zeolite materials in the Columbia Flood Basalts show this to be siderite. References: |
| ⓘ Siderite var. Sphärosiderite Formula: FeCO3 |
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Goethite | 4.00. | Fe3+O(OH) |
| ⓘ | Opal var. Opal-AN ? | 4.DA.10 | SiO2 · nH2O |
| ⓘ | ? | 4.DA.10 | SiO2 · nH2O |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
| ⓘ | Siderite | 5.AB.05 | FeCO3 |
| ⓘ | var. Sphärosiderite | 5.AB.05 | FeCO3 |
| ⓘ | Aragonite | 5.AB.15 | CaCO3 |
| Unclassified | |||
| ⓘ | 'Clay minerals' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Goethite | Fe3+O(OH) |
| H | ⓘ Opal var. Opal-AN | SiO2 · nH2O |
| H | ⓘ Opal | SiO2 · nH2O |
| C | Carbon | |
| C | ⓘ Aragonite | CaCO3 |
| C | ⓘ Calcite | CaCO3 |
| C | ⓘ Siderite | FeCO3 |
| C | ⓘ Siderite var. Sphärosiderite | FeCO3 |
| O | Oxygen | |
| O | ⓘ Aragonite | CaCO3 |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Goethite | Fe3+O(OH) |
| O | ⓘ Opal var. Opal-AN | SiO2 · nH2O |
| O | ⓘ Opal | SiO2 · nH2O |
| O | ⓘ Siderite | FeCO3 |
| O | ⓘ Siderite var. Sphärosiderite | FeCO3 |
| Si | Silicon | |
| Si | ⓘ Opal var. Opal-AN | SiO2 · nH2O |
| Si | ⓘ Opal | SiO2 · nH2O |
| Ca | Calcium | |
| Ca | ⓘ Aragonite | CaCO3 |
| Ca | ⓘ Calcite | CaCO3 |
| Fe | Iron | |
| Fe | ⓘ Goethite | Fe3+O(OH) |
| Fe | ⓘ Siderite | FeCO3 |
| Fe | ⓘ Siderite var. Sphärosiderite | FeCO3 |
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- QuesnelliaVolcanic Arc
- Western Quesnellia DomainDomain
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Coulee City Marina, Coulee City, Grant County, Washington, USA