Calapooya River, Dollar, Linn County, Oregon, USAi
| Regional Level Types | |
|---|---|
| Calapooya River | River |
| Dollar | Unincorporated Area |
| Linn County | County |
| Oregon | State |
| USA | Country |
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Latitude & Longitude (WGS84):
44° 15' 51'' North , 122° 33' 22'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Zeolites are found in the altered lower basalt flows of Eocene age along the Calapooya River, near Dollar, Linn County, Oregon. Extensive Miocene basalt flows cover the lower Eocene flows but are devoid of zeolites. Two main sites were found in the early 1960's by Dan Lorimor who worked for Weyerhaeuser and Boyd Care who ran a rock shop in Sweethome, Oregon. Together they found the best specimens in the Calapooya.
One remarkable "pocket" was found in highly decomposed red basalt along a logging road on the north side of the Calapooya River Valley near Washout Creek. While driving along the altered red basalt they noticed a circular 2 meter gray mud area with white "bones" sticking out of it. They stuck in their pick and rolled out specimens of white stilbite that had not been destroyed when the pocket decomposed. They filled up their truck with fine specimens with no matrix that only needed extensive cleaning.
The second remarkable pocket or pockets were found across the valley in the same flow that produce the stilbite "bones", near McKinley Creek. Along the logging road was an exposed vertical pocket 60 cm wide, 2 meters high and 4 meters deep lined with pointed stilbite crystals, up to 5 cm long. After the pocket had been cleaned out, the back wall sounded hollow, removal of the back wall rock exposed a clean white cavity the same size as the first, lined with snow white mordenite-quartz, stalactites of delicate mordenite, up to 60 cm long, with white double terminated stilbite and long chains of stilbite on the walls of mordenite-quartz. A few mordenite stalactites were saved but most were destroyed when handled. These pockets produced truck loads of specimens.
Smaller pockets were found in the altered basalt near the Calapooya River that produced chabazite, mesolite, heulandite, and stilbite.
Gates block the logging roads to these sites. Collecting is not allowed.
Rudy Tschernich
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Calcite Formula: CaCO3 References: |
| ⓘ 'Chabazite' References: |
| ⓘ Hematite Formula: Fe2O3 |
| ⓘ 'Heulandite Subgroup' Formula: (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O References: |
| ⓘ Mesolite Formula: Na2Ca2Si9Al6O30 · 8H2O References: |
| ⓘ Mordenite Formula: (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O References: |
| ⓘ Quartz Formula: SiO2 References: |
| ⓘ 'Stilbite Subgroup' Formula: M6-7[Al8-9Si27-28O72] · nH2O References: |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Hematite | 4.CB.05 | Fe2O3 |
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
| Group 9 - Silicates | |||
| ⓘ | Mesolite | 9.GA.05 | Na2Ca2Si9Al6O30 · 8H2O |
| ⓘ | Mordenite | 9.GD.35 | (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O |
| Unclassified | |||
| ⓘ | 'Chabazite' | - | |
| ⓘ | 'Heulandite Subgroup' | - | (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O |
| ⓘ | 'Stilbite Subgroup' | - | M6-7[Al8-9Si27-28O72] · nH2O |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Heulandite Subgroup | (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O |
| H | ⓘ Mesolite | Na2Ca2Si9Al6O30 · 8H2O |
| H | ⓘ Mordenite | (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O |
| H | ⓘ Stilbite Subgroup | M6-7[Al8-9Si27-28O72] · nH2O |
| C | Carbon | |
| C | ⓘ Calcite | CaCO3 |
| O | Oxygen | |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Hematite | Fe2O3 |
| O | ⓘ Heulandite Subgroup | (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O |
| O | ⓘ Mesolite | Na2Ca2Si9Al6O30 · 8H2O |
| O | ⓘ Mordenite | (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Stilbite Subgroup | M6-7[Al8-9Si27-28O72] · nH2O |
| Na | Sodium | |
| Na | ⓘ Heulandite Subgroup | (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O |
| Na | ⓘ Mesolite | Na2Ca2Si9Al6O30 · 8H2O |
| Na | ⓘ Mordenite | (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O |
| Al | Aluminium | |
| Al | ⓘ Heulandite Subgroup | (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O |
| Al | ⓘ Mesolite | Na2Ca2Si9Al6O30 · 8H2O |
| Al | ⓘ Mordenite | (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O |
| Al | ⓘ Stilbite Subgroup | M6-7[Al8-9Si27-28O72] · nH2O |
| Si | Silicon | |
| Si | ⓘ Heulandite Subgroup | (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O |
| Si | ⓘ Mesolite | Na2Ca2Si9Al6O30 · 8H2O |
| Si | ⓘ Mordenite | (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Stilbite Subgroup | M6-7[Al8-9Si27-28O72] · nH2O |
| K | Potassium | |
| K | ⓘ Heulandite Subgroup | (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O |
| K | ⓘ Mordenite | (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O |
| Ca | Calcium | |
| Ca | ⓘ Calcite | CaCO3 |
| Ca | ⓘ Heulandite Subgroup | (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O |
| Ca | ⓘ Mesolite | Na2Ca2Si9Al6O30 · 8H2O |
| Ca | ⓘ Mordenite | (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O |
| Fe | Iron | |
| Fe | ⓘ Hematite | Fe2O3 |
Other Regions, Features and Areas containing this locality
North AmericaContinent
- Cascade RangeMountain Range
North America PlateTectonic Plate
- Cascade ArcVolcanic Arc
- Siletzia DomainDomain
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Calapooya River, Dollar, Linn County, Oregon, USA