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Tunnel Beach, Oceanside, Tillamook County, Oregon, USAi
| Regional Level Types | |
|---|---|
| Tunnel Beach | Beach |
| Oceanside | Unincorporated Community |
| Tillamook County | County |
| Oregon | State |
| USA | Country |
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All Photos (94)Specimen Photos (88)Locality Photos (6)Photos by ColorGalleryPhoto StatisticsAdd Photo
Latitude & Longitude (WGS84):
45° 27' 49'' North , 123° 58' 23'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Miocene flows and pillow basalt make up to ocean cliffs, seastacks, and arches near Oceanside, Tillamook County, Oregon. Zeolites were first found on the beach at Oceanside by Aaron Weiting in the early 1990s and became well known by others in 1995. The best specimens are found in boulders along the beach and in the cliffs along what is called Tunnel Beach. Maxwell Point extends into the Pacific Ocean at Oceanside and during low tide people walk around it to the beach on the north side of the point. Since many people have become trapped on the north side of Maxwell Point during high tide, a tunnel has be dug through Maxwell Point above the high tide line so people can retreat. The beach on the north side of Maxwell Point has been called Tunnel Beach. Zeolites are found in boulders and in the cliff at the north end of Tunnel Beach. A 4 to 8 pound hammer is required to break the hard fine-grained vesicular basalt.
Select Mineral List Type
StandardDetailedGalleryStrunzChemical ElementsDetailed Mineral List:
| ⓘ'Chabazite' |
| ⓘ'Clinoptilolite Subgroup' Formula:(Na/Ca/K)3-6[Al6-7Si29-30O72] · 20H2O |
| ⓘ'Erionite Subgroup' Formula:M2[Al4Si14O36] · 15H2O References: |
| ⓘGyrolite Formula:NaCa16Si23AlO60(OH)8 · 14H2O |
| ⓘMordenite Formula:(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O |
| ⓘPyrite Formula:FeS2 |
| ⓘQuartz Formula:SiO2 |
| ⓘQuartz var. Chalcedony Formula:SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz var. Chalcedony | 4.DA.05 | SiO2 |
| ⓘ | 4.DA.05 | SiO2 | |
| Group 9 - Silicates | |||
| ⓘ | Gyrolite | 9.EE.30 | NaCa16Si23AlO60(OH)8 · 14H2O |
| ⓘ | Mordenite | 9.GD.35 | (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O |
| Unclassified | |||
| ⓘ | 'Chabazite' | - | |
| ⓘ | 'Clinoptilolite Subgroup' | - | (Na/Ca/K)3-6[Al6-7Si29-30O72] · 20H2O |
| ⓘ | 'Erionite Subgroup' | - | M2[Al4Si14O36] · 15H2O |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘClinoptilolite Subgroup | (Na/Ca/K)3-6[Al6-7Si29-30O72] · 20H2O |
| H | ⓘErionite Subgroup | M2[Al4Si14O36] · 15H2O |
| H | ⓘGyrolite | NaCa16Si23AlO60(OH)8 · 14H2O |
| H | ⓘMordenite | (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O |
| O | Oxygen | |
| O | ⓘQuartz var.Chalcedony | SiO2 |
| O | ⓘClinoptilolite Subgroup | (Na/Ca/K)3-6[Al6-7Si29-30O72] · 20H2O |
| O | ⓘErionite Subgroup | M2[Al4Si14O36] · 15H2O |
| O | ⓘGyrolite | NaCa16Si23AlO60(OH)8 · 14H2O |
| O | ⓘMordenite | (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O |
| O | ⓘQuartz | SiO2 |
| Na | Sodium | |
| Na | ⓘClinoptilolite Subgroup | (Na/Ca/K)3-6[Al6-7Si29-30O72] · 20H2O |
| Na | ⓘGyrolite | NaCa16Si23AlO60(OH)8 · 14H2O |
| Na | ⓘMordenite | (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O |
| Al | Aluminium | |
| Al | ⓘClinoptilolite Subgroup | (Na/Ca/K)3-6[Al6-7Si29-30O72] · 20H2O |
| Al | ⓘErionite Subgroup | M2[Al4Si14O36] · 15H2O |
| Al | ⓘGyrolite | NaCa16Si23AlO60(OH)8 · 14H2O |
| Al | ⓘMordenite | (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O |
| Si | Silicon | |
| Si | ⓘQuartz var.Chalcedony | SiO2 |
| Si | ⓘClinoptilolite Subgroup | (Na/Ca/K)3-6[Al6-7Si29-30O72] · 20H2O |
| Si | ⓘErionite Subgroup | M2[Al4Si14O36] · 15H2O |
| Si | ⓘGyrolite | NaCa16Si23AlO60(OH)8 · 14H2O |
| Si | ⓘMordenite | (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O |
| Si | ⓘQuartz | SiO2 |
| S | Sulfur | |
| S | ⓘPyrite | FeS2 |
| K | Potassium | |
| K | ⓘClinoptilolite Subgroup | (Na/Ca/K)3-6[Al6-7Si29-30O72] · 20H2O |
| K | ⓘMordenite | (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O |
| Ca | Calcium | |
| Ca | ⓘClinoptilolite Subgroup | (Na/Ca/K)3-6[Al6-7Si29-30O72] · 20H2O |
| Ca | ⓘGyrolite | NaCa16Si23AlO60(OH)8 · 14H2O |
| Ca | ⓘMordenite | (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O |
| Fe | Iron | |
| Fe | ⓘPyrite | FeS2 |
Other Regions, Features and Areas containing this locality
North America
- Coast MountainsMountain Range
North America PlateTectonic Plate
- Pacific Coast RangesAccretionary Complex
- Siletzia DomainDomain
- Western Washington–Oregon BasinsBasin
Pacific OceanOcean
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References
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Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2025, except where stated. Most political location boundaries are© OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 byJolyon Ralph.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844.doi:10.2138/am-2024-9486.
Privacy Policy -Terms & Conditions -Contact Us / DMCA issues -Report a bug/vulnerabilityCurrent server date and time: November 30, 2025 03:12:10 Page updated: November 25, 2025 22:30:21
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2025, except where stated. Most political location boundaries are© OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 byJolyon Ralph.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844.doi:10.2138/am-2024-9486.
Privacy Policy -Terms & Conditions -Contact Us / DMCA issues -Report a bug/vulnerabilityCurrent server date and time: November 30, 2025 03:12:10 Page updated: November 25, 2025 22:30:21