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Cape Lookout Quarry, Tillamook Co., Oregon, USAi
Regional Level Types
Cape Lookout QuarryQuarry
Tillamook Co.County
OregonState
USACountry

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Latitude & Longitude (WGS84):
45° 22' 45'' North , 123° 57' 14'' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
PlacePopulationDistance
Netarts748 (2011)6.2km
Oceanside361 (2011)9.2km
Tillamook4,997 (2017)12.0km
Beaver122 (2011)15.1km
Idaville337 (2011)16.1km


Zeolites were first found in Miocene tholeiitic basalt near Cape Lookout, Tillamook County, Oregon by John Cowles (cowlesite) in 1961. The best specimens were found in highly vesicular fine-grained basalt at the bottom of the quarry and in large boulders piled along the sides of the quarry. During a storm the weathered upper portion of the quarry collapsed covering the best material at the base of the quarry walls. It was not until the earily 1970's that the site became well known by collectors. Vegetation has reclaimed the quarry covering the boulders with moss and tall trees. With effort, specimens can still be obtained.

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


9 valid minerals.

Detailed Mineral List:

Calcite
Formula: CaCO3
Reference: Micro Probe Volume VI Number 4; Micro Probe (1990) Volume VII Number 1 pp 9-15
Chabazite-Ca
Formula: (Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Reference: Rudy Tschernich Zeolite Collection
Clinoptilolite-Ca
Formula: Ca3(Si30Al6)O72·20H2O
Reference: Wise, W.S. and Tschernich, R.W. (1976): Dachiardite-bearing zeolite assemblages in the Pacific Northwest, in: Sand, L.B. and Mumpton, F. (eds.): Natural Zeolites Occurrence, Properties, Use. Pergamon Press (Oxford, New York), pp. 105-111.
Dachiardite-Ca
Formula: (Ca,Na2,K2)5Al10Si38O96 · 25H2O
Reference: Micro Probe Volume IX Number 3
Erionite-Ca
Formula: (Ca,K2,Na2)2[Al4Si14O36] · 15H2O
Reference: Micro Probe Volume IX Number 3
Mordenite
Formula: (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
Reference: Micro Probe (1990) Volume VII Number 1 pp 9-15
Phillipsite-K
Formula: (K,Na,Ca0.5,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
Reference: Micro Probe Volume VI Number 4
Pyrite
Formula: FeS2
Reference: Micro Probe (1990) Volume VII Number 1 pp 9-15
Quartz
Formula: SiO2
Quartz var: Chalcedony
Formula: SiO2
'Smectite Group'
Formula: A0.3D2-3[T4O10]Z2 · nH2O
Reference: Micro Probe (1990) Volume VII Number 1 pp 9-15

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Pyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
var: Chalcedony4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Group 9 - Silicates
Chabazite-Ca9.GD.10(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Clinoptilolite-Ca9.GE.05Ca3(Si30Al6)O72·20H2O
Dachiardite-Ca9.GD.40(Ca,Na2,K2)5Al10Si38O96 · 25H2O
Erionite-Ca9.GD.20(Ca,K2,Na2)2[Al4Si14O36] · 15H2O
Mordenite9.GD.35(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
Phillipsite-K9.GC.10(K,Na,Ca0.5,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
Unclassified Minerals, Rocks, etc.
'Smectite Group'-A0.3D2-3[T4O10]Z2 · nH2O

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Group 77 - TECTOSILICATES Zeolites
Zeolite group - True zeolites
Chabazite-Ca77.1.2.1(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Dachiardite-Ca77.1.24.2(Ca,Na2,K2)5Al10Si38O96 · 25H2O
Mordenite77.1.6.1(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
Unclassified Minerals, Mixtures, etc.
Clinoptilolite-Ca-Ca3(Si30Al6)O72·20H2O
Erionite-Ca-(Ca,K2,Na2)2[Al4Si14O36] · 15H2O
Phillipsite-K-(K,Na,Ca0.5,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
Quartz
var: Chalcedony
-SiO2
'Smectite Group'-A0.3D2-3[T4O10]Z2 · nH2O

List of minerals for each chemical element

HHydrogen
H Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
H Phillipsite-K(K,Na,Ca0.5,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
H Dachiardite-Ca(Ca,Na2,K2)5Al10Si38O96 · 25H2O
H Erionite-Ca(Ca,K2,Na2)2[Al4Si14O36] · 15H2O
H Clinoptilolite-CaCa3(Si30Al6)O72·20H2O
H Smectite GroupA0.3D2-3[T4O10]Z2 · nH2O
H Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
CCarbon
C CalciteCaCO3
OOxygen
O Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
O CalciteCaCO3
O Phillipsite-K(K,Na,Ca0.5,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
O Dachiardite-Ca(Ca,Na2,K2)5Al10Si38O96 · 25H2O
O Erionite-Ca(Ca,K2,Na2)2[Al4Si14O36] · 15H2O
O Quartz (var: Chalcedony)SiO2
O Clinoptilolite-CaCa3(Si30Al6)O72·20H2O
O Smectite GroupA0.3D2-3[T4O10]Z2 · nH2O
O Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
O QuartzSiO2
NaSodium
Na Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
Na Phillipsite-K(K,Na,Ca0.5,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
Na Dachiardite-Ca(Ca,Na2,K2)5Al10Si38O96 · 25H2O
Na Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
AlAluminium
Al Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
Al Phillipsite-K(K,Na,Ca0.5,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
Al Dachiardite-Ca(Ca,Na2,K2)5Al10Si38O96 · 25H2O
Al Erionite-Ca(Ca,K2,Na2)2[Al4Si14O36] · 15H2O
Al Clinoptilolite-CaCa3(Si30Al6)O72·20H2O
Al Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
SiSilicon
Si Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
Si Phillipsite-K(K,Na,Ca0.5,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
Si Dachiardite-Ca(Ca,Na2,K2)5Al10Si38O96 · 25H2O
Si Erionite-Ca(Ca,K2,Na2)2[Al4Si14O36] · 15H2O
Si Quartz (var: Chalcedony)SiO2
Si Clinoptilolite-CaCa3(Si30Al6)O72·20H2O
Si Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Si QuartzSiO2
SSulfur
S PyriteFeS2
KPotassium
K Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
K Phillipsite-K(K,Na,Ca0.5,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
K Dachiardite-Ca(Ca,Na2,K2)5Al10Si38O96 · 25H2O
K Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
CaCalcium
Ca Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
Ca CalciteCaCO3
Ca Phillipsite-K(K,Na,Ca0.5,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
Ca Dachiardite-Ca(Ca,Na2,K2)5Al10Si38O96 · 25H2O
Ca Erionite-Ca(Ca,K2,Na2)2[Al4Si14O36] · 15H2O
Ca Clinoptilolite-CaCa3(Si30Al6)O72·20H2O
Ca Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
FeIron
Fe PyriteFeS2
BaBarium
Ba Phillipsite-K(K,Na,Ca0.5,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Holocene
0 - 0.0117 Ma



ID: 3017141
Alluvial deposits

Age: Anthropocene (0 - 0.0117 Ma)

Description: Sand, gravel, and silt forming flood plains and filling channels of present streams. In places includes talus and slope wash. Locally includes soils containing abundant organic material, and thin peat beds

Comments: Includes silt and fine sand deposited on broad benches adjacent to the Snake and Malheur Rivers by the Bonneville Flood (OR143; OR144; OR145; OR146) 14,000 years ago (late Pleistocene). In OR291, includes lacustrine silt, clay, and diatomite. Original map source: Miller, R.J., Raines, G.L., and Connors, K.A., 2002, Spatial digital database for the geologic map of Oregon: Geology compiled by G.W. Walker and N.S. MacLeod, USGS Open-File Report 03-67, scale 1:500,000.

Lithology: Major:{sand,gravel,silt}, Minor:{peat}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Miocene
5.333 - 23.03 Ma



ID: 1485473
Columbia River Basalt Group; Grande Ronde Basalt

Age: Miocene (5.333 - 23.03 Ma)

Stratigraphic Name: Grande Ronde Basalt

Description: Grande Ronde Basalt; basalt

Lithology: Major:: {basalt conglomerate}; Major:: {hyaloclastic breccia, cementation: clays, zeolites, clacite; lithology: palagonitic}; Major:: {carbonaceous mudstone, mineralogy: micaceous}; Major:: {carbonaceous sandstone, mineralogy: micaceous}; Major:: {pillow breccia}; Major:: {basalt flows, dark to light gray; lithology: tholeiitic}; Major:: {pillow flows, dark to light gray; lithology: tholeiitic basalt}

Reference: R.L. Smith, W.P. Roe (compilers). Oregon Geologic Data Compilation, release 6. State of Oregon Department of Geology and Mineral Industries. [20]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Wise, W.S. and Tschernich, R.W. (1976): Dachiardite-bearing zeolite assemblages in the Pacific Northwest, in: Sand, L.B. and Mumpton, F. (eds.): Natural Zeolites Occurrence, Properties, Use. Pergamon Press (Oxford, New York), pp. 105-111.
Micro Probe, Volume VI(4).
Micro Probe (1990), Volume VII(1): 9-15.
Micro Probe, Volume IX(3).


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