Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Molalla High-Alumina Clay Occurrence, Clackamas County, Oregon, USAi
Regional Level Types
Molalla High-Alumina Clay OccurrenceOccurrence
Clackamas CountyCounty
OregonState
USACountry

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Latitude & Longitude (WGS84):
45° 3' 20'' North , 122° 33' 20'' West
Latitude & Longitude (decimal):
45.05556,-122.55556
GeoHash:
G#: c20b74jg8
GRN:
N31W62
Type:
Occurrence
Köppen climate type:
Csb : Warm-summer Mediterranean climate
Nearest Settlements:
PlacePopulationDistance
Scotts Mills367 (2017)9.0km
Molalla8,972 (2017)10.3km
Mulino2,103 (2011)18.6km
Silverton9,753 (2017)18.7km
Mount Angel3,437 (2017)19.2km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Clackamette Mineral and Gem ClubOregon City, Oregon34km
Columbia-Willamette Faceters' GuildPortland/West Linn, Oregon36km
Willamette Agate and Mineral Society, Inc.Salem, Oregon40km
Mindat Locality ID:
150401
Long-form identifier:
mindat:1:2:150401:2
GUID (UUID V4):
0


REF:Deposit:: OREGON METAL MINES HANDBOOK, 1951, ODGMI BULL. 14-D, P. 20
Deposit:: NICHOLS, R.L., 1944, PRELIMINARY REPORT ON THE MOLALLA HIGH-ALUMINA CLAY DEPOSIT NEAR MOLALLA, CLACKAMAS COUNTY, OREGON; USGS STRATEGIC MINERALS INVESTIGATIONS
Commodities (Major) - Clay - Kaolin, Iron, Aluminum
Development Status: Occurrence
Host Rock Unit: Columbia River Basalt
Host Rock: Clay, Mud

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

Mineral list contains entries from the region specified including sub-localities

3 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Rock list contains entries from the region specified including sub-localities

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Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Halloysite
Formula: Al2(Si2O5)(OH)4
ⓘ Kaolinite
Formula: Al2(Si2O5)(OH)4
ⓘ Montmorillonite
Formula: (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 9 - Silicates
ⓘMontmorillonite9.EC.40(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
ⓘKaolinite9.ED.05Al2(Si2O5)(OH)4
ⓘHalloysite9.ED.10Al2(Si2O5)(OH)4

List of minerals for each chemical element

HHydrogen
Hⓘ HalloysiteAl2(Si2O5)(OH)4
Hⓘ KaoliniteAl2(Si2O5)(OH)4
Hⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
OOxygen
Oⓘ HalloysiteAl2(Si2O5)(OH)4
Oⓘ KaoliniteAl2(Si2O5)(OH)4
Oⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
NaSodium
Naⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
MgMagnesium
Mgⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
AlAluminium
Alⓘ HalloysiteAl2(Si2O5)(OH)4
Alⓘ KaoliniteAl2(Si2O5)(OH)4
Alⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
SiSilicon
Siⓘ HalloysiteAl2(Si2O5)(OH)4
Siⓘ KaoliniteAl2(Si2O5)(OH)4
Siⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
CaCalcium
Caⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O

Other Databases

Link to USGS MRDS:10036517

Localities in this Region

USA

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic Plate

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
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