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Molalla High-Alumina Clay

Occurrence in Clackamas county in Oregon, United States with commodities Kaolin, Aluminum, Iron
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Host and associated rocks
  9. Nearby scientific data
  10. Ore body information
  11. Economic information about the deposit and operations
  12. Land status
  13. Reserves and resources
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10036517
MRDS ID M025349
Record type Site
Current site name Molalla High-Alumina Clay
Alternate or previous names Ellis and Dibble Deposits

Geographic coordinates

Geographic coordinates: -122.55674, 45.05537 (WGS84)

Site location context

Political divisions (FIPS codes)

Clackamas(county)

Oregon(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Wilhoit(quadrangle 1:24,000 scale)

Oregon City(quadrangle 1:100,000 scale)

Vancouver(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Molalla-Pudding(hydrologic unit)

Willamette(hydrologic accounting unit)

Willamette(hydrologic subregion)

Pacific Northwest(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management OR)

Bureau of Land Management OR BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States Oregon Clackamas

Public Land Survey System information

Meridian Township Range Section Fraction State
Willamette 006S 002E 15 Oregon

Commodities

Commodity Importance
Kaolin Primary
Aluminum Critical Primary
Iron Primary

Materials information

Materials Type of material
Halloysite Ore
Kaolinite Ore
Montmorillonite Ore

Host and associated rocks

  • Host or associated Host
    Rock type Unconsolidated Deposit > Clay, Mud
    Rock unit name Molalla
    Rock description Molalla
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Pliocene

Nearby scientific data

(1) -122.55674, 45.05537
ListMap

Economic information

Ore body information

  • Thickness 40.54M

Economic information about the deposit and operations

Development status Occurrence
Commodity type Both
Deposit size Small
Significant No
Discovery year 1911

Land status

Ownership category Private

Reserves and resources

  • Type In-situ
    Estimate year 1944
    Total resources 22222000mt ore
    Commodity Subtype Grade units Group Importance Year
    Aluminum Al2O3 26.37 wt-pct Aluminum Major 1944
    Iron Fe2O3 8.01 wt-pct Iron Major 1944

Comments on development

  • RATIO OF OVERBURDEN OF 2:1. USBM SAMPLED EXTENSIVELY IN 1942 AND 1943

Reference information

General comments

Subject category Comment text
Deposit FOUR ORE BODIES

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1981 Ferns, Mark L. (Brooks, Howard C.) Oregon Department of Geology and Mineral Industries
Updater 01-AUG-1993 Gray, Jerry J. Oregon Department of Geology and Mineral Industries

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

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