1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Little Rock Placer

Prospect in Lewis and Clark county in Montana, United States with commodity Gold
Map
XML
JSON
KML
C
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. Geologic structures
  11. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Mining district
  14. Ownership information
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10022842
MRDS ID FS00338
Record type Site
Current site name Little Rock Placer

Geographic coordinates

Geographic coordinates: -112.07838, 46.5499 (WGS84)
Elevation 1463
Relative position 1/4 MILE NE OF UNIONVILLE

Site location context

Political divisions (FIPS codes)

Lewis and Clark(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Helena(quadrangle 1:24,000 scale)

Elliston(quadrangle 1:100,000 scale)

Butte(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Missouri(hydrologic unit)

Upper Missouri(hydrologic accounting unit)

Missouri-Marias(hydrologic subregion)

Missouri(hydrologic region)

Federal lands

Helena-Lewis and Clark National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Montana Lewis and Clark

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 009N 004W 11 Montana

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold Ore

Analytical data

Result ASSAY REPORT: AU 4.32 MGS OR .10 DOLLARS/CUBIC YARD

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
    Rock unit name Boulder Batholith
    Rock description Boulder Batholith
    Stratigraphic age (youngest) Mississippian
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock
    Rock unit name Madison Formation
    Rock description Madison Formationt

Nearby scientific data

(1) -112.07838, 46.5499
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Boulder Batholith

Controls for ore emplacement

  • Contact Point

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic
Significant No
Discovery year 1932
Discoverer Harold Little

Mining district

District name Helena District

Ownership information

  • Type Owner
    Owner Florian Glineski

Comments on the workings information

  • NO. 1 CUT; 15 FEET LONG BY 12 FEET WIDE BY 14 FOOT FACE. NO 2 TEST HOLE; 2.5 FEET LONG BY 18 INCHES WIDE BY 2 FEET DEEP NO. 3 CUT; 21 FEET LONG BY 7 FEET WIDE BY 8 FOOT FACE. FRAME DWELLING SHED AND GARAGE IN GOOD REPAIR

Reference information

Bibliographic references

  • Deposit

    FS FILES

  • Deposit

    1958 DIREXPL USF

General comments

Subject category Comment text
Deposit THE MAJOR ORE LOCUS ON THE CLAIM IS AT THE CONTACT POINT OF LIMESTONE AND GRANITE

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1976 Steward, Candis A. U.S. Geological Survey

Beyond USGS

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

Maps centered on this site