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Swilley Gulch Bog Iron Deposit

Past Producer in Lawrence county in South Dakota, United States with commodity 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. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Mining district
  14. Land status
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10055606
MRDS ID SD02202
Record type Site
Current site name Swilley Gulch Bog Iron Deposit

Geographic coordinates

Geographic coordinates: -103.75835, 44.1494 (WGS84)
Elevation 1707
Relative position 3 MILES NORTHWEST OF ROCHFORD, SOUTH DAKOTA

Site location context

Political divisions (FIPS codes)

Lawrence(county)

South Dakota(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Nahant(quadrangle 1:24,000 scale)

Rapid City(quadrangle 1:100,000 scale)

Rapid City(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Rapid(hydrologic unit)

Cheyenne(hydrologic accounting unit)

Cheyenne(hydrologic subregion)

Missouri(hydrologic region)

Federal lands

Black Hills 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 South Dakota Lawrence

Public Land Survey System information

Meridian Township Range Section Fraction State
Black Hills 002N 003E 09,10 South Dakota

Comments on the location information

  • ALONG THE GULCH IN SECTIONS 9 AND 10

Commodities

Commodity Importance
Iron Primary

Materials information

Materials Type of material
Goethite Ore
Limonite Ore

Host and associated rocks

  • Host or associated Host
    Rock type Unconsolidated Deposit > Alluvium
    Rock unit name Slates And Schists
    Rock description Slates And Schists
    Stratigraphic age (youngest) Holocene
    Stratigraphic age (youngest) Neoproterozoic

Nearby scientific data

(1) -103.75835, 44.1494
ListMap

Economic information

Ore body information

  • Thickness 0.61M
    Length 1609.3M
    Width 6.1M

Controls for ore emplacement

  • Valleys

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Significant No

Mining district

District name Rochford District

Land status

Ownership category National Forest
Area name Black Hills National Forest

Comments on the production information

  • BETWEEN 1200 AND 1500 TONS OF BOG IRON.

Reference information

Bibliographic references

  • Deposit

    U.S. BUREAU OF MINES, 1954, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART I, BUREAU OF MINES INFORMATION CIRCULAR 7688

  • Deposit

    U.S. GEOLOGICAL SURVEY, U.S. BUREAU OF RECLAMATION, AND SOUTH DAKOTA GEOLOGICAL SURVEY 1975, MINERAL AND WATER RESOURCES OF SOUTH DAKOTA, SOUTH DAKOTA GEOLOGICAL SURVEY BULLETIN 16

General comments

Subject category Comment text
Deposit IRON OCCURS INTERMITTENTLY ALONG THE GULCH FOR MORE THAN ONE MILE. DEPOSIT CONSISTS OF BEDDED IRON - RICH MATERIAL AND POROUS REPLACEMENT OF ORGANIC MATERIAL IN SWAMPY AREAS.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-OCT-1979 Barari, Rachel A. U.S. Geological Survey

Beyond USGS

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

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