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Granitic Gneiss Rock Quarries No. Ek-021

Past Producer in Fairfield county in Connecticut, United States with commodity Stone
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Host and associated rocks
  8. Nearby scientific data
  9. Ore body information
  10. Controls for ore emplacement
  11. Economic information about the deposit and operations
  12. Mining district
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10068194
MRDS ID W001142
Record type Site
Current site name Granitic Gneiss Rock Quarries No. Ek-021
Related records 10216459

Geographic coordinates

Geographic coordinates: -73.11537, 41.32471 (WGS84)

Site location context

Political divisions (FIPS codes)

Fairfield(county)

Connecticut(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Ansonia(quadrangle 1:24,000 scale)

Bridgeport(quadrangle 1:100,000 scale)

Hartford(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Housatonic(hydrologic unit)

Connecticut Coastal(hydrologic accounting unit)

Connecticut Coastal(hydrologic subregion)

New England(hydrologic region)

Geographic areas

Country State County
United States Connecticut Fairfield

Commodities

Commodity Importance
Stone Primary

Comments on the commodity information

  • INFORMATION LACKING. GRANITIC GNEISS MEDIUM GRAINED, WELL FOLIATED, WELL LINEATED, VERY PALE BLUISH GRAY TO YELLOWISH GRAY. THIN GRANITIC BODY ABOUT 1300 FEET LONG, LESS THAN 150 FEET WIDE; FOLIATION STRIKE N. 25 DEG. EAST, DIP 85 DEG. SE. ADDITIONAL QUARRY 200 FEET TO NE.

Materials information

Materials Type of material
Gneiss Ore
Apatite Gangue
Biotite Gangue
Garnet Gangue
Microcline Gangue
Muscovite Gangue
Quartz Gangue
Tourmaline Gangue
Zircon Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite > Diabase
    Stratigraphic age (youngest) Early Devonian
    Stratigraphic age (youngest) Late Triassic
  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
  • Host or associated Host
    Rock type Metamorphic Rock > Gneiss

Nearby scientific data

(1) -73.11537, 41.32471
ListMap

Economic information

Ore body information

  • Strike N. 25 DEG. EAST
    Dip 85 DEG. SE.
    Length 396.24M
    Width 150M

Controls for ore emplacement

  • Metamorphosed Granitic Intrusive

Comments on the geologic information

  • GEOL.DESC: MICROCLINE CONTENT HIGHEST WHERE ASSOCIATED WITH OLDER CAMBRIAN ORDOVICIAN METAMORPHOSED GRANITIC INTRUSIVE PROSPECT GNEISS; ELSE MORE PLAGIOCLASE. ANSONIA GNEISS GRANITIC TO QUARTZ DIORITIC BUT COMMONLY QUARTZ MONZONITIC GNEISS. XENOLITHS COMMON.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Non-metallic
Significant No
Production years UNKNOWN

Mining district

District name Shelton

Comments on the production information

  • INFORMATION LACKING. PROBABLY ONLY SMALL AMOUNT OF CONSTRUCTION STONE PRODUCED FROM EACH QUARRY.

Comments on the reserve resource information

  • FIGURES LACKING. PROBABLY LARGE VOLUME OF ROCK REMAINS IN LONG THIN BODY.

Comments on development

  • TOTAL$: US

Reference information

Bibliographic references

  • Deposit

    ARMSTRONG, R. L., 1970, "CONTRI. TO GEOCHRON. CONN.", CONN. GEOLOGICAL SURVEY, R. I. NO. 5, MAP, TEXT, PG. 19 TO 28

  • Production

    FRITTS, 1965.

General comments

Subject category Comment text
Deposit FRITTS' MAP AT 1:24000 LOCATES QUARRIES BY SYMBOL. ARMSTRONG GIVES GEOCHRON DATE OF ANSONIA AS 321 M. Y., MISSISSIPPIAN. ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1972 D'Agostino, John P. U.S. Geological Survey

Beyond USGS

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

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