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Holbrook Granite Gneiss Rock Quarry

Past Producer in New Haven county in Connecticut, United States with commodity Stone, Dimension
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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. Workings at the site
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10068204
MRDS ID W001152
Record type Site
Current site name Holbrook Granite Gneiss Rock Quarry
Related records 10280999

Geographic coordinates

Geographic coordinates: -73.0712, 41.3636 (WGS84)

Site location context

Political divisions (FIPS codes)

New Haven(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 New Haven

Commodities

Commodity Importance
Stone, Dimension Primary

Comments on the commodity information

  • OPENED ABOUT 1877; IN 1911 QUARRY WAS 300 FEET LONG SW. TO NE., 150 FEET WIDE NW. TO SE., AND FROM 50 TO 70 FEET DEEP. GNEISS FOLIATION STRIKES N. 25 TO 30 DEG. EAST, DIPS 47 DEG. SOUTH, 65 DEG. EAST. SHEETS 2 TO 5 FEET THICK DIP 25 TO 30 DEG. EAST. PEGMATITES 6 INCHES TO 2 FEET COMMON. GRANITE MEDIUM BLUISH GRAY IN COLOR AND OF FINE GRAINED FINELY GNEISSOSE TEXTURE. IN 1911, OPERATORS SECCOMBE BROS.

Materials information

Materials Type of material
Microcline Gangue
Oligoclase Gangue
Orthoclase Gangue
Quartz Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Pegmatite

Nearby scientific data

(1) -73.0712, 41.3636
ListMap

Economic information

Ore body information

  • Thickness 1.52M

Controls for ore emplacement

  • Metamorphosed Granitic Intrusive

Comments on the geologic information

  • GEOL.DESC: WITHIN CAMBRO ORDOVICIAN PROSPECT GNEISS FORMATION. ADJACENT BIOTITE QUARTZ FELDSPAR SCHIST OF IGNEOUS ORIGIN WITH QUARTZ, BIOTITE MICROCLINE, ORTHOCLASE, PYRITE, GARNET. PEGMATITE WITH FELDSPAR, QUARTZ, MUSCOVITE AND TOURMALINE.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Non-metallic
Significant No
Year of first production 1877
Production years 1877 TILL AT LEAST 1911

Mining district

District name Seymour

Comments on the production information

  • FIGURES LACKING, PRODUCTION OF GOOD BUILDING STONE PROBABLY LARGE.

Comments on the reserve resource information

  • FIGURES LACKING, LARGE VOLUME OF GOOD BUILDING STONE PROBABLY REMAINS.

Workings at the site

  • Type of workings Unknown
    Overall length 91.44M
    Overall width 45.72M

Comments on development

  • TOTAL$: US

Reference information

Bibliographic references

  • Deposit

    ARMSTRONG, R. L., 1970, "CONTRI. TO GEOCHRON. IN CONN.", CONN. GEOL SURVEY, R. I. NO. 5, MAP, TEXT, PG. 19 TO 27

  • Production

    DALE, 1911.

General comments

Subject category Comment text
Deposit USGS, TOPO, 1964, "ANSONIA", AT 1:24000 SHOWS DEPRESSION AS POND. ARMSTRONG GIVES GEOCHRON AGE OF 320 M. Y. FOR A PROSPECT GNEISS THERMAL EVENT. ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-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.

Maps centered on this site