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Granitic Gneiss Rock Quarry No. Cj-058

Past Producer in Middlesex 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. Controls for ore emplacement
  10. Economic information about the deposit and operations
  11. Mining district
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10067693
MRDS ID W000494
Record type Site
Current site name Granitic Gneiss Rock Quarry No. Cj-058
Related records 10216429

Geographic coordinates

Geographic coordinates: -72.54896, 41.50888 (WGS84)

Site location context

Political divisions (FIPS codes)

Middlesex(county)

Connecticut(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Middle Haddam(quadrangle 1:24,000 scale)

Hartford(quadrangle 1:100,000 scale)

Hartford(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Outlet Connecticut River(hydrologic unit)

Lower Connecticut(hydrologic accounting unit)

Connecticut(hydrologic subregion)

New England(hydrologic region)

Geographic areas

Country State County
United States Connecticut Middlesex

Commodities

Commodity Importance
Stone Primary

Comments on the commodity information

  • NOT SHOWN ON TOPO SHEET AT 1:24000. MONSON GNEISS USUALLY HAS PARTINGS SEVERAL FEET APART; USED FOR SMALL BUILDING STONE. DARKENS ON WEATHERING. GENERAL STRIKE OF FOLIATION NW., DIP MODERATE TO EAST.
  • WORKED BRIEFLY FOR FELDSPAR 1930. PROSPECTED FOR FELDSPAR AND MICA 1943 BY FAUSTO BERTOLINI. IN 1943, PIT 65 FEET LONG NORTH-SOUTH, 20 FEET WIDE EAST-WEST, 15 FEET DEEP. THREE PEGMATITES, EACH WITH PROSPECT PITS, NORTHERN PIT LARGEST AND MOST DEVELOPED WITH LARGE PIT. IT STRIKES N. 2 DEG. WEST, DIPS 69 DEG. EAST, IS 240 FEET LONG, 25 FEET WIDE. PROPERTY OWNED BY DINO L. BERTOLINI IN 1954.

Materials information

Materials Type of material
Gneiss Ore
Biotite Gangue
Garnet Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Gneiss
    Stratigraphic age (youngest) Late Ordovician

Nearby scientific data

(1) -72.54896, 41.50888
ListMap

Economic information

Controls for ore emplacement

  • Granitic Intrusive

Comments on the geologic information

  • GEOL.DESC: PART OF NUMEROUS SWARMS OF NORTHWARD TRENDING DIKES MOSTLY IN NARROW OUTCROP ZONE OF COLLINS HILL SCHIST BUT ALSO IN EASTWARD ADJACENT LOWER PALEOZOIC GLASTONBURY GRANITE GNEISS AND WESTWARD ADJACENT PRE-ORDOVICIAN MIDDLETOWN GNEISS.
  • GEOL.DESC: USUALLY COARSE-GRAINED, LIGHT-GRAY; DARK BIOTITE-RICH BANDS 2 TO 4 INCHES THICK. BORDERED BY AMPHIBOLITE BAND AS MUCH AS 100 FEET THICK. SIMILAR TO ORDOVICIAN HADDAM GNEISS.

Economic information about the deposit and operations

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

Mining district

District name Haddam

Comments on the production information

  • PROSPECTED 1943; PRODUCTION FIGURES LACKING BUT AMOUNT PRODUCED SMALL. ESTIMATE BERYL 0.09% FOR NORTHERN DIKE, 0.11% FOR SOUTHERN DIKE. PRODUCED FELDSPAR CONCENTRATES.
  • FIGURES LACKING BUT PRODUCTION PROBABLY SMALL.

Comments on the reserve resource information

  • FIGURES LACKING BUT LARGE AMOUNTS OF FELDSPAR AVAILABLE FROM PEGMATITE DIKE SWARM.
  • FIGURES LACKING BUT LARGE VOLUME OF STONE REMAINS. HOWEVER SITE NOW LOCATED IN GEORGE DUDLEY SEYMOUR STATE PARK.

Comments on development

  • TOTAL$: US

Reference information

Bibliographic references

  • Deposit

    STUGARD, JR., F., 1958, "PEGMATITES OF MIDDLETOWN, CONN.", USGS BULL. 1042-Q, MAP, TEXT

  • Production

    STUGARD, 1958

General comments

Subject category Comment text
Deposit REPORT IN USGS FILES. STUGARD'S GEOL. MAP AT 1:24000. BROOKINS' GIVES GEOCHRON DATES OF 260 M. Y. FOR SIMILAR PEGMATITES. ; INFO.SRC : 1 PUB LIT
Deposit STUGARD'S GEOL MAP AT 1:24000 LOCATES QUARRY BY SYMBOL. ; 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.

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