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Map showing publication footprint
  • Usage in publication:
    • Bates Pond lentil*
  • Modifications:
    • Named
  • Dominant lithology:
    • Gneiss
  • AAPG geologic province:
    • New England province
Publication:

Snyder, G.L., 1961, Bedrock geology of the Norwich quadrangle, Connecticut: U.S. Geological Survey Geologic Quadrangle Map, GQ-144, 1 sheet, scale 1:24,000 [http://ngmdb.usgs.gov/Prodesc/proddesc_592.htm]


Summary:

Bates Pond lentil in Putnam gneiss. A uniform unlayered gray gneiss that is uniformly granular and contains large porphyoblasts of black hornblende and flesh-colored soda-orthoclase as much as several centimeters in length. Age is pre-Pennsylvanian.
Named from exposures near Bates Pond, Norwich quadrangle, southeastern CT. Exposed in several lenticular bodies in southeastern corner of quadrangle.

Source: US geologic names lexicon (USGS Bull. 1350, p. 49).


Map showing publication footprint
  • Usage in publication:
    • Bates Pond Lentil*
  • Modifications:
    • Revised
  • AAPG geologic province:
    • New England province
Publication:

Dixon, H.R., 1964, The Putnam Group of eastern Connecticut, IN Contributions to stratigraphy: U.S. Geological Survey Bulletin, 1194-C, p. C1-C12.


Summary:

Since the Putnam is raised to group rank, the Bates Pond Lentil is now placed in the Tatnic Hill Formation of the Putnam Group.

Source: GNU records (USGS DDS-6; Reston GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Bates Pond Lentil*
  • Modifications:
    • Geochronologic dating
  • AAPG geologic province:
    • New England province
Publication:

Marvin, R.F., and Dobson, S.W., 1979, U.S. Geological Survey radiometric ages; Compilation "B": Isochron/West, no. 26, p. 3-32.


Summary:

Pg. 16, geologic time scale (inside front cover). Bates Pond Lentil of Tatnic Hill Formation of Putnam Group. A hornblende and soda orthoclase gneiss. Sample from Lat. 41 deg. 31 min. 46 sec. N., Long. 72 deg. 02 min. 02 sec. W., Norwich quadrangle, New London County, Connecticut, yielded Pb-alpha age of 280 +/-30 Ma (zircon); reconnaissance age. Ages published by Snyder (1964); recalculated using decay constants of Steiger and Jager, 1977 (Earth Planet. Sci. Letters, v. 36, p. 359-362).

Source: Publication.


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For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates published by U.S. Geological Survey authors.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).

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