Worcester Formation geographically and stratigraphically restricted to exclude Vaughn Hills Member, Harvard Conglomerate Lentil, and other unnamed units. Rank raised to Vaughn Hills Quartzite. May or may not correlate with Tower Hill Quartzite. Age changed to probable Ordovician or Silurian age.
Source: GNU records (USGS DDS-6; Reston GNULEX).
Used as Vaughn Hills Quartzite of Ordovician or Silurian age.
Source: GNU records (USGS DDS-6; Reston GNULEX).
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 ([ ]).