- Usage in publication:
-
- Po River Metamorphic Suite*
- Modifications:
-
- Named
- Dominant lithology:
-
- Gneiss
- Schist
- AAPG geologic province:
-
- Piedmont-Blue Ridge province
Summary:
Named as part of Fredericksburg Complex (new). Named for Po River, Spotsylvania Co., eastern VA. Crops out along Po and Ni Rivers. Excellent fresh-rock exposures may be seen along Rappahannock River from the Fall Line, at US Rte 1 in Fredericksburg and Falmouth, upstream to the dam. Consists of biotite-bearing gneiss, two-mica schist, and numerous foliated gneissic granitoid and pegmatoid bodies. [No thickness or dimensions stated.] Correlates with lower part of Hatcher Complex of Brown (1969, Geology of the Dillwyn quadrangle: VDMR Report of Investigations 10, 77 p.) Age is uncertain but is probably Late Proterozoic and (or) early Paleozoic based on stratigraphic position beneath Ta River Metamorphic Suite (new) and Holly Corner Gneiss, both of which correlate to Early Cambrian(?) Chopawamsic Formation.
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
-
- Po River Metamorphic Suite*
- Modifications:
-
- Overview
- AAPG geologic province:
-
- Piedmont-Blue Ridge province
Summary:
Po River Metamorphic Suite is continuous with Maidens Gneiss to the south, which in turn has been correlated with Raleigh Gneiss of Farrar (1985) in NC.
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 ([ ]).