Mentions in text a thick limestone at the top of the Shady dolomite in the vicinity of Ivanhoe, Wythe Co., VA and calls it the Ivanhoe limestone member. This name was adopted from an unpublished manuscript by L.W. Currier.

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

Named for exposures at and around Ivanhoe, Wythe Co., VA. Restricted as a recognizable unit in southwestern VA between Huddle and Galena, VA in Wythe Co. area. Unit is a thick body of limestone above saccharoidal dolomite member of Shady. This limestone body increases thickness of Shady by 500 feet. It is apparently a lenticular bed traceable for no more than 9 miles east and west of Ivanhoe. Composed of thick, massive beds of dense gray limestone containing a few relatively thin beds of light-gray to white dolomite, saccharoidal in part, and very thin reddish sandy and argillaceous partings. Shown on geologic section as Lower Cambrian; thickness 0 to 500 feet.

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

Included Ivanhoe limestone member in lower part of the Rome formation (previously uppermost member of Shady dolomite). They believed this well bedded, fine-grained limestone and dolomite with thin reddish sandy and argillaceous partings resembled Rome more so than the underlying, massive Shady.

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

Reassigned Ivanhoe Member from the Rome Formation to the Shady Dolomite, citing Pfeil and Read (1976, Reefal carbonates and associated lithologies, Cambrian Shady Dolomite, Austinville region, VA: GSA Abstracts w/ Programs, vol. 8, p. 244). This change is reflected on Table 1 and figure 8.

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