zzzzzPg. 156, 158. Vly Summit member, upper member of Great Meadows formation (new) [author does not capitalize rank terms; however, units are considered formal]. Consists of 2 feet of even-bedded, slightly dolomitic siltstone, followed by 40 feet of dolomite, free from vermicular markings but containing irregular chert masses. Overlies Skene member. Underlies Smith Basin limestone. [Age is Early Ordovician (early Canadian).] Canadian treated as system in this report. [Author states that his philosophy of nomenclature is contrary to "the present fashion of delimiting formations on lithology alone." The resulting proposed divisions of the El Paso Group are thus "a succession of strata and faunas."]
Type section: along road leading east from Smith Basin, Fort Ann quadrangle, eastern NY. Named for Vly Summit, NY (misnamed Fly Summit).

Source: US geologic names lexicon (USGS Bull. 1350, p. 799).