Whetstone Creek Member of Bonneterre Formation. Uppermost member of Bonneterre Formation. At type section thickness 33 feet. Lower part consists of finely crystalline to calcarenitic limestone and calcareous fine sandstone and siltstone with green shale partings; contains abundant pellet glauconite, crinozoan and trilobite fragments. Upper part consists of finely crystalline, thin-bedded, argillaceous limestone. Overlies Sullivan Siltstone Member (new) of Bonneterre. Underlies Davis Formation [of Elvins Group], unconformably in places. Age is Late Cambrian (late Dresbachian to early Franconian), [based on fossils]. The Whetstone Creek is within the upper APHELASPIS Zone to lower ELVINIA-LINNARSSONELLA Zone.
Type section (subsurface): depth-interval 1,435.0 to 1,468.0 ft, St. Joe Minerals Corporation No. 64W133 (WR-1) core, in SE/4 SE/4 sec. 16, T. 29 N., R. 13 W., Wright Co., MO. Named from Whetstone Creek, near where type [core] was drilled.
Reference section (surface; = type Sullivan): Crooked Creek cryptoexplosive structure, in center E/2 NW/4 sec. 17, T. 36 N., R. 4 W., Crawford Co., MO.
[Misprint: US geologic names lexicon (USGS Bull. 1520, p. 332) indicates this unit is chiefly dolomite, which is incorrect.]

Source: Missouri lexicon (Thompson, 2001, Missouri Geol. Survey Rpt. Inv., no. 73, p. 314); GNU records (USGS DDS-6; Denver GNULEX); US geologic names lexicon (USGS Bull. 1520, p. 332).

Whetstone Creek is uppermost member of Bonneterre Formation. Locally within Central Missouri basin (Ozark uplift), the Whetstone changes to shale facies and becomes indistinguishable from overlying Davis Formation; there it is considered a lateral facies of Davis. Age is Late Cambrian (late Dresbachian and early Franconian).

Source: Modified from GNU records (USGS DDS-6; Denver GNULEX).

Pg. 19. Whetstone Creek Member of Bonneterre Formation. Is uppermost unit ot the Bonneterre Formation. Represents changing depositional conditions from the carbonate Bonneterre "platform" to the conditions prevalent in the deposition of the Davis shales and carbonates. Whetstone Creek sedimentation is defined by Kurtz et al. (1975, p. 13) as "shifting sites of deposition" with numerous paraconformities represented by zones of reworked acrotretid brachiopods at several different horizons. Whetstone Creek strata gradually thicken southwestward from only 8 feet thick in Crawford County, Missouri, to a maximum of 74 feet in Douglas County. West of Taney County, southwestern Missouri, Whetstone Creek strata begin to pinch out against the clastics of the Reagan Sandstone, although uppermost Whetstone Creek has been identified in Carroll County, Arkansas.

Source: Publication.

Pg. 314. The Whetstone Creek Member of the Bonneterre Formation overlies the Sullivan Siltstone Member of the Bonneterre, and [underlies] the Davis Formation. Age is Late Cambrian.

Source: Publication.

Pg. 14 (fig. 2-1), 15 (fig. 2-2), 17-18. Whetstone Creek Member of Bonneterre Formation. Poorly exposed in southeastern Missouri, but widespread in subsurface of central to southwestern Missouri. Thickness 8 to 74 feet (2.5 to 23 m). Is uppermost member of Bonneterre Formation; lies above Sullivan Siltstone Member. Lies below Davis Formation of Elvins Group. Age is early Late Cambrian (early Croixan; early Millardan; Steptoean), based on fossils. Ranges from APHELASPIS to DUNDERBERGIA trilobite zone; top is within the APSOLRETA EXPANSA brachiopod zone (APSOLRETA STRICTA subzone).

Source: Publication.

Pg. 38 (fig. 3-4), 121-127, 218 (App. A). Whetstone Creek Member of Bonneterre Formation. Type core corrected; depth-interval is from 1,435.0 feet to 1,495.0 feet. [On p. 8-9, Kurtz and others (1975) placed base of Whetstone Creek Member at 1,468.0 feet, and on p. 59 they placed it at 1,495.0 feet.] Consists of an upper unit, 1,435 to 1,468 feet, dominated by crinozoan calcarenites containing abundant pellet glauconite, and a lower unit, 1,468 to 1,495 feet, distinguished by fine sandstones, siltstones, and shales with limestone. Thickness 60 feet. Overlies Sullivan Siltstone Member of Bonneterre; underlies Davis Formation of Elvins Group. Age is early Late Cambrian (early Croixan; early Millardan; Steptoean).
Authors note the mining trench where Kurtz and others' (1975) designated a reference section for the Whetstone Creek is now partially filled in and only a small portion of in situ Whetstone Creek is exposed at west end.

Source: Publication.