Named as basal conglomerate of the Chappel formation [limestone] in central TX on the Llano uplift. No type locality designated. Described in Stop 18 on state hwy northeast of Cherokee and southeast of Chappel in San Saba Co as this bed being "made up of rounded chert cobbles derived from the Ellenburger and is fairly firmly cemented into a layer 8 inches to 1 ft thick." In Stop 17 to southwest on same hwy in San Saba Co, the white crinoidal Chappel limestone is separated from the underlying Ellenburger limestone by Eaves [Ives?] conglomerate, a reddish-brown, hard chert conglomerate; separated from the overlying Marble Falls limestone by black shale. Cross section. Geologic map. Of Mississippian age.

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

Revised; rank reduced to member status as basal member (of 3) of Houy Formation (new). Occurs in central TX on the Llano uplift. "Type Ives" given as Plummer locality, 205-T-125 (from columnar sections of the Houy Formation). Consists of lag deposits of detrital chert of varied age and source. Is rarely as much as 3 ft thick. Underlies Doublehorn Shale Member (new) of Houy; Houy Formation overlies Ordovician Honeycut Formation at some localities, and Devonian Stribling Formation at other localities. Term Zesch Formation suppressed since it is a partial synonym of the Ives Breccia Member in this report. Geologic maps. Conodonts listed. Measured sections. Of Middle? and Late Devonian age.

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