Pt. 1, p. 50, 55 (fig. 12), 52-53, 166-167; Pt. 2, maps. Coal Valley Member of Chignik Formation. Name proposed for basal part of Chignik Formation. In type area consists of carbonaceous to lignitic shales, siltstones, and sandstones, locally bentonitic and weathering to typical orange and reddish-brown colors. Upper third of member consists of pebble and cobble conglomerate containing largely volcanic, granitic, and chert clasts. Thickness 1,250 feet in type area. Underlies unnamed upper part of formation. In type area occurs above Herendeen Limestone. Shown on geologic map of Alaska Peninsula. Age is Late Cretaceous (post-Santonian).
Type section: exposures on Staniukovich Mountain above Coal Valley, between Herendeen Bay and Port Moller, Alaska Peninsula, southwestern AK.
Type area: exposures in hills above Coal Valley and southeast of Staniukovich Mountain, Port Moller-Pavlof Bay, Alaska Peninsula, southwestern AK.

Source: US geologic names lexicon (USGS Bull. 1350, p. 162); supplemental information from GNU records (USGS DDS-6; Menlo GNULEX).