Two major lithologic units are exposed at the pit: light olive gray (5Y6/1) to grayish yellow green (5GY7/2) smectitic shale overlain unconformably by oyster-bearing very pale orange (10YR8/2) and pale yellowish orange (10YR8/6), hematitic coquinoid
limestones, both of the Pliocene El Salto Formation (Fig.
It is made up of lenticular bedded, cm- to dm-thick, locally dolomitized oolitic coquinoid
limestones, passing laterally to red calcarenites and mudrocks.
Higher in the Tahula Beds the limestone interlayers become more frequent, and in the Kudjape Beds nodular argillaceous biomicritic limestones with coquinoid
interlayers prevail (Perens et al.
Ukoa" - - - Turnbull Mountain Formation Nepisiguit Falls Formation Lower Birch Island Member Vallee Lourdes Member Turnbull Mountain Tetagouche River locality locality Genera \ Host Rock felsic tuff siltstone Dolerorthis - - Monorthis x - "Paralenorthis" x x Productorthis x - Rugostrophia - x Schedophyla - - Skenidioides - - Tritoechia - x "Ukoa" X - Abundance indicated by: X (bold face) = very abundant, coquinoid
shell beds in places; x = moderate abundance to rare; - = not observed.
The Kudjape beds of the Kuressaare Formation (Ludfordian) are represented by nodular argillaceous biomicritic limestones containing coquinoid
Unsorted bioclastic to coquinoid
packstone tempestite (storm-layer) with fine rounded pebbles at the base.
The interval contains some interlayers of laminate, Eurypterus-, and bioturbated, pyrite-mottled dolostones forming the upper part of lower-rank sedimentary cyclites (minicyclites), as well as thin, pelletal and coquinoid
(gastropod, bivalve, ostracode) intercalations in their lower part.