The Gaikema member is represented certainly by lots 51AHa11a, b, c as shown by the presence of the ammonities Emileia, Lissoceras, and Sonninia. The same species were obtained on the south shore of Tuxedni Bay in unit 33 of the section measured by Stanton and Martin (see U.S.G.S. Bull. 776, p. 142) as shown by specimens in lots 3009 and 21263.

The Fitz Creek member is represented by lots 51AHa9 and 10 as shown by the presence of species of Stemmatoceras and Oppelia identical with species obtained on the south shore of Tuxedni Bay in unit 19 of the section measured by Stanton and Martin. Grantz found the same species of Stemmatoceras in his lot 51AGz136, which is a short distance northeast of your localities.

The correlations of these members have been discussed in previous memoranda and are shown by charts in your possession.

The only fossil of stratigraphic value in the three lots from the Difficult member of the Tuxedni formation is an ammonite mold in lot 51AHa6. A clay squeeze of this ammonite compares closely with the adult whorls of Erycites from the basal beds of the Kialagvik formation on Wide Bay. You may recall that Don Miller and I found Erycites associated with Tmetoceras and Pseudolioceras at localities 48 AI 77 and 78 at a spot about 2.6 miles N. 77 W. of Fossil Point. This occurrence is about 350 feet above the highest lava beds and slightly lower stratigraphically than your lot 51AHa6. In Europe Tmetoceras characterizes the basal part of the Bajocian stage. The other genera occur in both the lower part of the Bajocian and the upper part of the Toarcian. From these occurrences it is evident that the thick lava sequence on Tuxedni Bay occupies the stratigraphic position of the Lower Jurassic.