Primary Sources of Data for Columns A-U

(A) - Christiansen and Blank (1972); Love (1974a, 1974b); Smedes and Prostka (1972); Ruppel  (1972); U.S. Geological Survey (1972).

(B) - Brown (1982); Pierce (1978).

(C) - Gill and Cobban (1973); Keefer (1972); Pierce (1978).

(D) - Keefer (1970); Keefer and Van Lieu (1966): Pierce (1978).

(E) - Gill and Cobban (1973): Love and others (1978a, 1978b:, 1979b, 1980, 1990); Robinson and others (1964).

(F) - Gill and Cobban (1973); Love and others (1987, 1990).

(G) - Christiansen and others (1978); Love (1956, 1973); Love and others (1978c, 1992).

(H) - Denson snd Pipiringos (1974): Keefer (1965, 1972); Keefer and Van Lieu (1966).

(I) - Keefer (1965, 1970, 1972): Keefer and Van Lieu (1966); Love and others (1979b, 1979a, 1979b, 1979c).

(J) - Denson and Harshman (1969); Harshman (1968, 1972); Love (1970); Love and others (1979b, 1979c).

(K) - Love and others (1979b, 1980); Maughan (1964).

(L) - Denson and Botinelly (1949); Love and others (1949, 1980); Maughan (1964).

(M) - Love and others (1980); McGrew (1963).

(N) - Dorr and others (1977); Nelson (1973); Oriel and Platt (1980); Oriel and Tracey (1970); Rubey (1973); Rubey and others (1980).

(O) - Bradley (1954); Denson and Pipiringos (1974); Oriel and Platt (1980); Roehler (1991a).

(P) - Bradley (1964); Gill and others (1970): Roehler (1977).

(Q) - Denson and Pipiringos(1974); Love (1970); Love and others (1979c); Masursky (1962); Pipiringos (1961).

(R) - Roehler (1973, 1985, 1991a, 1991b).

(S) - Gill and others (1970); E.A. Merewether, U.S. Geological Survey (written communication, 1980).

(T) - Houston and others (1978, plate1); Maughan (1964).

(U) - Gill and Cobban (1973); Gill and others (1970); Love and others (1979b); Maughan (1964).

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