Glaciomarine deposits of Miocene through Holocene age in the Yakataga Formation along the Gulf of Alaska margin, Alaska

Abstract

Thls report is preliminary and hae not been edited o r reviewed for conformity with Geological Survey standards and nomenclature.

Geologic map of southeastern Alaska

“…mapping 3 - others, 1983 4 -MacKevet t, 1963 5 - Eberlein and others, 1983 6 - Redmon, 1981 7 - Berg and others, 1978 8 - Hutchison and others, 1979 9 - Elliott and Koch, 1981 10 - Brew and others, 1984 I I - Souther and others, 1979 l Z - Buddington and Chapin, 1929 13 - Lathram and others, 1965 14 - Loney and others, 1975 I S - Johnson and Karl, 1982 16 - Decker and Plafker, 1982 17 -G. Plafker and T. Hudson, unpub. :napping 18 - Brew and others, 1978 19 - Rossmon, 1963 20 - Lothratn and others, 1959 2 1 - Ford and Brew, 1977 22 - Ford and Stew, 1973 23 - Brew and Ford, 1977 24 - Brew and ~llorrell, 1980 25 - Brew and Grybeck, 1984 26 -Souther, I97 I 27 - Werner, 1978 28 - Plafker and Hudson,1' 80 29 - Robertson, 1959 30 - Redman and others, 1984 3 1 - MacKevett and others,197h 32 - Campbell and Dodds, 1993 33 -F. Barker (Plafker and Addicott, 1976;George Plafker, written commun., 1984).…”

Foraminiferal biostratigraphy and correlations in the Gulf of Alaska Tertiary Province

“…Such assemblages indicate shelf water depths, possibly no greater than 150 meters. Molluscan data substantiate cool to cold water and shelf depths throughout the section (Plafker and Addicott, 1976;Addicott, unpub. data 1978) (2) MIDDLETON ISLAND STATE #1 WELL The faunal data available to us for this well are very meager to a depth of approximately 2,050 feet.…”

“…Specimens from the upper part of the section are usually well preserved and relatively undeformed, whereas in the lower part of the section they are discolored (generally an amber color), sometimes deformed, and display fewer morphologic details. The foraminiferal data indicate that the Middleton Island section is Pliocene and Pleistocene in age and paleomagnetic data indicate that it is probably largely Pleistocene (Plafker and Addicott, 1976).…”

Journal of Research of the U. S. Geological Survey, 1978, volume 6, issue 5

“…The megafauna indicate the base of the sequence is probably of early Miocene age in the Yakataga and Malaspina districts and possibly as old as late Oligocene in the Katalla district (Plafker and Addicott, 1976).…”

“…Age determinations have been based, for the most part, on generalized molluscan data published nearly 100 years ago (Whiteaves in Dawson, 1880). Because this early work predated the definitive description of Neogene molluscan faunas of the eastern North Pacific, the determinations were mostly of genera and, therefore, do not permit accurate correlation with the subsequently developed provincial molluscan chronology (Arnold and Hannibal, 1913;Weaver, 1916;Weaver and others, 1944;Addicott, 1976).…”