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Authors: Marincovich, Louie , Jr. , Kase, Tomoki
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Date: /1986
Title: An occurrence of Turritella (Hataiella) sagai in Alaska: Implications for the age of the Bear Lake Formation
12 , 2 , 61-66 , 2 figs.
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Document Type: Article\Abst.\Chapter\report
Annotation: Abstract. The gastropod Turritella (Hataiella) sagai Kotaka, 1951, previously known only from Miocene faunas of Japan, occurs in the Bear Lake Formation of the Alaska Peninsula in southwestern Alaska, U.S.A. Planktonic-microfossil and radiometric dates available for some of the Japanese occurrences indicate an age-range for this species of about 15-16 Ma, within the earliest middle Miocene. The presence of T. (H.) sagai provides the first reliable evidence for an age as great as earliest middle Miocene for strata in the Bear Lake Formation.
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77AM22 (Cenozoic loc. M7152) , Port Moller , Shoreline exposure on south shore of Ukolnoi Island, about 120 meters north and 240 meters west of the southeast corner of Section 29, T. 57 S., R. 81 W., Port Moller (A-5) quadrangle; latitude 55 deg. 12.5' N, longitude 161 deg. 35.8' W; Alaska Peninsula, southwestern Alaska. Collected by L. Marincovich, Jr. and H. McLean, 1977: field locality 77AM22; equivalent to LACMIP locality 11011.
Turritella (Hataiella) sagai Kotaka, 1951
77AM23 (Cenozoic loc. M7153) , Port Moller , Same general locality as M7152, but about 60 to 120 meters farther to the southwest along sea cliff. Collected by L. Marincovich, Jr., 1977; field locality 77AM23; equivalent to LACMIP locality 11012.
Turritella (Hataiella) sagai Kotaka, 1951
77AM24 (Cenozoic loc. M7154) , Port Moller , Same general locality as M7153, but 60 to 120 meters southwestward along sea cliff. Collected by L. Marincovich, Jr., 1977; field locality 77AM24; equivalent to LACMIP locality 11013.
Turritella (Hataiella) sagai Kotaka, 1951