Annotated record of the detailed examination of Mn deposits from ARA Islas Orcadas Cruise 16 core stations@en

The purpose of this volume, the seventh in a series of similar publications (Goodell, 1964, 1965, 1968; Frakes 1971, 1973 ; Cassidy et al., 1977), is to continue a presentation to the research community of sediment core descriptions and attendant data of cored and otherwise obtained sediments retrieved in waters of the Southern Ocean aboard the research vessel, ARA Islas Orcadas (formerly, USNS Eltanin), as a part of the circumpolar survey begun by Eltanin in 1962 (see issue of Antarctic Journal of the United States, Vol. 8, No. 3, 1973). The data presented herein are concerned with the results of coring activities aboard cruise 1678 of Islas Orcadas, the fith and final marine geology coring cruise of this vessel under the terms of the present United States-Argentine agreement. The core descriptions are organised as follows: 1) a brief summary of the coring objectives of the cruise, together with a discussion of core recovery; 2) a table and map of station location data for materials retrieved; 3) a table of tentative age-dates for each piston core; 4) an explanation of the laboratory procedures and descriptive criteria used in the description of the sediments, and 5) lithologic descriptions of the piston and trigger cores, and the piston and trigger core bag samples.本卷为系列同类出版物的第七册（Goodell, 1964, 1965, 1968; Frakes 1971, 1973; Cassidy et al., 1977），旨在继续向科研界呈现由ARA Islas Orcadas号（前身为USNS Eltanin）研究船在南大洋水域采集的沉积岩心描述及配套数据，这些取芯获取及其他途径获得的沉积物是Eltanin号1962年启动的环极调查的一部分（详见《美国南极期刊》（Antarctic Journal of the United States）1973年第8卷第3期）。 本文所呈现的数据均来自ARA Islas Orcadas号第1678航次的取芯作业成果，该航次是本船依据当前美阿协议开展的第五次且为最后一次海洋地质取芯航次。 本卷的岩心描述按如下结构编排：1）本次航次取芯目标简要概述，附岩芯回收率相关讨论；2）采样站位位置数据表与分布图；3）各活塞岩心的暂定年代数据表；4）沉积物描述所采用的实验室流程与描述标准说明；5）活塞岩心、触发式岩心及其袋样的岩性描述。