(Table, page 500) Geochemistry of a pancake-shaped concretion from lake Charlotte, Canada

A pancake-shaped concretion from Ship Harbour Lake, a small freshwater lake in eastern Nova Scotia (now named Lake Charlotte) is part of collection sent to the National Museum of Canada by Mr. R. A. Logan, of the Pan American Airvays. These concretions are of similar to the well-known marine concretions with a composition similar to wad. These are known only from abyssmal depths of the sea in the red clay deposits, while the present concretions occur in very shallow lake waters. They should be of interest to geologists, who may be concerned with the rather difficult problem which some concretions raise of distinguishing between concretions of syngenitic and epigenetic origin.

Annotated record of the detailed examination of Mn deposits from MIDPAC Expedition stations

The cores described in this report were taken on MIDPAC (Middle Pacific) Expedition in August-September 1950 by Scripps Institution of Oceanography from, the R/V Horizon. A total of 106 cores and dredges were recovered and are available at Scripps for sampling and study. The coring sites, all in the tropical central Pacific.

Annotated record of the detailed examination of Mn deposits from SOMIRMAS cruise stations

The cores and dredges described at this site were taken on the SOMIRMAS cruise from 5 July to 14 August 1990 by the MusÈum National d'Histoire Naturelle from the R/V Marion Dufresne. A total of 30 cores and dredges were recovered and are available at MNHN for sampling and study.

Annotated record of the detailed examination of Mn deposits from SEYMAMA-SHIVA cruise stations

The cores and dredges described at this site were taken on the SEYMAMA-SHIVA cruise from 17 August to 14 September 1990 by the MusÈum National d'Histoire Naturelle from the R/V Marion Dufresne. A total of 33 cores and dredges were recovered and are available at MNHN for sampling and study.