Observation of ferromanganese deposits in the Baltic Sea

Baltic sediments have been studied by Behrens, Munthe, Küppers, Spethmann, Apstein, Sjöstedt, Pratje and the writer. The following types of sediments have been observed: varved and non-varved late-glacial clays, gray and black, post-glacial muds, and sands. The organic content of late-glacial clays ordinarily is less than 1.3 per cent, and of post-glacial muds more than 3 per cent. Sediments containing intermediate quantities are scarce. This can be explained as a result of the changed balance between organic and inorganic sedimentation when the glacial period ended; the abundance of fresh detritus then suddenly ceased and inorganic sedimentation became very much slower than before; consequently, the relative amount of organic detritus increased. As most of the material was not subjected to biological analysis, it has not been possible to distinguish different ages among post-glacial sediments.

La verdad de lo ocurrido en el Banco Argandoña y en la carretera "Bruce, Chessor & Ca." /

Mode of access: Internet.

Andrew Bruce, UM Track, 1980

[1908 Central Collegiate Meet]

Andrew Bruce, UM Track, 1980

[1980 Central Collegiate Meet]

Andrew Bruce, UM Track, 1980

[1980 Central Collegiate Meet]

Butch Woolfolk, Andrew Bruce, UM Men's Track, 1981 vs Chicago Track Club

[Woolfolk receiving relay baton from Bruce]