Winter Operations : March 1970 / Norbert W. O'Hara ... [et al.].

marks. Near the completion of our search pattern we approached a large
piece of ice that was anchored to the bottom in 12 feet of water. A
furrow in the bottom varying in depth from 6 inches to 1 foot was
observed under the section of ice that was anchored to the bottom.
The submerged area of this large piece of ice was tapered down to a
point that was embedded in the sand.
Upon completion of the first dive weather conditions had become
marginal for diving. It was decided to terminate diving operations.
Another attempt to recover the periphyton collectors and conduct
a survey for the effects of ice scour is scheduled for the first part
of April.

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