Coccolith assemblages from the northwest slope of the Florida coast indicate sedimentation rates and temperature variations during the past. Time counts of Gephyrocapsa oceanica from 4 cores produced correlative curves that reflect the sedimentation rate. Ratios of the frequencies of Ceratolithus species and Discolithina species indicate that these genera were affected by similar parameters; a ratio of Discolithina morphotypes yields an apparent temperature curve. A magnetic intensity change correlates with a significant decrease in coccolith frequency.

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