Abstract
Finely laminated Middle Eocene sediments from the central Arctic contain high abundances
of the delicate, sea ice–dwelling fossil diatoms Synedropsis spp. and sea ice–rafted
debris (sea ice–IRD), establishing an offshore seasonal sea ice regime ca. 47 Ma. Synedropsis
spp. co-occur with other diatom taxa and microfossils requiring open water. This strongly
indicates seasonality; nonetheless,
... read more