These changes coincide with
the different palaeoclimate zones proposed in the models, so the faunal distribution was probably climate - related,» comments Josep Fortuny, an ICP researcher who took part in the study.
Both terrestrial and marine
palaeoclimate proxies (Thompson, 1991; Dowsett et al., 1996; Thompson and Fleming, 1996) show that high latitudes were significantly warmer, but that tropical SSTs and surface air temperatures were little
different from the present.