Fig. 13

Paleogeographic map for 165 Ma (Bathonian, according to Gradstein et al. 2004) showing the oceanic basins discussed in the text, with continental crust in white and active margins in dark grey. This map represents an attempt to show the distribution of radiolarian assemblages taking in account the paleogeography and potential water currents. In the generally low-latitude context of the Proto-Caribbean and Central Pacific, “high-latitude-faunas” can be associated with intraoceanic subduction zones or active continental margins of the Americas, both acting as upwelling margins or providers of land nutrients inputs