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Shipboard examination of the interbedded laminated marls, bioturbated limestones, and sandstone to claystone turbidites of Lower Cretaceous lithologic Unit V at Site 603 revealed the presence of ammonites and aptychi. An entire ammonite was found on the upper surface of a whole-core interstitial water sample (see frontispiece). The ammonites and the aptychus were examined in an attempt to determine their taxonomy and age. Unfortunately, the ammonites found in Hole 603B consist of poorly preserved fragments of long-ranging forms that can only be tentatively identified. These ammonite remains do not merit more than a short taxonomic note. A sample originally identified aboard ship as a section through a double-valved aptychus has subsequently been identified as belonging to a fish. This constitutes the second find of identifiable vertebrate remains in a Deep Sea Drilling Project hole, the first being the fish vertebrae from Leg 41, Section 367-18-2 (Lancelot, Seibold, et al., 1978, frontispiece A).

Remains of Early Cretaceous Ammonites and of a Fish from Deep Sea Drilling Project Site 603