All living lampridiforms are coastal or pelagic in temperate and tropical seas.
With time, the sedimentary environment evolved and pelagic carbonate sediments were deposited either as interpillow voids and/or interbedded with the radiolarian cherts.
The basalt-chert-pelagic limestone association (3) comprises oceanic basalts of supra-subduction zone-type chemical affinities, associated with siliceous (radiolarian) and calcareous pelagic sediments.
The entire sequence represents a shallowing-up cycle with goniatites and myriad pelagic styliolinids in the lower, and neritic tentaculitids and brachiopods in the upper unit.
A final point that may be made against the anoxiaextinction hypothesis is the detailed timing of the extinctions, particularly of pelagic taxa.
Geochemistry of pelagic and hemipelagic carbonates: criteria for identifying systems tracts and sea-level change.
Ichnofossils and ichnofabrics in rhythmically bedded pelagic/hemi-pelagic carbonates: recognition and evaluation of benthic redox and scour cycles.
The pilot whale, harbor porpoise, and bottlenosed dolphin are all pelagic animals, which forage at a variety of depths.
