bathyal zone

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Noun1.bathyal zone - the steep descent of the seabed from the continental shelf to the abyssal zone
References in periodicals archive ?
The biofacies analysis suggests that Panoba Formation was deposited in a variety of settings ranging from middle neritic zone to upper bathyal zone environments.
This assemblage is located in the lower-middle and the lower bathyal zone on the western margin of the Cocos Ridge (82[degrees] West), the middle part of the Carnegie Ridge, and the Panama Gulf (samples TR163-33 and H37).
Previous studies of the morphology, larval duration, physiological tolerances, and developmental timetables of deep-sea larvae from the bathyal zone have been reviewed by Young (2003).