benthonic zone


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Noun1.benthonic zone - a region including the bottom of the sea and the littoral zonesbenthonic zone - a region including the bottom of the sea and the littoral zones
biogeographical region - an area of the Earth determined by distribution of flora and fauna
References in periodicals archive ?
Further subdivision of Middle Eocene into shallow benthonic zones (SBZ) is difficult due to lack of index taxa of alvelolinds, nummulitids and orthophragminids in our samples which are the key zonal markers for the Eocene sediments of Tethys.