hemipelagic

hemipelagic

[¦he·mē·pə′laj·ik]
(ecology)
Of the biogeographic environment of the hemipelagic region with both neritic and pelagic qualities.
References in periodicals archive ?
2001): Geochemistry of pelagic and hemipelagic carbonates: criteria for identifying systems tracts and sea-level change.
Diagenesis, regular growth records of seasonality in inoceramidbivale shells from mid-Maastrichtian hemipelagic beds of the Bay of Biscay.
A stepwise extinction during the Mulde Event in the Homerian (Wenlock, Silurian) has been suggested for hemipelagic fauna such as graptolites and conodonts (Jaeger 1991; Jeppsson 1993; Kaljo et al.
In the deepest block (I) surficial sediments were classified as Globigerina clay devoid of an oxidized layer, whilst the adjacent block (II) contained an assorted biogenic hemipelagic biota (foraminifera, pteropods, scaphopods, micromolluscs, and echinoid and sponge spicules) and a discrete oxidized layer.
1988, Sulfide formation and hydrothermal alteration of hemipelagic sediment in Middle Valley, northern Juan de Fuca Ridge: Canadian Mineralogist, v.
ABSTRACT: Mid- to outer shelf (= offshore) marine deposits of hemipelagic dark-gray mudstone comprising the Mahantango Formation (Middle Devonian), Pike County, Pennsylvania, have yielded an assemblage of trace fossils.
Konta (1968) studied phyllosilicates in 122 samples of hemipelagic and pelagic muds from the northwestern region of the Indian Ocean surrounding the Arabian Peninsula.
Dm-bedded pelagic to hemipelagic siliceous mudstones and cherts and distal volcanic and calcareous turbidites form the substrate of the unconformity.
The Monterey Formation consists of siliceous hemipelagic shale deposited at bathyal depth (Pisciotto and Garrison 1981), whereas the Puente Formation consists of more terrigenous sediments derived from the southeastern San Gabriel Mountains deposited as turbidites on submarine fans at bathyal depths (Critelli et al.
These sediments occur between the hemipelagic organic-rich muds on the continental margin and carbonate sediments on the shallow shelf plateau--North Estonian Confacies Belt.
The box cores were collected from different environmental settings, from the iceberg-dominated glacial marine environment of East Greenland to the hemipelagic marine environment of the SW Iceland continental shelf (Fig.