English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Deep sea drilling off the east coast of North America provided valuable information on the development of the continental rise in a region that has been influenced by the deposition of both continentally derived and pelagic sediments. Site 603 is interpreted to overlie Jurassic oceanic crustal basement. Based upon the oldest sediment recovered, Site 603 was only influenced by pelagic sedimentation during the late Berriasian to Valanginian, with terrigenous sediment not appearing until the late Valanginian to Aptian. The first evidence of clastic sedimentation is the development of a large turbidite system during a time when deltas were being built on the shelf. From the Hauterivian through the Late Cretaceous, black shale turbidites were intermittently deposited at this site. The maximum abundance of the carbonaceous clay stone occurs interbedded with red and green claystone, and some silt and sand turbidites, in the Aptian-Albian interval. Sea level rose during the Albian, and as a consequence redeposition of terrigenous sediment waned, then ceased. The site then dropped below the calcite compensation depth. Less extensive terrigenous turbidite deposits are found associated with multicolored noncalcareous claystone that represents pelagic sedimentation during the Late Cretaceous. A turbidite containing dark green spherules of montmorillonite, and anomalously high concentrations of Ni, Co, and As, is interpreted to represent exotic sediment that was reworked from the Cretaceous/Tertiary (K/T) boundary sediment, based on its sedimentological and geochemical similarities to a biostratigraphically dated K/T boundary lamina cored at DSDP Hole 390B on the Blake Plateau. Late Paleocene to early middle Eocene pelagic claystone is disconformably overlain by middle Miocene hemipelagic claystone. Turbiditic silts and clays accumulated at this site, followed by the development of the lower continental rise hills of the Hatteras Outer Ridge. This constructional feature formed from muddy contourites deposited from the Western Boundary Undercurrent. Terrigenous turbidites ponded landward of Site 603 and formed the adjacent continental rise terrace.

Late Aptian to Recent Sedimentological History of the Lower Continental Rise off New Jersey, Deep Sea Drilling Project Site 603