The Stratigraphic Evolution of a Submarine Channel: Linking Seafloor Dynamics to Depositional Products

Simple item page
dc.contributor.authorHubbard, Stephen M.en
dc.contributor.authorJobe, Zane R.en
dc.contributor.authorRomans, Brian W.en
dc.contributor.authorCovault, Jacob A.en
dc.contributor.authorSylvester, Zoltanen
dc.contributor.authorFildani, Andreaen
dc.contributor.departmentGeosciencesen
dc.date.accessioned2020-12-18T15:10:12Zen
dc.date.available2020-12-18T15:10:12Zen
dc.date.issued2020-07en
dc.description.abstractWe investigate the relationship between the cross-sectional geomorphic expression of a submarine channel as observed on the seafloor and the stratigraphic product of long-lived erosion, bypass, and sediment deposition. Specifically, by reconstructing the time-space evolution of an individual channel fill (i.e., channel element) exposed in outcrop, we establish a genetic link between thick-bedded channel-element-axis sandstone to thinly interbedded channel-element-margin deposits. Although the bounding surface between axis sandstone and margin thin beds is sharply defined, it is composed of a series of geomorphic surface segments of various ages; as such, the composite stratigraphic surface (similar to 17 m relief) was formed from numerous incision events that repeatedly sculpted the conduit. By demonstrating the origin of the stratigraphic surface, we conclude that geomorphic surfaces with 2-7 m of erosional relief were largely responsible for the observed intra-channel-element architecture (and ultimately, the composite 17-m-thick element). The widely documented channel element axis-to-margin architecture is a product of submarine-channel thalweg dynamics, primarily recording interactions between the seafloor and the basal high-concentration layers of channelized turbidity currents.en
dc.description.notesThis research was graciously supported by sponsors of the Chile Slope Systems Joint Industry Project Phases 1-2 (Anadarko, BG Group, BHP Billiton, BP, Chevron, CNOOC, ConocoPhillips, Equinor, Hess, Marathon, Repsol, and Shell). Discussions with scientists from various sponsors have significantly impacted our understanding of slope channel systems. Sebastian Kaempfe, Ben Daniels, and Aaron Reimchen assisted with the fieldwork. Bret Dixon, Morgan Sullivan, and an anonymous reviewer provided helpful input for which we are particularly grateful.en
dc.description.sponsorshipAnadarko; BG Group; BHP Billiton; BP; Chevron; CNOOC; ConocoPhillips; Equinor; Hess; Marathon; Repsol; ShellRoyal Dutch Shellen
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.2110/jsr.2020.36en
dc.identifier.eissn1938-3681en
dc.identifier.issn1527-1404en
dc.identifier.issue7en
dc.identifier.urihttp://hdl.handle.net/10919/101536en
dc.identifier.volume90en
dc.language.isoenen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.titleThe Stratigraphic Evolution of a Submarine Channel: Linking Seafloor Dynamics to Depositional Productsen
dc.title.serialJournal of Sedimentary Researchen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.dcmitypeStillImageen

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
i1527-1404-90-7-673.pdf
Size:
5.77 MB
Format:
Adobe Portable Document Format
Description:
Download

Collections

Scholarly Works, Geosciences