Graduate Thesis Or Dissertation

 

Sediment textures and internal structures : a comparison between central Oregon continental shelf sediments and adjacent coastal sediments Öffentlichkeit Deposited

Herunterladbarer Inhalt

PDF Herunterladen
https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/s7526f93s

Descriptions

Attribute NameValues
Creator
Abstract
  • A study of sedimentary structures and sediment texture of beach and continental shelf sediments provides a basis for the interpretation of the recent history of sedimentation on the Oregon continental shelf. The texture of various sediment types suggests that coastal rivers supply a considerable quantity of very fine sand in addition to modern mud to the continental shelf. Relict sediments remain uncovered on areas of the shelf not under the influence of major river runoff and are mixed or covered by modern mud and very fine sand where rivers influence shelf sedimentation. Primary sedimentary structures show that sands ranging from very fine to medium in mean grain size are capable of being moved at shelf water depths from at least 38 to 88 meters. No net transport of sand, however, can be determined from these structures. Organic structures apparently are controlled by water depth and/or grain size and sediment type which determine faunal composition and concentration. At mid-shelf depths fine sand cores are characterized by shell fragments, worm tubes, and worm trails. Beyond 100 meters water depth worm tubes were not found, but worm trails become abundant, and large burrows appear in the sediment.
Resource Type
Date Available
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Academic Affiliation
Non-Academic Affiliation
Subject
Urheberrechts-Erklärung
Publisher
Peer Reviewed
Language
Digitization Specifications
  • PDF derivative scanned at 300 ppi (256 B&W, 256 Grayscale), using Capture Perfect 3.0.82, on a Canon DR-9080C. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
Replaces
Additional Information
  • description.provenance : Made available in DSpace on 2010-04-20T19:25:03Z (GMT). No. of bitstreams: 1 RoushRobertCornelius1969.pdf: 4272755 bytes, checksum: abf13938e7bd536c332ff27d60fa6922 (MD5)
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2010-04-20T19:25:03Z (GMT) No. of bitstreams: 1 RoushRobertCornelius1969.pdf: 4272755 bytes, checksum: abf13938e7bd536c332ff27d60fa6922 (MD5)
  • description.provenance : Submitted by Digital Production (digitalproduc@gmail.com) on 2010-04-20T16:28:21Z No. of bitstreams: 1 RoushRobertCornelius1969.pdf: 4272755 bytes, checksum: abf13938e7bd536c332ff27d60fa6922 (MD5)
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2010-04-20T19:21:46Z (GMT) No. of bitstreams: 1 RoushRobertCornelius1969.pdf: 4272755 bytes, checksum: abf13938e7bd536c332ff27d60fa6922 (MD5)

Beziehungen

Parents:

This work has no parents.

In Collection:

Artikel