The consolidation-permeability characteristics and index properties of seven sediment samples from Deep Sea Drill- ing Project Leg 93, Sites 603 and 604, were studied in an effort to gain an understanding of the processes acting on con- tourite sediments. Three hemipelagic silty clay contourite sediment samples collected with the hydraulic piston corer (HPC) from depths between 47 and 83 m were found to be overconsolidated. X-radiographs indicated these samples to be relatively undisturbed. Coring and degassing disturbance has produced an apparent state of underconsolid ation for one near-surface and two deeper samples from Site 603. Permeability values ranged between 2.7 × 10~ 7 and 6.4 × I0" 8 cm/s. The one sample tested from Site 604 at a depth of 4.42 m was found to be overconsolidated. The permeabil- ity value for this sample, 1.4 × 10~ 4 cm/s, was considerably higher than those measured at Site 603. The presence of near-surface Pleistocene sediment with virtually no Holocene sediment cover at both sites suggests sporadic winnowing by fluctuating currents and/or erosion of modern sediment overburden, resulting in overconsolida ted sediments.

Research Article| July 01, 1986 Active sand transport along a fjord-bottom channel, Bute Inlet, British Columbia David B. Prior; David B. Prior 1Coastal Studies Institute, Louisiana State University, Baton Rouge, Louisiana 70803 Search for other works by this author on: GSW Google Scholar Brian D. Bornhold; Brian D. Bornhold 2Geological Survey of Canada, Pacific Geoscience Centre, Sidney, British Columbia V8L 4B2, Canada Search for other works by this author on: GSW Google Scholar Mark W. Johns Mark W. Johns 3Texas A&M University, College Station, Texas 77843 Search for other works by this author on: GSW Google Scholar Author and Article Information David B. Prior 1Coastal Studies Institute, Louisiana State University, Baton Rouge, Louisiana 70803 Brian D. Bornhold 2Geological Survey of Canada, Pacific Geoscience Centre, Sidney, British Columbia V8L 4B2, Canada Mark W. Johns 3Texas A&M University, College Station, Texas 77843 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1986) 14 (7): 581–584. https://doi.org/10.1130/0091-7613(1986)14<581:ASTAAF>2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation David B. Prior, Brian D. Bornhold, Mark W. Johns; Active sand transport along a fjord-bottom channel, Bute Inlet, British Columbia. Geology 1986;; 14 (7): 581–584. doi: https://doi.org/10.1130/0091-7613(1986)14<581:ASTAAF>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract An underwater channel system is incised in the Holocene fjord basin sediments of Bute Inlet, British Columbia. High-resolution side-scan sonar swaths and seismic profiles reveal two channels within a zone of extensive rotational sliding on the slopes of a fjord-head delta. The channels coalesce into a single sinuous channel that extends 14 km downfjord on a 0.9° slope where it splits into two distributaries, which continue another 18 km, ending within stacked depositional lobes. Piston cores show sands in the channels and lobes in contrast to deep-water silty clays in the basin floor. The sea-floor features and sediment distributions result from active, highly mobile slide-generated sediment flows, which transport sands via the channels from the delta to the fjord basin. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.

Abstract Geotechnical characteristics of the sediments from a known submarine slope failure at Kitimat Arm, British Columbia, are related to the results of geological and geophysical surveys. Site geology and morphology of the fjord, evaluated from high‐resolution side‐scan sonar and subbottom profile data, show the effects of at least three separate instability events. The geotechnical properties of the sediments involved in the instability processes have been analyzed from piston cores and cores collected from a manned submersible. Four distinct instability mechanisms are identified within the fjord, including failure of the fjord wall and delta‐front sediments, initiation of movement of fjord‐bottom clays, long‐distance translational movement on the low‐angle fjord floor, and block gliding at the downslope front of the landslide. Using post‐failure geometries and geotechnical data, factors such as coastal construction, tidally induced drawdown, and undrained loading are evaluated as possible initiators...

Research Article| June 01, 1985 DSDP Site 603: First deep (>1000-m) penetration of the continental rise along the passive margin of eastern North America Jan E. Van Hinte; Jan E. Van Hinte 1Co-Chief Scientist, Vrije Universiteit, Amsterdam, Netherlands Search for other works by this author on: GSW Google Scholar Sherwood W. Wise, Jr.; Sherwood W. Wise, Jr. 2Co-Chief Scientist, Department of Geology, Florida State University, Tallahassee, Florida 32306 Search for other works by this author on: GSW Google Scholar Brian N. M. Biart; Brian N. M. Biart 3Open University, Milton Keynes, MK7 6AA United Kingdom Search for other works by this author on: GSW Google Scholar J. Mitchener Covington; J. Mitchener Covington 4Florida State University, Tallahassee, Florida 32306 Search for other works by this author on: GSW Google Scholar Dean A. Dunn; Dean A. Dunn 5University of Southern Mississippi, Hattiesburg, Mississippi 39401 Search for other works by this author on: GSW Google Scholar Janet A. Haggerty; Janet A. Haggerty 6University of Tulsa, Tulsa, Oklahoma 74104 Search for other works by this author on: GSW Google Scholar Mark W. Johns; Mark W. Johns 7Texas A&M University, College Station, Texas 77843 Search for other works by this author on: GSW Google Scholar Philip A. Meyers; Philip A. Meyers 8University of Michigan, Ann Arbor, Michigan 48109 Search for other works by this author on: GSW Google Scholar Michel R. Moullade; Michel R. Moullade 9Université de Nice, 06034 Nice Cedex, France Search for other works by this author on: GSW Google Scholar Jay P. Muza; Jay P. Muza 10Florida State University, Tallahassee, Florida 32306 Search for other works by this author on: GSW Google Scholar James G. Ogg; James G. Ogg 11University of California, San Diego, California 92093 Search for other works by this author on: GSW Google Scholar Makoto Okamura; Makoto Okamura 12Kochi University, Kochi City, Japan Search for other works by this author on: GSW Google Scholar Massimo Sarti; Massimo Sarti 13Universita di Ferrara, 44100 Ferrara, Italy Search for other works by this author on: GSW Google Scholar Ulrich von Rad Ulrich von Rad 14Bundesanstalt für Geowissenschaften und Rohstoffe, Hannover 51, Federal Republic of Germany Search for other works by this author on: GSW Google Scholar Geology (1985) 13 (6): 392–396. https://doi.org/10.1130/0091-7613(1985)13<392:DSFDMP>2.0.CO;2 Article history first online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Jan E. Van Hinte, Sherwood W. Wise, Brian N. M. Biart, J. Mitchener Covington, Dean A. Dunn, Janet A. Haggerty, Mark W. Johns, Philip A. Meyers, Michel R. Moullade, Jay P. Muza, James G. Ogg, Makoto Okamura, Massimo Sarti, Ulrich von Rad; DSDP Site 603: First deep (>1000-m) penetration of the continental rise along the passive margin of eastern North America. Geology 1985;; 13 (6): 392–396. doi: https://doi.org/10.1130/0091-7613(1985)13<392:DSFDMP>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Drilling at Deep Sea Drilling Project Site 603 has provided the first deep (>1000-m) penetration of strata beneath the continental rise off the Atlantic margin of North America. Nearly continuously cored through 1585 m of section down to Berriasian pelagic limestones, the site 435 km (270 mi) east of Cape Hatteras intersected an extensive Lower Cretaceous deep-sea fan complex, which provides new information on the petroleum potential of the continental rise. Hauterivian to early Aptian in age, this 208-m interval of interbedded limestones, sand, and black shale turbidites begs the existence of any post-Valanginian reefs along the Baltimore Canyon Trough. Less extensive terrigenous turbidites were encountered higher in the section up to the Cretaceous/Tertiary boundary, which is marked by a current-laminated sand rich in dark spherules. Pelagic early Paleogene clays are disconformably overlain by Miocene pelagic mud. Turbiditic silts and clays began to accumulate rapidly at this site during the middle Miocene, leading to deposition of muddy contourites that formed the Lower Continental Rise Hills of the Hatteras Outer Ridge as sand turbidites were ponded concurrently on its landward side. The section at Site 603 confirms the concept that eustatic and other large-scale events subdivide Earth history into distinct chapters allowing the correlation of deep-sea seismic sequence boundaries with continental shelf and margin unconformities. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.

Research Article| June 01, 1985 Deep-sea drilling on the upper continental rise off New Jersey, DSDP Sites 604 and 605 Jan E. Van Hinte; Jan E. Van Hinte 1Co-Chief Scientist, Vrije Universiteit, Amsterdam, Netherlands Search for other works by this author on: GSW Google Scholar Sherwood W. Wise, Jr.; Sherwood W. Wise, Jr. 2Co-Chief Scientist, Department of Geology, Florida State University, Tallahassee, Florida 32306 Search for other works by this author on: GSW Google Scholar Brian N. M. Biart; Brian N. M. Biart 3Open University, Milton Keynes, MK7 6AA United Kingdom Search for other works by this author on: GSW Google Scholar J. Mitchener Covington; J. Mitchener Covington 4Florida State University, Tallahassee, Florida 32306 Search for other works by this author on: GSW Google Scholar Dean A. Dunn; Dean A. Dunn 5University of Southern Mississippi, Hattiesburg, Mississippi 39401 Search for other works by this author on: GSW Google Scholar Janet A. Haggerty; Janet A. Haggerty 6University of Tulsa, Tulsa, Oklahoma 74104 Search for other works by this author on: GSW Google Scholar Mark W. Johns; Mark W. Johns 7Texas A&M University, College Station, Texas 77843 Search for other works by this author on: GSW Google Scholar Philip A. Meyers; Philip A. Meyers 8University of Michigan, Ann Arbor, Michigan 48109 Search for other works by this author on: GSW Google Scholar Michel R. Moullade; Michel R. Moullade 9Université de Nice, 06034 Nice Cedex, France Search for other works by this author on: GSW Google Scholar Jay P. Muza; Jay P. Muza 10Florida State University, Tallahassee, Florida 32306 Search for other works by this author on: GSW Google Scholar James G. Ogg; James G. Ogg 11University of California, San Diego, California 92093 Search for other works by this author on: GSW Google Scholar Makoto Okamura; Makoto Okamura 12Kochi University, Kochi City, Japan Search for other works by this author on: GSW Google Scholar Massimo Sarti; Massimo Sarti 13Universita di Ferrara, 44100 Ferrara, Italy Search for other works by this author on: GSW Google Scholar Ulrich von Rad Ulrich von Rad 14Bundesanstalt für Geowissenschaften und Rohstoffe, Hannover 51, Federal Republic of Germany Search for other works by this author on: GSW Google Scholar Author and Article Information Jan E. Van Hinte 1Co-Chief Scientist, Vrije Universiteit, Amsterdam, Netherlands Sherwood W. Wise, Jr. 2Co-Chief Scientist, Department of Geology, Florida State University, Tallahassee, Florida 32306 Brian N. M. Biart 3Open University, Milton Keynes, MK7 6AA United Kingdom J. Mitchener Covington 4Florida State University, Tallahassee, Florida 32306 Dean A. Dunn 5University of Southern Mississippi, Hattiesburg, Mississippi 39401 Janet A. Haggerty 6University of Tulsa, Tulsa, Oklahoma 74104 Mark W. Johns 7Texas A&M University, College Station, Texas 77843 Philip A. Meyers 8University of Michigan, Ann Arbor, Michigan 48109 Michel R. Moullade 9Université de Nice, 06034 Nice Cedex, France Jay P. Muza 10Florida State University, Tallahassee, Florida 32306 James G. Ogg 11University of California, San Diego, California 92093 Makoto Okamura 12Kochi University, Kochi City, Japan Massimo Sarti 13Universita di Ferrara, 44100 Ferrara, Italy Ulrich von Rad 14Bundesanstalt für Geowissenschaften und Rohstoffe, Hannover 51, Federal Republic of Germany Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1985) 13 (6): 397–400. https://doi.org/10.1130/0091-7613(1985)13<397:DDOTUC>2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Jan E. Van Hinte, Sherwood W. Wise, Brian N. M. Biart, J. Mitchener Covington, Dean A. Dunn, Janet A. Haggerty, Mark W. Johns, Philip A. Meyers, Michel R. Moullade, Jay P. Muza, James G. Ogg, Makoto Okamura, Massimo Sarti, Ulrich von Rad; Deep-sea drilling on the upper continental rise off New Jersey, DSDP Sites 604 and 605. Geology 1985;; 13 (6): 397–400. doi: https://doi.org/10.1130/0091-7613(1985)13<397:DDOTUC>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Deep Sea Drilling Project Sites 604 and 60S on the upper continental rise are the first of a series of cored holes along the "New Jersey transect" which, when completed, will provide the first comprehensive dipwise suite of drill holes across a passive margin from the coastal plain to the abyssal plain. Our drilling results document the age of important seismic sequence boundaries and allow their correlation with wells on the continental shelf and slope as well as with the regional oceanic seismic stratigraphy.Hole 605,156 km (97 mi) southeast of Atlantic City, New Jersey, and drilled 816.7 m down to mid-Maestrichtian limestones, penetrated a near-complete Cretaceous/Tertiary boundary section overlain by a 200-m expanded Paleocene sequence. Unusually high amounts of terrigenous silts and glauconite are present at the boundary and immediately above. Among the several hypotheses discussed, we suggest that the terrigenous silts and glauconite may represent a high-energy event such as a tsunami caused by a Cretaceous/Tertiary impact.Site 604, 5 km (3 mi) seaward of Site 605, was terminated in upper Miocene glauconitic sands and debris flows at 294.5 m by unstable hole conditions. These sediments contain shelf-derived gravels and exotic blocks of Eocene chalk (up to 50 cm across) eroded from bedrock that is today widely exposed on the adjacent slope. Our drilling results show that denudation of the Eocene units was not limited to the Oligocene Au erosional event, but that major loss occurred during late Miocene and later glacial sea-level lowstands. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.

An example of a recently active delta-front fjord landslide has been extensively studied using side-scan sonar, subbottom profiler, piston coring, and submersible observations. The resulting sea-floor morphology and sediments have many characteristics similar to terrestrial debris flows. Analysis of cores, including physical properties and X-ray radiographs, is correlated with survey data to interpret the debris flow deformational processes and to categorize the debris flow sediments. Deformational mechanisms include delta-front sliding, downslope loading and mixing, translational shearing and remolding, and distal-lobe block gliding over weak, high-water-content fjord bottom sediments. A major part of the debris flow apparently involves remolding and deformation of fjord bottom sediments. These mechanisms result in distinctive sediment properties and structures. The data and interpretations provide a basis for comparison with other marine sedimentary sequences where slope instability processes are suspected.