Submarine Landslides and Incised Canyons of the Southeast Queensland Continental Margin

2016 ◽  
pp. 125-134 ◽  
Author(s):  
Thomas Hubble ◽  
Jody Webster ◽  
Phyllis Yu ◽  
Melissa Fletcher ◽  
David Voelker ◽  
...  
Keyword(s):  
Continental Margin ◽  
Submarine Landslides ◽  
Southeast Queensland

scholarly journals Morphological Variability of Submarine Mass Movements in the Tectonically–Controlled Calabro–Tyrrhenian Continental Margin (Southern Italy)

Geosciences ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 43 ◽  
Author(s):  
Daniele Casalbore ◽  
Alessandro Bosman ◽  
David Casas ◽  
Francesco Chiocci ◽  
Eleonora Martorelli ◽  
...  
Keyword(s):  
High Resolution ◽  
Continental Margin ◽  
Large Scale ◽  
Southern Italy ◽  
Morphological Variability ◽  
Failure Behavior ◽  
Main Role ◽  
Submarine Landslides ◽  
Large Variability ◽  
Geomorphic Features

The analysis of high resolution morpho–bathymetric data on the Calabro Tyrrhenian continental margin (Southern Italy) enabled us to identify several morphological features originated by mass–wasting processes, including shallow gullies, shelf–indenting canyons and landslides. Specifically, we focus our attention on submarine landslides occurring from the coast down to −1700 m and affecting variable areas from thousands of square meters up to few tens of square kilometers. These landslides also show a large variability of geomorphic features which seems strictly related to the physiographic/morphological domains where the landslide formed. Tectonically–controlled scarps and canyon flanks are typically characterized by several coalescent and nested landslides, with diameters ranging from hundreds to a few thousands of meters. Canyon headwalls are commonly characterized by a cauliflower shape due to an array of small (diameters of tens of meters) and coalescent scars. In all these sectors, disintegrative–like landslides dominate and are generally characterized by a marked retrogressive evolution, as demonstrated by their morphology and comparison of repeated bathymetric surveys at the canyon headwall. Only in the lower part of tectonically–controlled scarps, a few cohesive–like and isolated landslides are present, indicating the main role of slope gradients and height drop in controlling the post–failure behavior of the mobilized material. Open slopes are generally characterized by large–scale (diameters of thousands of meters) and isolated scars, with associated landslide deposits. A peculiar case is represented by the Capo Vaticano Scar Complex that affected an area of about 18 km2 and is characterized by an impressive variability of landslide morphologies, varying also at short distance. The large extent and variability of such scar complex are thought to be associated with the occurrence of a mixed contouritic–turbidite system. By integrating the high–resolution morpho–bathymetric dataset with the results of previous studies, we discuss the main factors controlling the variability in size and morphology of submarine landslides developed in a tectonically–controlled setting and provide preliminary considerations on their potential geohazard in a densely populated coastal area.

Geophysical evidence and inferred triggering factors of submarine landslides on the western continental margin of the Ulleung Basin, East Sea

2016 ◽  
Vol 36 (6) ◽  
pp. 425-444 ◽  
Author(s):  
Deniz Cukur ◽  
Seong-Pil Kim ◽  
Gee-Soo Kong ◽  
Jang-Jun Bahk ◽  
Senay Horozal ◽  
...  
Keyword(s):  
Continental Margin ◽  
East Sea ◽  
Ulleung Basin ◽  
Submarine Landslides ◽  
Triggering Factors

scholarly journals Morphology of late Quaternary submarine landslides along the U.S. Atlantic continental margin

2009 ◽  
Vol 264 (1-2) ◽  
pp. 4-15 ◽  
Author(s):  
David C. Twichell ◽  
Jason D. Chaytor ◽  
Uri S. ten Brink ◽  
Brian Buczkowski
Keyword(s):  
Continental Margin ◽  
Late Quaternary ◽  
Submarine Landslides ◽  
The U.S

scholarly journals Mass wasting along the NW African continental margin

2018 ◽  
Vol 477 (1) ◽  
pp. 151-167 ◽  
Author(s):  
S. Krastel ◽  
W. Li ◽  
M. Urlaub ◽  
A. Georgiopoulou ◽  
R. B. Wynn ◽  
...  
Keyword(s):  
Continental Margin ◽  
Large Scale ◽  
Current Knowledge ◽  
Special Focus ◽  
Submarine Landslides ◽  
Mass Wasting ◽  
Recurrence Rates ◽  
Volcanic Debris ◽  
Rising Sea Level ◽  
Over Time

AbstractThe NW African continental margin is well known for the occurrence of large-scale but infrequent submarine landslides. The aim of this paper is to synthesize the current knowledge on submarine mass wasting off NW Africa with a special focus on the distribution and timing of large landslides. The described area reaches from southern Senegal to the Agadir Canyon. The largest landslides from south to north are the Dakar Slide, the Mauritania Slide, the Cap Blanc Slide, the Sahara Slide and the Agadir Slide. Volumes of individual slides reach several hundreds of cubic kilometres; run-outs are up to 900 km. In addition, giant volcanic debris avalanches are widespread on the flanks of the Canary Islands. All headwall areas are complex with clear indications of multiple failures. The most prominent similarity between all investigated landsides is the existence of widespread glide planes that follow the stratigraphy, which points to weak layers as most important preconditioning factor for the failures. Landslides with volumes larger than 100 m3 are close to being evenly distributed over time, contradicting previous suggestions that landslides off NW Africa occur at periods of low or rising sea level. The risk associated with the landslides off NW Africa, however, is relatively low due to their long recurrence rates.

scholarly journals Morphological Variability of Submarine Mass Movements in the Tectonically-Controlled Calabro-Tyrrhenian Continental Margin (Southern Italy)

2018 ◽  
Author(s):  
Daniele Casalbore ◽  
Alessandro Bosman ◽  
David Casas ◽  
Francesco Latino Chiocci ◽  
Eleonora Martorelli ◽  
...  
Keyword(s):  
Continental Margin ◽  
Southern Italy ◽  
Morphological Variability ◽  
Failure Behavior ◽  
Submarine Landslides ◽  
Large Variability ◽  
Bathymetric Data ◽  
Large Size ◽  
Geomorphic Features ◽  
Size And Morphology

The acquisition of high resolution morpho-bathymetric data on the Calabro Tyrrhenian continental margin (Southern Italy) enabled us to identify several mass-wasting processes, including shallow gullies, shelf-indenting canyons and landslides. In particular, we focus our attention on submarine landslides occurring from the coast down to -1700 m, with mobilized volumes ranging from some hundreds up to tens of millions of cubic meters. These landslides also show a large variability of geomorphic features in the headwall, translational and toe domain. Based on their morphology and distribution, four main classes of coastal/submarine landslides have been recognized: a) rocky coastal/shallow-water failures characterized by large hummocky deposits offshore; b) large-size and isolated scars with associated landslide deposits, mostly occurring on open slope environment and lower part of tectonically-controlled escarpments; c) a linear array of coalescent and nested landslide scars occurring in the upper part of tectonically-controlled escarpments and canyon flanks; d) a cauliflower array of small and coalescent scars occurring in canyon headwall.  The latter two classes of landslides are also characterized by a marked retrogressive evolution and their landslide deposits are generally not recognizable on the morpho-bathymetric data. By integrating the morpho-bathymetric dataset with the results of previous studies, we also discuss the main factors controlling the variability in size and morphology of these submarine landslides to provide insights on their failure and post-failure behavior.

scholarly journals Submarine Landslides on the Upper Southeast Australian Passive Continental Margin – Preliminary Findings

2011 ◽  
pp. 55-66 ◽  
Author(s):  
Samantha Clarke ◽  
Thomas Hubble ◽  
David Airey ◽  
Phyllis Yu ◽  
Ron Boyd ◽  
...  
Keyword(s):  
Continental Margin ◽  
Passive Continental Margin ◽  
Submarine Landslides

The Archaeology of the Peel Island Lazaret: Part 1: Survey

2002 ◽  
Vol 13 ◽  
pp. 31 ◽  
Author(s):  
Jonathan Prangnell
Keyword(s):  
Conservation Planning ◽  
Archaeological Survey ◽  
Landscape Modification ◽  
Moreton Bay ◽  
Nineteenth And Twentieth Centuries ◽  
Southeast Queensland

<p>An archaeological survey on Peel Island in Moreton Bay, southeast Queensland, was conducted to assist the conservation planning for the Peel Island Lazaret (PIL), one of a number of institutions housed on the island during the nineteenth and twentieth centuries. The survey revealed a patterning of artefacts across the island as well as landscape modification related to its Aboriginal and European institutional uses.</p>

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