Workshop & Fieldtrips
MODELLING AND MONITORING
When, where and why monitoring can be useful - case studies to identify mass movement preconditioning and triggering, quantify run-out distance and velocity, and determine impact forces on seafloor structures.
Practical analysis of repeat seafloor surveys to identify and characterise mass movements: Participants will learn how to generate difference of DEM maps in GIS and how to recognise the effect of slope failure and its runout on the seafloor from repeat seafloor surveys.
Overview of tools (established and emerging technologies) to make direct and indirect measurements of submarine mass movements.
Practical analysis of direct measurements of mass movements. The participants will have the
opportunity to analyse direct monitoring datasets of turbidity currents, including ADCP data (example in attached image) as well as how to analyse real-time open-access data provided by cabled observatories.
Overview of modelling techniques: A presentation will be followed by a practical demonstration of slope stability modelling to understand how real world measurements can be used to calibrate numerical models.
Mike Clare (National Oceanography Centre, Southampton)
Matthieu Cartigny (Durham University)
Bray to Greystones Cliff Walk -
Transect through Cambrian turbidites & slumps
The Cliff Walk from Bray to Greystones is one of Co Wicklow’s most popular attractions and within easy reach from Dublin. The coastal walk winds along the side of Bray Head and has some of the most stunning views of the East Coast. The Cliff Walk is about 7 km and suitable for all abilities.
The Bray Head Formation is exposed along the footpath comprising turbidites and slumps of late Lower to early Middle Cambrian age that have been subjected to polyphase deformation and complex faulting. This formation is the type location for Oldhamia ichnogenus.
The Cliff Walk follows the rail line that has been disrupted numerous times from recent rock falls and slope collapses.
Numerous types of seabirds and various types of wildflowers add to the natural beauty of the walk. We might be able to spot dolphins, black harbour porpoises and basking sharks swimming in the waters around the Cliff.
The walk finishes in Greystones, a beautiful seaside town of Co Wicklow with plenty to offer to the hungry and thirsty walkers.
Aggeliki Georgiopoulou (University of Brighton, School of Environment and Technology)
Mike Long (UCD School of Civil Engineering)
Co Clare Deep-water basin to Delta tops
The cliffs of the Atlantic coastline and outer Shannon estuary of south Co. Clare are remarkable for their world-class exposures of Upper Carboniferous deep water, slope and delta deposits. These include spectacular examples of the fabrics formed by deepwater fan lobes, channels, and soft sediment deformation. The high sea cliffs provide large 'reservoir-scale' slices through the various deposits. In addition in recent years this area of Co. Clare has also become a test area for high resolution sequence stratigraphy whose concepts have far-reaching applications in the exploration and exploitation of hydrocarbons while providing an understanding how offshore basins fill. UCD has led a series of behind-outrcrop drill sites over the past decade and a visitors’ field centre has now developed to house the cores and allow geologists to have access to it.
We will visit the field centre and the famous Ross Sandstone, the Ross Slump and the Gull Island slope mass movements. The trip will start on the southern tip of the Loop Head peninsula and end at the World Heritage sites of the Cliffs of Moher and the Burren.
Depart UCD by coach in the early afternoon of Wednesday the 24th June
Peter Haughton (UCD School of Earth Sciences)
Lawrence Amy (UCD School of Earth Sciences)
Clare et al., 2017, Near Surface Geophysics, 15, 427-444, doi: 10.3997/1873-0604.2017033