Wednesday 13th of November in Dublin & Wednesday 20th November in Cork
CLIMATE CHANGE: THE CURRANT BUN* AND OTHER PLAYERS
An informal talk with facts, falsehoods, speculations and uncertainties
The Intergovernmental Panel on Climate Change (IPCC) asserts that humans are causing global temperature to rise by increasing atmospheric carbon dioxide (CO2) through the use of fossil fuels. The Environmental Protection Agency (EPA) reiterates this IPCC teaching. Should we believe the IPCC or not? As a geologist I believe that climate is always changing naturally, influenced by various causes. During the last 4 years, as time permitted, I felt the need to reach my own conclusions on climate change, once referred to as global warming and now as extreme climate. Although my ongoing reading has led me to the Sun, other factors have also become apparent. The Sun and other climate drivers are either ignored or dismissed by the IPCC as insignificant.
Led by Dr David Jordon & George Reynolds
The Cloghleagh iron-manganese deposit was a trial mine – only an adit and a few filled-in trial shafts remain – and it is set apart from Ballycorus lead mines. It is located in the Upper Liffey pluton, a subsidiary to the Leinster batholith which was described by Prof. James Brindley. The mineralisation is hypogenetic, iron and manganese oxides in the matrix of an explosion breccia; the responsible fault plane from which can be seen as well as examples of goethite, a hydrated iron oxide and psilomelane and hollandite (K-Ba varieties of pyrolusite -manganese dioxide). The mine was worked from 1862 to 1868 and parts of a stone crushing wheel which was never assembled can be seen. The fault zone is dated at 12 million years, and claims to be Ireland’s “youngest” fault.
This field trip is primarily aimed at beginners, amateurs and others who might not have encountered granite before or the geology of South Dublin(/North Wicklow). It might serve as an introduction to Peadar McArdle’s field trip to the Blackstairs granite this coming May. My trip will visit just two locations to examine the basics of what granite is, the rocks that are associated with granite proper (aplites, pegmatites, quartz veins), and a local sample of a rock type that the Leinster granite itself intrudes (andalusite schist). By good fortune, both stops are ‘beauty spots’, so if the weather is kind, everyone should bring their cameras. Both locations require only short walks on paved paths. However, the paths are somewhat steepish in parts. Bring appropriate footwear and wet weather gear, just in case. Finally, because parking at the first stop in Killiney can be quite problematic at weekends, I am starting the field trip at the early time of 9:30 am. Other than that, the day’s timings will be relatively relaxed. Anyway, the first stop at White Rock can quickly fill up with nudists, and we want to get there first!
Lecturer: Mairéad Nic Bhloscaidh (University of Ulster)
Tea/Coffee from 7:00pm
Lecture commencing at 7:30pm
Venue: Geological Survey of Ireland, Beggars Bush, Haddington Road, Dublin 4
Technologies such as Hydraulic Fracturing or Carbon Capture and Storage, which involve the injection of fluid into the earth’s crust, have been associated with increased rates of seismicity. One issue of concern in assessing the risks associated with these technologies is the possible magnitude of the induced earthquakes; although most of the observed earthquakes are small, there are cases where fluid injection has been linked to the triggering of large, potentially damaging events, for example the 2011 M5.7 Oklahoma event, thought to be the result of injection of waste water from fracking. The energy released in an induced earthquake is not limited to the energy introduced into the crust by the injection. Rather, the injection acts as a trigger for the release of energy that is already stored. The magnitude of the induced earthquake depends on properties of the existing faults such as size, location, state of stress and frictional behaviour. As with tectonic earthquakes, most of this information is not known: it is currently difficult, therefore, to provide meaningful constraints on the maximum probable magnitude at an injection site. Improving the quality of hazard assessment from induced seismicity relies, therefore, not only on advances in modelling fluid induced stress changes, but also developing physics based, stochastic models to explore uncertainties associated with unknown details of existing fault networks. (more…)
Dr Ian Sanders of TCD has published an excellent booklet to help geography teachers explain the basic principles of Geology to their students.
In conjunction with this booklet, Dr. Sanders has rock sets of six common Irish rocks on offer to geography teachers. He can be contacted at – ISANDERS@tcd.ie.
Dr Patrick Wyse Jackson, Curator of Trinity’s Geology Museum, along with Dr Matthew Parkes of the National Museum, and with assistance from the Ulster Museum, have together set up a website to assist teachers of geography / geology in Ireland: www.geoschol.com
Geoschol.com offers a number of very informative wall posters, such as:
Wicklow really did have a gold rush back in 1795 and the recently published book ‘Gold Frenzy’ describes its history as well as the source of its fabulous gold nuggets. By the mid-1930s the award of State mining facilities at Goldmine River led to Dáil charges of corruption and lease trafficking (an impossible event today, surely!), but an Oireachtas Committee dealt surprisingly efficiently with the matter.
Dr Peadar McArdle is the recently retired Director of the Geological Survey of Ireland, and his talk will detail the origin and history of the Goldmine River gold deposits.
Date: Wednesday April 03, 2013
Venue: Minerva Suite
6.00pm – 8.00pm
Free of charge and open to all. Advance booking is essential.
Event Website: http://events.rds.ie/?eventID=21129
Organiser’s Contact Details:
RDS – Library Desk
Royal Dublin Society
Tel: + 353 1 240 7254
Workshops to examine role of plate tectonics, volcanic activity and earthquakes in shaping the Burren
The Burren, County Clare, IRELAND – An introductory course examining how plate tectonics, volcanic activity and earthquakes have shaped the landscape of the Burren Region will take place during March and April.
Run by the Burren and Cliffs of Moher Geopark and the Burren Outdoor Education Centre, “Stone, Water and Ice: Understanding the Burren Landscape” will feature lectures and outdoor excursions focusing on how the world-famous karst landscape and underground features of the Burren were formed.
The 5-week introductory course will commence on March 7th and will continue each Thursday evening during March from 7.30 to 9.30pm, culminating with a guest lecture on April 4th.
Opening: 5th April Closing: 10th May
Opening: 29th March Closing: 3rd May
Last year, on Saturday, 1st of December 2012, the IGA were joined by RTÉ News to report on our gold panning adventures in the Dodder river. Gerry Stanley, of the Geological Society of Ireland, led the way on the IGAs return to the Dodder in search of Gold. See below for the full report.