Tasman Peninsula and Tertiary volcanics
1 February 2017
The igneous rock dolerite is prevalent throughout the island of Tasmania, and defines many of Tasmania’s iconic mountain scenery, for example the Tasman Peninsula and Mt Wellington. This rock correlates with similar formations in Antarctica and South Africa, which is evidence of continental breakup during, and after, the Jurassic period. The Wednesday field trip will visit the Tasman peninsula where visitors can see these outcrops. In addition, the field trip will include visits to the submarine basaltic volcanic deposits on the peninsula.
10:00am Depart Hobart
11:15am Explore the Unzoo Devil Park and lunch (at own cost/arrangement)
2:15pm 2 ½ hour Eco cruise exploring the coastline between port Arthur, Lime Bay and Dunalley
4:45pm Board bus at Dunalley
5:30pm Return to Hobart
Cape Grim, NW Tasmania – a world class example of submarine basaltic intraplate volcanism.
4 – 7 February 2017
Field Trip Leaders: Professors Jocelyn McPhie and Jodi Fox, University of Tasmania
Cape Grim in far north western Tasmania, Australia, was the site of extensive intraplate basaltic volcanism during the Cenozoic. The submarine basalitic succession is exceptionally well preserved and exposed in rock platforms and steep coastal cliffs. Field trip participants will have the opportunity to examine eruption-fed density current deposits, world class exposures of pillow lavas and pillow breccias, with much debate of eruption and depositional processes and timing relationships. Participants will need to walk between 2-4 km over sometimes steep terrain and will need to bring appropriate clothing and walking boots.
This field trip will depart from Hobart and travel by bus to the northwest of Tasmania. The bus will return to Hobart on the final day with the potential to drop participants at the Burnie airport on the way, if prior arrangements have been made. The field trip will be led by Professor Jocelyn McPhie (University of Tasmania) and Jodi Fox (Graduate Student, University of Tasmania) and will be limited to 8-10 participants.
Read more about this field trip including information about transportation, accommodations, and fees.
Understanding the effects of environment on volcanic eruption styles and deposit types: comparing subaerial and subaqueous volcanics of the Late Devonian Boyd Volcanic Province, southeastern New South Wales.
5 – 7 February 2017
Field Trip Leader: Professor Ray Cas, Monash University, University of Tasmania
Understanding the effects of environment on volcanic eruption styles and deposit types, remains an important focus in research, particularly in the subaqueous volcanism realm. This 3-day field trip will focus on excellent coastal outcrops of the Late Devonian Boyd Volcanic Complex on the south coast of New South Wales, which preserve original depositional textures very well. On Day 1 nearly continuous exposure through a subaerial succession of rhyolitic, basaltic and andesitic pyroclastic and coherent volcanics, and intercalated sedimentary rocks, will allow discussion on the evolution of this continental rift succession. Days 2 and 3 will focus on the subaqueous equivalents of the Boyd Complex, which are dominated by lavas, syn-depositional and late intrusions, hyaloclastites, peperites, local dome-top pyroclastic tuff cone sequences, and ambient subaqueous sedimentary rocks, which help constrain the paleo-environment in which volcanism occurred.
Discussion will focus on the factors that caused the differences in processes and deposit types. Participants will need to be able to climb around coastal cliffs and headlands, the weather will be hot (summer), but beautiful coastal scenery and opportunities for an end of day swim will compensate. Read more about this field trip including information about transportation, accommodations, and fees.