David Arpad
Research intrest: palaeoichnology, neoichnology, taphonomy.
Bioerosion
ichnology of fossil and modern rocky shores
bioerosion on and in the tests of Paleogene and Neogene age Molluscs
plant-animal interactions; borings and feeding traces in fossil leaves and silicified wood remains, bioerosion structures in fossil bones
Bioturbation
bioturbation structures of different Palaeozoic, Mesozoic and Neogene formations of Hungary.
Teaching experience:
Mineralogy and Petrology, Physical Geography, Basics of Geology, Sedimentology, Palaeoecology, Oceanography, Volcanology, (BSc)
Basics of Palaeontology, Systematic Palaeontology (BSc)
Engineering and Environmental Geology, The Lithosphere and the Soil as Power Equipment and Hazard, Introduction into Monument Protection, The Use of Geothermal Energy (MSc)
Special Topics of Palaeontology (PhD)
Further interests and experiences
Examination of building stones of different castles and fortresses of the Carpathian Basin
Examination of gravestones of ancient and modern cemeteries
Organizing and leading of mineral and fossil collecting field trips in Hungary.
(Do not hesitate to ask me about any above mentioned topics, please!)
Bioerosion
ichnology of fossil and modern rocky shores
bioerosion on and in the tests of Paleogene and Neogene age Molluscs
plant-animal interactions; borings and feeding traces in fossil leaves and silicified wood remains, bioerosion structures in fossil bones
Bioturbation
bioturbation structures of different Palaeozoic, Mesozoic and Neogene formations of Hungary.
Teaching experience:
Mineralogy and Petrology, Physical Geography, Basics of Geology, Sedimentology, Palaeoecology, Oceanography, Volcanology, (BSc)
Basics of Palaeontology, Systematic Palaeontology (BSc)
Engineering and Environmental Geology, The Lithosphere and the Soil as Power Equipment and Hazard, Introduction into Monument Protection, The Use of Geothermal Energy (MSc)
Special Topics of Palaeontology (PhD)
Further interests and experiences
Examination of building stones of different castles and fortresses of the Carpathian Basin
Examination of gravestones of ancient and modern cemeteries
Organizing and leading of mineral and fossil collecting field trips in Hungary.
(Do not hesitate to ask me about any above mentioned topics, please!)
less
InterestsView All (32)
Uploads
Papers
Drill core sediments have been obtained from the lake bed in the 1970’s and 1980’s by the Bureau of Mineral Resources and the Australian National University (Truswell 1984, Singh & Geissler 1985, Jacobson Jankowski and Abell 1991, etc.). From those drill cores, it was recognized that the Lake George basin contains the longest known continuous continental Quaternary sedimentary record in Australia and one of the longest in the World – an up to 165 metres sequence of sediments deposited over the last 4 million years (McEwan Mason 1991). The sedimentary sequence therefore spans the late Pliocene and the entire Quaternary Period (Pleistocene and Holocene Epochs).
Endorheic basins are greatly affected by climate change. Pollen analyses by Singh & Geissler (1985) indicate fluctuating vegetation changes during the last 780,000 years (since the Matuyama/Brunhes paleomagnetic reversal), from subalpine grass/herbfields during glacial periods to sclerophyll woodland during interglacial periods.
In 2015, the Australian National University obtained a new 77 m sediment core from the lake bed (GG-01), which has fewer weathering intervals and better pollen preservation than previous cores. The base of the core has an estimated age of ~2.2-2.5 million years.
As part of the multi-disciplinary study of the core, trace fossil analysis have been carried out, based on high resolution photographs. This is the first time ever that this method has been applied to the study of Lake George sediments. Over thirty trace fossils have been found. In agreement with previous models resulting mainly from pollen analysis, the trace fossils indicate alternation of lacustrine and terrestrial (lake margin and flood-plain) environments.
Characteristic lacustrine trace fosils are: Planolites isp., Palaeophycus isp., and four different types of burrows of invertebrate animals, referring to littoral and lake bottom environments (Uchman et al. 2007). Terrestrial trace fossils are earthworm burrows, ant nest remains, and dominantly root traces. Five types have been distinguished, indicating shrubs and grassy vegetation. The observed trace fossils belong to the Mermia and the Scoyenia ichnofacies (Buatois and Mangano 2004).
Drill core sediments were obtained from the lake bed in the 1970’s and 1980’s by the Bureau of Mineral Resources and the Australian National University (Truswell 1984; Singh & Geissler 1985; Jacobson, Jankowski and Abell 1991; etc.). From those drill cores, it was recognized that the Lake George basin contains the longest known continuous continental Quaternary sedimentary record in Australia and one of the longest in the World – an up to 165 metres deep sequence of sediments deposited over the last 4 million years, based on magnetostratigraphy (McEwan Mason1991). The sedimentary sequence therefore spans the late Pliocene and the entire Quaternary Period (Pleistocene and Holocene Epochs).
Endorheic basins are greatly affected by climate change. Pollen analyses by Singh & Geissler (1985) indicate fluctuating vegetation changes from subalpine grass/herbfields during glacial periods to sclerophyll woodland during interglacial periods during the last 780,000 years (since the Matuyama/Brunhes paleomagnetic reversal).
During 2015, the Australian National University obtained a new 77 m sediment core from the lake bed, which has fewer weathering intervals and better pollen preservation than previous cores. The base of the core has an estimated age of ~2.2-2.5 million years.
As part of the multi-disciplinary study of the core, trace fossil analysis have been carried out, based on high resolution photographs of the 77 m core. This method has never been applied to the study of Lake George sediments before. There are thirty-two core sections, where trace fossils have been observed. These can be arranged into thirteen different groups. In agreement with previous models resulting mainly from pollen analysis, the trace fossils indicate alternation of lacustrine (within lacustrine lake bottom and shallow lake) and terrestrial (within terrestrial lake margin and flood-plain) environments.
Characteristic lacustrine trace fosils are: Planolites isp., Palaeophycus isp., and four different types of burrows of invertebrate animals, referring to littoral and lake bottom environments. Terrestrial trace fossils are eartworm burrows, ant nest remains, crayfish burrows and dominantly root traces. Five types of root traces have been distinguished, indicating shrubs and grassy vegetation. The observed trace fossils belong to the Mermia and the Scoyenia ichnofacies. The water level in the lake bed, indicated by trace fossils, follows a similar trend to that is indicated by the high resolution sedimentary log, obtained from the same drill hole.