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Showing results for tags 'otago'.
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Why the Foulden Maar, New Zealand, fossil site is worth preserving
Oxytropidoceras posted a topic in Fossil News
Life in maars: why it’s worth protecting a spectacular fossil site NZ almost lost to commercial mining interests John G. Gordan and otehrs, The Conversation, July 20, 2023 Foulden Maar: Dunedin City Council saves fossil site from mining by buying land RNZ, February2, 2023 Saving Foulden Maar-GSNZ lnvolvement Daphne Lee, Bruce W Hayward and Jennifer Eccles GSNZ Geoheritage Subcommittee Bruce Hayward publications A book on this site is: Lee, D., Kaulfuss, U. and Conran, J., 2022. Fossil Treasures of Foulden Maar: A Window Into Miocene Zealandia. Otago University Press. Yours, Paul H.-
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Exploring the siltstones of the Manuherikia Group (NZ)
Osiris09 posted a topic in Fossil Hunting Trips
Currently away from home on a work trip but that has allowed me to explore the silt stone laid down by Lake Manuherikia in the Otago region of New Zealand. The period is early to mid Miocene (16-19 million years). I have spent the last couple of evenings searching sites for fossil leaves or anything else I can find. FYI the bottle cap is for scale. I have nothing else with me but I figure most bottle caps are the same the world over. The above is part of a large palm frond. Hyridella shells above in matrix. Below are an assortment of the other leaf fossils I collected. Hopefully I get to go out for a bit more fossicking before I head home at the end of the week. -
Hey guys. In NZ we have quite a few volcanoes, and luckily for me living in christchurch, the most recent eruption in the south island was about 20 mya. On the "vanished world" trail, there is a preserved basaltic volcanic dyke/sill that has been injected into the strata beneath an ancient lagoon. While I'm aware that these magmatic intrusions don't break the surface, there is a broad fossil horizon not far from the top most termination of the sill, with beautiful small spirulla (?) (Some kind of elongate fossil snail) preserved in the rock. I was wondering, that as I mentioned before that this fossil horizon is not too far from the intrusion, just how much heat or mineral replacement does it take for igneous rocks the the associated hydrothermal minerals to completely destroy/deform/disfigure fossils in these kinds of geologic environments? I have included a rough sketch. Like all great geologic exposures, it occurs at a public road cutting, to provide context.
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https://www.stuff.co.nz/science/101835425/.html
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- bird fossil
- otago
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