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- On Cu – The Finale:
- James Zehner: Christensen received a lump sum payment of US$75 and also lowers the tensile strength of the... (26 days 5 hours ago)
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Author Archives: Metageologist
From Erratics to an erratic
Having found my feet here, Chris @highlyallochthonous has kindly given me a space of my own on all-geo.org. I’ve a stack of posts ready to go, so posting will be less erratic. Hop on over and have a look. At … Continue reading
Categories: Uncategorized
Accretionary wedge #35 – Porphyroblast
I like long words (I might even say I was egregiously polysyllabic in my discourse) and when Accretionary Wedge #35 asked me for my favourite geological word I knew it had to be one of those compound names based on … Continue reading
Categories: Rocks & minerals
Chalk is weird
Sometimes you live with something and regard it as normal, dull, quotidian, jejune, blah or maybe just meh. Then one day you suddenly get a moment of clarity and realise that actually, it is really weird. Subtly weird perhaps, but … Continue reading
Categories: Rocks & minerals, Uncategorized
Impact and Geology: spherules rule
One of the most striking changes in Earth Science in the last 20 years has been the way meteorite and associated impacts (or bolides and astroblemes, if you prefer) are viewed by Geologists. In the dark days of the 1990s … Continue reading
Categories: planets, Rocks & minerals
Impacts and Geology: deep peace?
Metamorphic rocks typically come from deep in the earth and form slowly. Simple physics shows that transferring heat into large volumes of rock (a key driver of many types of metamorphism) takes millions of years. Rocks that form the deep … Continue reading
Categories: planets, Rocks & minerals
Impacts and Geology: from lahar to suevite
As I’ve written before, the last 30 years has seen a big change in the way Geologists think about the Earth; this planet of ours does not sit in isolation in the Universe but is frequently hit and changed by meteorites … Continue reading
Categories: planets, Rocks & minerals
Meteorites and Geology: big holes in the ground
How many meteorite craters haven’t we discovered yet? Continue reading
Categories: planets