Dr. Evan J. Gowan

@evangowan.bsky.social

I am a climate scientist, focused on paleoclimate, sea level change and the evolution of Quaternary glaciations. I reconstruct ice sheets using glacial isostatic adjustment and ice sheet modelling. In Japan but have been all over the place. 🇨🇦🇯🇵🇦🇺🇩🇪🇸🇪

Conventional wisdom for using corals as a paleo sea level indicator says that corals must live below the low tide level. This tidal pool, which has a sill above low tide, seems to break this rule!

A tidal pool with some Porites and Acropora corals in it.The sill of the tidal pool. You can see the ocean about 10 m away, and the sill is clearly above the water level.

It is probably going to be a while before I can make it back to Kumamoto after the earthquake earlier this week, but my wife sent me some pictures of our apartment. There is a big crack on the wall, but inside the only important thing that broke was the ANU mug I got when I handed in my PHD thesis.

A grey coloured brick wall with a big crack running diagonally through it.A broken cup that says "Australian National University".

Hello friends. I'm starting a new job today reporting for @nature.com on all things climate and Earth science, energy, and beyond.🌍Please get in touch if you're a researcher/gov staffer/startup with results/projects that deserve attention--or are facing problems we should know about. Contact in bio.

This poor guy had a meteorite crash through his house (luckily not hurt!), and it turned out to be a very rare type of meteorite. I wondered why the person was not thanked in the acknowledgements before I realized he was a coauthor on the paper. www.science.org/doi/10.1126/...

Meteor over New York City: Brines in a primitive CM asteroid

A sonic boom that shook New York City announced the fall of a meteorite that preserved the briny subsurface of an alien world.

science.org

Any paleontologists out there that has advice on how one identifies the species of a fossil? I am looking at everything from microfossils (foraminifera), molluscs and corals. Is there a manual that teaches how to do this effectively? I am but a mere modeller!

Anyone have experience extracting microfossils out of limestone? I read that using acetic acid on crushed limestone is the way to go. I have never done this before, but am looking to learn! The limestone I am looking at is not super lithified (it is Late Pleistocene) and in theory is mostly forams.

US Geological Survey releases data from optically stimulated luminescence (OSL) dating supporting a *radically* older chronology for the Hot Springs, South Dakota Mammoth Site. It's not 23,000-42,000 years old it's likely *130,000 to 255,000 years old*.

Luminescence Data for the Mammoth Site, Black Hills, South Dakota 2016-19

The ~21 m deep Mammoth Site (MS) bone bed site at Hot Springs, South Dakota, provides a unique opportunity to reconstruct paleoenvironmental conditions on the northern Great Plains of the United State...

usgs.gov

I have to say, the increasing presence of Cloudflare bot blocking this year is making the usage of the Internet increasingly frustrating. I shouldn't need to email a website administrator to be able to access a website! There has to be a better way of stopping the bots than using Cloudflare.

A notice on a website stating "Sorry, you have been blocked".

I am finding out that there are a lot of old journals in France (for instance, published before 1990) where there is hardly any record of them online, let alone scans. Where are you, "Revue de géomorphologie dynamique" and "Photo Interprétation"?