Lynn (Gerilyn) Soreghan

Find me on @lsoreghan.bsky.social

And now for some inferred ice-crystal impressions... from perhaps a crisp winter morning roughly 295 million years ago (Usclas Formation, Massif Central, France). Published in doi.org/10.1130/G49011… #paleoweather #lagerstätte #scicomm #ice

@blepharopsis Aha-- like being finger-printed. All you need is a wee bit of dust.

@LSoreghan this mornings chicken footprints

Raindrop impressions-- a light sprinkling from perhaps a Tuesday afternoon, some 300 million years ago, give or take. From the Maroon loessite, Colorado. #loess #dust #raindrop #paleoweather

@Fuzzyraptor @astropierre Une bonne question

@astropierre @LSoreghan Mais y avait-il des larmes dans la pluie ?

Traces fossilisées de... gouttes de pluie tombée au sol il y a 300 millions d'années 🤩 © @LSoreghan

@Astro_Aure The sediment was once dust (loess)-- powder-like. So it can preserve fine detail. In this aspect, it is similar to volcanic ash. Over millions of years, and burial, it converted to siltstone, but held the imprints.

@LSoreghan Wow 🤯 How are raindrops printed in fossils like that ?!

@auroberix @astropierre La pluie tombait sur de la poussière (le loess), un sédiment poudreux qui préservait les gouttes. Puis, davantage de poussière se déposa et, après l'enfouissement et des millions d'années, la poussière (et les traces de gouttes de pluie) se transformèrent lentement en siltite.

@astropierre @LSoreghan Mais comment se fait il que les traces soient fossilisées alors que l'eau aurait dû ruisseller ? Ou alors la pierre est extra plate, l'eau est stagnante pendant très longtemps sans s'évaporer ? 🤔

@climate_ice stay tuned

@LSoreghan More #paleoweather please 🙏

@ellie_gbr Not that I'm aware-- what a cool idea!

@LSoreghan This is so cool!! Have people compared the drop size distributions from evidence like this to modern records?!

Still time to apply to these incredible curator/prof positions in Ornithology & Invertebrate Zoology! Review of applications begins on October 23

smithsonianmag.com/science-nature… #lynx #balkans #scicomm

In honor of Thin-Section Thursday, here is a really disrupted rock. Field of view ~10 mm on left and ~5 mm on right. Plane light. Black is hematite, the rest mostly quartz and very altered feldspar with a few mafics. The origin of the disruption remains under study.

To boldly go into the core lab in search of really old core... and discover some from an age when split infinitives were less acceptable.

Re-posting one of my favorite pics of small-scale eolian stratification (and translatent beneath the grain flows)

Here are four images that shows capitalisms immense failure to bring about environmental, economic & social wellbeing. 1. 6 of the 9 planetary boundaries have been crossed 2. Poverty is increasing 3. Inequality is getting worse 4. Hunger inflicts 1 in 10 people around the world

Your periodic reminder that less ice at the Arctic is consistent with a weaker jet stream that allows cold air to drift down into the Great Plains. The frigid temps you're experiencing happen BECAUSE of a warming planet, not in spite of it.

Yep, that’s ⁦@GovStitt⁩ for you.

Reminder: Not a single Congressional Republican voted for President Biden’s Inflation Reduction Act capping insulin costs at $35 a month for seniors on Medicare.

Polish artist Nespoon creates street art featuring lace patterns #WomensArt

An undercover sting operation has exposed a Saudi Arabian government plan to artificially raise global oil demand just days before climate crisis talks begin in the UAE, Channel 4 News can reveal.