Peter Burgess
@geopeteal.bsky.social
340 followers 51 following 27 posts
Sedimentary geology teacher and researcher, fan of science, cats and a dog called Ada, rocks, novels, good films, and bad jokes, but especially coding nerdy numerical models
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geopeteal.bsky.social
Intriguing cross-cultural fact; British (pictured) versus US hash brown divergence. Think I prefer US version - better for soaking up egg and bean juice
geopeteal.bsky.social
Spontaneous spectacular floor find in the Newfield Inn, Seathwaite, Cumbria U.K. A laminated layer-cake of loveliness from the nearby Ordovician Seathwaite Fell Sandstone Formation. Toeset for scale
geopeteal.bsky.social
Exactly, Nefyn, Llyn Peninsula. And beach pebbles are from late Pleistocene fluvioglacial strata so a good regional sample
geopeteal.bsky.social
Best guess IDs: Bottom row probs granodiorite and porphyritic andesite. Middle row Carboniferous Limestone with coral, perhaps Siphonodendron, Lithostrotion etc, and Ordovician mudstone with thin turbidites. Top left felsic mylonite, top right right probs mafic mylonite
geopeteal.bsky.social
You have to love a pebbly beach, but especially one with a great range of igneous, sedimentary, and metamorphic rocks 😍
Six pebbles from Nefyn Beach, two igneous, two sedimentary and two metamorphic
geopeteal.bsky.social
A mylonite beach pebble, a 600 My old microcosm of plate tectonics
geopeteal.bsky.social
A little bit of sheared and folded Neoproterozoic schist from Anglesey, Wales, a great place to understand how complex orogeny can be
geopeteal.bsky.social
It’s a good example of problems arising from presenting useful-but-dumb algorithms as intelligent when they are very definitely not
geopeteal.bsky.social
Here’s a motivational limerick I created for reluctant stereonet users
geopeteal.bsky.social
Apparent cyclicity in strata, and the process of determining if it really is ordered-cyclical or just randomly repetitive, is one of my favourite things. This example is Pennsylvanian deltaic? strata at Amroth, South Wales, with logging Liverpool University students for scale
geopeteal.bsky.social
Indeed, different kind of plate boundary in the two locations, but squishing is still squishing 😉
geopeteal.bsky.social
Too cool to be gneiss, this site is strat-tastic 😉
geopeteal.bsky.social
Because you cannot beat a good fold 😍 especially examples like this that show complex 3D geometry
Folded upper Carboniferous strata
geopeteal.bsky.social
Wall of the week; crinoids! And possibly stylolites dissolving them. Beautiful 😍
geopeteal.bsky.social
Deepest winter sunshine
geopeteal.bsky.social
The coral kerbstones of Amsterdam
geopeteal.bsky.social
A marbleously metamorphic Wall of the Week, Dam Square, Amsterdam
geopeteal.bsky.social
A few days post SEPM research conference to revisit some classic cratonic stratigraphy in a breathtakingly beautiful location 😍
geopeteal.bsky.social
Clunky code is fine of course, whatever works, means-to-an-end etc, but there are few things more satisfying than elegantly efficient code 🤓 Mostly as an aspiration however 😉
geopeteal.bsky.social
Jurassic water park?
geopeteal.bsky.social
Interested in how autogenic processes can make an allogenic input signal indistinguishable in submarine fan strata? Details in a new open-access EPSL paper here authors.elsevier.com/sd/article/S...
geopeteal.bsky.social
Any idea what that would look like when “deposited”?
geopeteal.bsky.social
Very well deserved 👏
geopeteal.bsky.social
I think you just succinctly summarised most social media 😉