Mastodawn

Earth’s 8th Continent Buried Under The Pacific Finally Mapped By Scientists [Zealandia / Te Riu-a-Māui - “Finally”? ~wink~]
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https://dailygalaxy.com/2025/10/earth-8th-continent-finally-mapped/ <-- shared (somewhat) technical article
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https://doi.org/10.1029/2023TC007961 <-- shared 2023 paper
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https://youtu.be/DDbc4K7bgnA?si=EZFmmPFybPLLyND7 <-- shared animation
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"KEY POINTS
• Basalts and pebbly to cobbly sandstones have been dredged from the Fairway Ridge, Coral Sea
• Dating of the rocks and interpretation of magnetic anomalies allow mapping of major geological units across North Zealandia
• This work completes offshore reconnaissance geological mapping of the entire 5 million square km Zealandia continent…”
#geology #doggerland #Zealandia #TeRiuaMaui #godwana #godwanaland #cretaceous #mapping #geologicmapping #spatialanalysis #model #modeling #NewZealand #SouthPacific #continent #sampling #sediment #dredging #petrography #geochemistry #isotope #analyses #research #cenozoic #intraplate #platetectonics #tectonics #eocene #remotesensing #geophysics #geomagnetism

Dr Micha Campbell Mar 18, 2025

Travelling with samples always stresses me the heck out. Taking some thin sections abroad for a workshop, has anyone ever had a problem with taking them in carry on? Irrationally afraid security will question the glass.

#Geology #petrography #microscopy

John Faithfull 🌍🇪🇺🏴󠁧󠁢󠁳󠁣󠁴󠁿🧡✊🏻✊🏿Aug 9, 2024

A day late for this weeks #ThinSectionThursday, here's some more epidote, this time from highly altered basalt lavas high on Ben More in Mull, viewed under a polarizing microscope. The bright (pale greenish) crystals of epidote are intergrown with grey (clear) fibrous zeolite mineral. Field of view about 2mm wide. See Alt text for more info. #Geology #Microscopy #Mull #Petrography #Mineralogy

💧🌏 Greg Cocks Jul 9, 2024

Volcano-Formed Fossils Reveal Trilobites In Never-Before-Seen Detail
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https://newatlas.com/biology/trilobite-fossils-volcanic-ash/ <-- shared technical article
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https://doi.org/10.1126/science.adl4540 <-- shared paper
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[Palæontology was a ‘minor’ in my MSc (Geology) coursework, I have always had a fascination with it, and continue to follow it – and wonder…]
#geology #palæontology #paleontology #fossil #trilobite #marine #fossilrecord #Morocco #AtlasMountains #volcanic #pyroclastic #seafloor #ash #Cambrian #xray #microtomography #imaging #imagery #geochemistry #petrography #invertebrate

Volcano-formed fossils reveal trilobites in never-before-seen detail

Scientists have just revealed their findings on what are being described as the most pristine trilobite fossils ever found. The fossils, which show both hard exterior features and soft inner tissues, shed new light on the fascinating creatures.

New Atlas

Samuele Papeschi Jan 6, 2023

Yes, I am having lots of fun 😍

Carbonate mylonite in serpentinites of the Sanbagawa metamorphic belt, Japan

*don't have time to correct lightning/contrast of each individual image now

#microscopy #petrography #geology #stitching

Sarah Mazza Dec 2, 2022

Redo post, still learning how to use this site. #ThinSectionThursday #geology #volcano Here's a low quality phone picture of a clinopyroxene (blue mineral in cross polarized light) with a weird calcite inclusion in a #basalt (technically not a basalt due to low SiO2). This sample is one of many that has me pondering the timing of crystallization and eruption. #petrography #petrology #microscope

Sverre Christoffer Guldberg Dec 2, 2022

Just discovered Rachel Phillips' (GEO GIRL) lectures on youtube, and want to recommend them for everyone interested in #geology and #opticalmineralogy (or #petrography).

My head is spinning almost as much as my mortar samples when I try to handle them under the microscope, so it's nice to break things down and go back to the basics every now and then.

https://www.youtube.com/watch?v=rTI6KypQTJk

Optical Mineralogy Pt.1- Plane & Cross Polarized Light, Birefringence, Pleochroism, etc. | GEO GIRL

YouTube

Sverre Christoffer Guldberg Nov 23, 2022

Just spending November counting all the little bits in #medieval #limemortar from #Stavanger #Cathedral. There are a lot of them. #yolo #pointcounting #petrography #geology