@drjoshuashea.bsky.social
π§ͺ Geochemist & πͺ¨ Igneous Petrologist | Postdoc at Cambridge. I study how Earthβs mantle melts, moves, and shapes our planetβs volcanic history - and what that tells us about other worlds. ππͺ
Screenshot of parliamentary e-petition to βImprove Higher Degree by Research student conditionsβ.
βοΈEveryone sign this new petitionβοΈ
π www.aph.gov.au/e-petitions/...
PhD students shouldnβt be in poverty. Simple as that.
The Universities Accord said #RaiseTheStipend, but nothingβs happened.
Tell parliament you want action!
π’ And tell everyone you know in Oz to sign as wellβοΈ
These samples also give great context to a sample residing on my desk from Byrock, that I collected during my PhD. (5/5)
12.01.2024 15:16 β π 0 π 0 π¬ 0 π 0
Rummaging through samples in Sedgwick Museum here at Cambridge I found most of the original samples in storage! I have read each publication and carried out fieldwork at each site, so seeing these thin sections here helps bring home closer while postdoc-ing far away from Australia. (4/5)
12.01.2024 15:16 β π 1 π 1 π¬ 1 π 0Later, in August 1892 Stonier collected leucite bearing rocks south of El Capitan at Lake Cargelligo and reported it in 1883, along with other leucite-bearing rocks at Bygalorie and Harden. With the first detailed description of the Harden occurrence published by Harvey and Joplin (1940). (3/5)
12.01.2024 15:16 β π 0 π 0 π¬ 1 π 0
Although not the first, the first was slightly north to El Capitan at Byrock (1887), when published by David and Anderson (1889) it was accompanied by the first bulk analyses from both Byrock and El Capitan, showing geochemically the existence of ultrapotassic igneous rocks in Australia. (2/5)
12.01.2024 15:16 β π 1 π 0 π¬ 1 π 0
#earth-science #geoscience βοΈ
This is a thin section of a leucitite from the El Capitan volcanic centre in eastern Australia. This specific thin section is very special, since it was the second recorded occurrence of lucite in Australia! Here is a short story on some cool samples I found. (1/5)
Photo of hexagonal columns of basalt extending out into the sea at the Giant's Causeway, N Ireland. Credit: Elliot Carter
Hi Bluesky π we're the Volcanic and Magmatic Studies Group, a special interest group of the MinSoc and GeolSoc (@geolsoc.bsky.social). Follow us for updates on all things volcanic and magmatic! You can find more about what we do via the links to our website and other accounts here: linktr.ee/vmsg
29.12.2023 08:22 β π 49 π 15 π¬ 0 π 1
It has been a while since I worked on my fO2 calculator (available here fo2.rses.anu.edu.au), but now I have some available time to add fO2 for CO2-H2O mixtures, hopefully will finish early 2024. Hopefully will be super useful to the community!
27.11.2023 00:04 β π 5 π 2 π¬ 0 π 0
I've started visiting places on my UK geology checklist
04.11.2023 20:27 β π 40 π 2 π¬ 0 π 0
I'll always be excited seeing zoning, inclusions, twinning in large phenocrysts. An added bonus was using the feldspars to observe offset in granite plutons.
27.10.2023 19:39 β π 2 π 0 π¬ 0 π 0
An awesome couple of days checking out some metasomatised granites at Cligga Head, Cornwall
23.10.2023 16:38 β π 3 π 0 π¬ 0 π 0Thanks mate!
17.10.2023 13:19 β π 1 π 0 π¬ 0 π 0
