Hugo van Schrojenstein Lantman

@HugoLantman
101 Followers
93 Following
45 Posts
Postdoc at The Njord Centre (UiO) in Oslo, working on microstructures and residual stresses in lower-crustal fault zones. Also interested in metamorphism, fluids, subduction zone processes.
#ThinSectionThursday Skeletal olivine phenocrysts ๐Ÿ˜ ๐Ÿฆ‹ in quenched, fine-grained, black magnesium-rich picrite, forming thin dykes and veins in peridotites of the Central Intrusion in Rum. This magma had around 20%MgO, and was around 1500 degrees C when intruded - MUCH hotter than normal basalt magmas. Hunterian museum specimen: http://collections.gla.ac.uk/#/details/ecatalogue/32999
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I've been having some fun scanning full sections with polarizing sheets. The cross-polarized light scan of this folded serpentinite really brings out the gorgeous structures.

#ThinSectionThursday #Geology

Taraaa! ๐ŸŽบ๐Ÿ•บ๐Ÿ’ƒ First home-made thin section in Mull ๐ŸŽ‰ This is a quartz-feldspar-biotite-garnet metasediment - it is the bedrock to our house ๐Ÿ˜Š๐Ÿค“ Not perfect - slight wedging at edges, but I'm very happy with this slow and arduous first home attempt. Respect ๐Ÿ‘ to the skilled thin-section makers who mass-produce much better examples in labs over the world. #ThinSectionMonday #Geology #Metamorphic #Mull #MyHandHurts

So, new instance, new introduction!

My name is Chris Rowan.

I am an Earth Scientist in the process of transitioning out of 10 years as a university professor and 20 years as a researcher. Still trying to work out what comes next, but whatever that is I will continue to think and talk about plate tectonics, earthquakes, and other cool geo-things.

#geology #EarthScience #tectonics #earthquakes

There was a 4.8-5.3 magnitude #earthquake in Croatia, I saw some paper basket wobbling at work, but didnโ€™t otherwise feel it https://www.emsc-csem.org/Earthquake/earthquake.php?id=1224457
Earthquake, Magnitude 5.5 - OTOK KRK, CROATIA - 2023 February 16, 09:47:45 UTC

Magnitude: M 5.5, Region: OTOK KRK, CROATIA, Date time: 2023-02-16 09:47:45.4 UTC, Location: 44.99 N ; 14.67 E, Depth: 2 km.

EMSC-CSEM
Sorting sand on Ardalanish beach, Mull. Pink (garnet-rich) and black (magnetite-rich) heavy-mineral concentrations produced by natural "panning" in a wee stream on the beach. I never tire of seeing this process on beaches. ๐Ÿ˜Š ๐Ÿ˜‹ ๐Ÿฅฐ
Great afternoon walk at Carsaig today. Tide was out so lots of shore exposed. Nice little ammonites, belemnites and gryphaea by the hundreds. Plus loads of neat dykes cutting across the shore sediments.

Today, #TEKTONIKA #DOAJ has published its first paper ! ๐ŸŽ‰

20th to 21st Century Relative Sea and Land Level Changes in Northern #California - by J. Patton @earthjay et al.

https://tektonika.online/index.php/home/article/view/6

Toot it, share it, read it FREE !

#openscience #openaccess #tectonics #eustasy #SeaLevel

20th to 21st Century Relative Sea and Land Level Changes in Northern California | ฯ„eฮบฯ„oniฮบa

Throwback to last summer, when I saw gigantic plagioclase crystals like this one on the Lofoten archipelago. Can't wait to go back into the field!

#Introduction

I haven't done this before, but I feel the time has come.

I am also a #Twitter refugee and, before that, someone that has grew tired of the tiktokization of social networks.

If you like #geology #science and #fieldwork I will use mastodon to post all my geoscience-related photos, fresh from the field and the microscope!

No big words or complicated descriptions, as I will use mastodon mostly to relax and take a breath.

Sorry for the long post, here's a free #rock !