Kerstin Braun

[🐢🐢🐢John Green🐢🐢🐢 @johngreen]

I HAVE RETURNED TO MAIN because I am FURIOUS that @JNJGlobalHealth is preventing millions from accessing life-saving treatment with bedaquiline, thereby costing innumerable lives and increasing the global risk of multidrug-resistant tuberculosis. https://t.co/AbTdNzC1Sm

[Laia @vedereka]

81 co-authors, countless emails and telecons, 353,976 d18O and 200,623 d13C measurements, 691 speleothem records, 294 cave systems, >5,000 revised metada entries, 2,138 new age-depth models.... Next milestone: (post-covid) around the world trip to get to know y'all in person 🤗

[Kerstin Braun @kbmaronski]

I wrote a feature for @AGU_Eos about the Paleo-Agulhas Plain. If you are into Surf and Turf, this is the place to be, at least during intermediate glacials.

[AGU's Eos @AGU_Eos]

Southern South Africa is well known for its scenic coastline of rugged cliffs and sandy beaches. The present-day coastline is also dotted with sites documenting 200,000 years of human activity.

By @kbmaronski at @HumanOriginsASU

https://t.co/VhN1foZ2XJ

[Kerstin Braun @kbmaronski]

@SaveYourCaves @SFMBreitenbach @cavesandclimate @baker_and @Geo_Juv @SISAL_wg @wegeochem @WorryTimez @StalagNick @IsotopeDude one issue is that we need to understand the internal stratigraphy of the sample in order to be able to use the pruxy data. At 2cm this is often not possible and the cores break into many pieces during drilling. I am happy to hear suggestions, though.

[Kerstin Braun @kbmaronski]

Speleopeople, since we are having such a great conversation starting @baker_and s question here is one: what kind of saws do you use/recommend for cutting smaller/fragile samples? @SFMBreitenbach @Geo_Juv @SISAL_wg @cavesandclimate @wegeochem @WorryTimez @StalagNick @IsotopeDude

[Kerstin Braun @kbmaronski]

@SaveYourCaves @SFMBreitenbach @cavesandclimate @baker_and @Geo_Juv @SISAL_wg @wegeochem @WorryTimez @StalagNick @IsotopeDude I first try to get an idea of the cave morphology, different growth phases that are present etc, then take a 2cm diameter core for dating and then only take a 5cm core for proxy analyses when the age is in the range I am interested in.

[Kerstin Braun @kbmaronski]

@structuregeo @IsotopeDude @baker_and @SFMBreitenbach @Geo_Juv @SISAL_wg @cavesandclimate @wegeochem @WorryTimez @StalagNick great, we have something similar to this. I was just wondering if people had different solutions out there. Thanks!

[Kerstin Braun @kbmaronski]

@SFMBreitenbach @baker_and @Geo_Juv @SISAL_wg @cavesandclimate @wegeochem @WorryTimez @StalagNick @IsotopeDude thanks!
we already have a tile saw similar to the one Jon mentioned. Ours has the blade above the sample table, which allows us to cut larger diameter samples. So maybe I will keep using this one and invest in a good blade.

[Kerstin Braun @kbmaronski]

@cavesandclimate @baker_and @SFMBreitenbach @Geo_Juv @SISAL_wg @wegeochem @WorryTimez @StalagNick @IsotopeDude We currently have a tile saw probably similar to what you describe, but really cheap. The Geological Survey of Israel had some big table saws. I think one if them might have been a band saw.

[Kerstin Braun @kbmaronski]

@SFMBreitenbach @baker_and @Geo_Juv @SISAL_wg @cavesandclimate @wegeochem @WorryTimez @StalagNick @IsotopeDude I usually have cores of 5 cm diameter and max length of 30-35 cm and want to cut slabs of them. I also have a few stalagmites of similar dimensions.

[Kerstin Braun @kbmaronski]

@SFMBreitenbach @baker_and @Geo_Juv @ChrisATX @SISAL_wg @wegeochem @cavesandclimate @pucicu @WorryTimez if getting it out is a problem, maybe trying a silicone baking form or a springform pan could work in the next round

[Kerstin Braun @kbmaronski]

@SFMBreitenbach @Geo_Juv @baker_and @ChrisATX @SISAL_wg @wegeochem @cavesandclimate @speleoian Awesome, that was part of my question. Thanks

[Kerstin Braun @kbmaronski]

@IsotopeDude @baker_and @SISAL_wg @wegeochem @cavesandclimate That is right, I am just wondering if the resin could cause contamination of U-Th ages or trace element and stable isotope analyses.

[Kerstin Braun @kbmaronski]

@IsotopeDude @baker_and @SISAL_wg @wegeochem @cavesandclimate Jon, were you still able to analyze isotopes and/or trace elements on those afterwards? Is there a way to avoid contamination? I have a slab of a sample (~15mm thick) that I want to slice further and am trying to figure out a safe way to do it.

[Kerstin Braun @kbmaronski]

Aparently I am one of the "most dedicated Republicans in the country"??? What did I do wrong? #help #howdidthishappen #takemeoffthatlist

[Simon Monk ⚡️☀️💨🔋🚘 @SimonMonk]

My sons HSC design project: sort plastics for recycling using the existing barcode already on the item. Battery powered laser scanner & arduino. (pretty cool!)

[BlackInGeoscience @BlkinGeoscience]

Welcome to #BlackinGeoscienceWeek! We're so excited that the week is finally here!

Today we begin our week celebrating #DiversityinBiG. Let's start by introducing yourself, so we can show the world how diverse we are as #BlackGeoscientists #BiGRollcall

[Kerstin Braun @kbmaronski]

@DrEvanGowan I thought about this when I saw the paper this morning. Looking forward to see the paper.
Humans as a species certainly had boats by then. They were in Australia by 48 ka, which would have required boats, but a lack of tree up north would be a problem.

[Kerstin Braun @kbmaronski]

@Geo_Juv "It is possible to commit no mistakes and still lose. That is not a weakness. That is life." Jean-Luc Picard Next Generation Season 2 Episode 21