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G-Probe spring round postponed

Owing to the Covid-19 pandemic, G-Probe operations have been interrupted. Regrettably, we will be unable to send out the spring round samples for the forseeable future.

We will inform you of our revised scheduling for this year when the situation becomes clear.


The G-Probe report for round Round 23, involving the Norite glass test material NoSM-1G, is now available for download.


For enquiries about:

The test material and the G-Probe programme, contact Dieter Garbe-Schönberg: dieter.garbe-schoenberg@ifg.uni-kiel.de​

The delivery of test materials, contact Charles Gowing: cjbg@bgs.ac.uk

The website and reporting results online, contact Peter Webb: gprobe.iag@gmail.com

Payments and subscriptions, contact Chris Jackson: iag-treasurer@virginmedia.com


The G-Probe proficiency testing programme is provided by the International Association of Geoanalysts (IAG): www.geoanalyst.org/

The IAG gratefully acknowledges the major role that Steve Wilson (USGS) has played in initiating, organising and developing the G-Probe programme over many years.

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