21. Determining geochemical threshold values from the Tellus data sets: the examples of zinc and iodine | Europeana
![Tellus on Twitter: "We are pleased to release new data from the Tellus Airborne Survey. The new magnetic, electromagnetic & radiometric data is released for two survey blocks; A8 (south Central) & Tellus on Twitter: "We are pleased to release new data from the Tellus Airborne Survey. The new magnetic, electromagnetic & radiometric data is released for two survey blocks; A8 (south Central) &](https://pbs.twimg.com/media/FPA2PgpWYAM9Xu_.jpg)
Tellus on Twitter: "We are pleased to release new data from the Tellus Airborne Survey. The new magnetic, electromagnetic & radiometric data is released for two survey blocks; A8 (south Central) &
![Tellus Border and West Stream Water Data Analysis and Interpretation – Useful Data for Irish River Conservation / Water Quality Tellus Border and West Stream Water Data Analysis and Interpretation – Useful Data for Irish River Conservation / Water Quality](https://i0.wp.com/www.gsi.ie/images/images/Tellus_WatersEDA_main_cover_800px.jpg?w=636&ssl=1)