![Hadi Fares on Twitter: "In the north of Spain for @NASAAstrobio summer school this week. On a field trip to Zumaia, we got to see the Cretaceous–Paleogene (K-Pg or K-T) boundary, and Hadi Fares on Twitter: "In the north of Spain for @NASAAstrobio summer school this week. On a field trip to Zumaia, we got to see the Cretaceous–Paleogene (K-Pg or K-T) boundary, and](https://pbs.twimg.com/media/EAKcxfWXoAUVuy3.jpg:large)
Hadi Fares on Twitter: "In the north of Spain for @NASAAstrobio summer school this week. On a field trip to Zumaia, we got to see the Cretaceous–Paleogene (K-Pg or K-T) boundary, and
![Measured section of the Cretaceous-Tertiary (K-T) boundary at Shell... | Download Scientific Diagram Measured section of the Cretaceous-Tertiary (K-T) boundary at Shell... | Download Scientific Diagram](https://www.researchgate.net/publication/288287337/figure/fig2/AS:320000234672129@1453305409599/Measured-section-of-the-Cretaceous-Tertiary-K-T-boundary-at-Shell-Creek-Wilcox-County.png)
Measured section of the Cretaceous-Tertiary (K-T) boundary at Shell... | Download Scientific Diagram
![Fossil Crates 🦖🦕 on X: "White layer contains a massive spike of #iridium, an element that comes almost exclusively from rocks from outer space. Layer below is #Cretaceous Period, time of the # Fossil Crates 🦖🦕 on X: "White layer contains a massive spike of #iridium, an element that comes almost exclusively from rocks from outer space. Layer below is #Cretaceous Period, time of the #](https://pbs.twimg.com/media/FNvu4GaVIAA34hp.jpg)
Fossil Crates 🦖🦕 on X: "White layer contains a massive spike of #iridium, an element that comes almost exclusively from rocks from outer space. Layer below is #Cretaceous Period, time of the #
![GEOLOGY: K-T boundary - K-T boundary Sussex locality, Wyoming, USA, Foto de Stock, Imagen Derechos Protegidos Pic. MEV-10860559 | agefotostock GEOLOGY: K-T boundary - K-T boundary Sussex locality, Wyoming, USA, Foto de Stock, Imagen Derechos Protegidos Pic. MEV-10860559 | agefotostock](https://previews.agefotostock.com/previewimage/medibigoff/4b346a7bbb27f1688c01f23ce82bc704/mev-10860559.jpg)
GEOLOGY: K-T boundary - K-T boundary Sussex locality, Wyoming, USA, Foto de Stock, Imagen Derechos Protegidos Pic. MEV-10860559 | agefotostock
![Multimedia Gallery - The K-Pg boundary as exposed along the side of Interstate 25 near Raton Pass in southern Colorado. | NSF - National Science Foundation Multimedia Gallery - The K-Pg boundary as exposed along the side of Interstate 25 near Raton Pass in southern Colorado. | NSF - National Science Foundation](https://www.nsf.gov/news/mmg/media/images/chicxulub2_h.jpg)
Multimedia Gallery - The K-Pg boundary as exposed along the side of Interstate 25 near Raton Pass in southern Colorado. | NSF - National Science Foundation
![15. KT boundary at Contessa (Italy), the Ir profile shown on the right... | Download Scientific Diagram 15. KT boundary at Contessa (Italy), the Ir profile shown on the right... | Download Scientific Diagram](https://www.researchgate.net/publication/226321756/figure/fig15/AS:498080254357505@1495762994484/KT-boundary-at-Contessa-Italy-the-Ir-profile-shown-on-the-right-side-of-the-figure.png)