In this podcast episode, Dr. Jesse Reimink and Chris Bolhuis delve into part two of their discussion on Earth's oldest rocks, specifically the Acasta Gneiss. They explore the origin, complex history, and significance of these ancient rocks, including insights from Dr. Reimink's PhD research which suggests an Icelandic rather than subduction zone setting for their formation. The conversation covers the challenges of studying such remote and deformed rocks, the iterative process of geological fieldwork, and the ongoing debates about their exact ages. They also discuss the logistical difficulties of accessing the Acasta Gneiss and the commercialization of samples.

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Dive into the fascinating world of Mammoth Cave with Dr. Jesse Reimink and Chris Bolhuis in this episode of Planet Geo. From understanding the types of passageways formed by ancient underground rivers to exploring the intricate and beautiful cave decorations like stalactites, stalagmites, and flowstone, this episode provides a comprehensive and engaging look at one of the natural wonders of the world. Whether you’re preparing for a visit or just curious about subterranean geology, this in-depth discussion is sure to satisfy your curiosity.

Don't forget to check out the additional images and resources available on the Camp Geo app for a more visual experience.

Download the CampGeo app now at this link.

On the app you can get tons of free content, exclusive images, and access to our Geology of National Parks series.
You can also learn the basics of geology at the college level in our FREE CampGeo content series - get learning now!

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In this episode, Chris Bolhuis and Dr. Jesse Reimink dive into the complexities of Zircon grains from the Jack Hills conglomerate in Western Australia—some of the Earth's oldest fragments. They discuss the environmental conditions necessary for their formation and survival, the role of magma differentiation in creating intermediate to felsic rocks, and the geochemical analysis using oxygen and hafnium isotopes which indicate the presence of water on Earth's surface over 4 billion years ago. The episode also explores the scientific debates surrounding these ancient minerals and their implications for our understanding of early Earth's geological history.

Stay tuned for more information, and find this episode, along with the images, on our CampGeo app below!

Download the CampGeo app now at this link.

On the app you can get tons of free content, exclusive images, and access to our Geology of National Parks series.
You can also learn the basics of geology at the college level in our FREE CampGeo content series - get learning now!

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Instagram: @planetgeocast
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