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Quartz-filled geode, shown from inside (top) and outside (bottom) A geode (/ ˈ dʒ iː. oʊ d /; from Ancient Greek γεώδης (geṓdēs) 'earthlike') is a geological secondary formation within sedimentary and volcanic rocks. Geodes are hollow, vaguely spherical rocks, in which masses of mineral matter
A geode is a simple term for a rock with a hollow in it, often with crystal formation/growth. A thunderegg on the other hand is a specific geological structure. A thunderegg may be referred to as a geode if it has a hollow in it, but not all geodes are thundereggs because there are many different ways for a hollow to form.
Coso artifact in 2018. The Coso artifact is an object falsely claimed by its discoverers to be a spark plug encased in a geode.Discovered on February 13, 1961, by Wallace Lane, Virginia Maxey, and Mike Mikesell while they were prospecting for geodes near the town of Olancha, California, it has long been claimed as an example of an out-of-place artifact. [1]
Enhydro geode, found in Brazil. Enhydro agates are nodules, agates, or geodes with water trapped inside its cavity. [1] Enhydros are closely related to fluid inclusions, but are composed of chalcedony. The formation of enhydros is still an ongoing process, with specimens dated back to the Eocene Epoch. [2]
Cavers inside the geode. The Pulpí Geode (Spanish: Geoda de Pulpí) is a giant geode found in the Mina Rica mine in Spain near the town of Pulpí (Province of Almería) on December 31st, 1999, [1] [2] by Adrian and Efren Cuesta, two young and intrepid mineralogists from Cantabria. This geode is one of the largest documented geodes in the world ...
Review: "Got this for my 7 and 14 year old and they had so much fun busting them open and seeing the beautiful geodes inside. They passed one out to each of the family bc there were so many ...
Geodes are a vug-formed rock, although that term is usually reserved for more rounded crystal-lined cavities in sedimentary rocks and ancient lavas. [2] The word vug was introduced to the English language by Cornish miners, from the days when Cornwall was a major supplier of tin. [3] The Cornish word was vooga, which meant "cave". [3]
Greg Jardin’s It’s What’s Inside is a twisted dark comedy about a group of college friends who reunite the night before one of their number’s weddings to drink, reminisce, and experiment ...