@RjNol This is likely a concretion, not a geode. Below is an image demonstrating how they form from a paper on silica concretions with bitumen cores: https://t.co/4Gi94pJSEr Concretions actually seem to form over a period of months or years: https://t.co/0
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Generalized conditions of spherical carbonate concretion formation around decaying organic matter in early diagenesis | Scientific Reports https://t.co/ilhYRBf6QT
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@geology_johnson @FaithfullJohn I always defer to Jon Gluyas at @DurUniEarthSci when it comes to concretions, though I found this 2018 paper very interesting (https://t.co/QmoG0ju1w1). For the Jet Rock, I wonder how many different types of dead bodies (wit
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