Search the Community
Showing results for tags 'vascular bundles'.
Found on surface in area with numerous crinoid stem sections. Stone appears to also have stem cross-section impressions. Friend notes this specimen does not have the five-lobed feature of crinoids. Western St. Louis County, Missouri. Near Rockwoods Reservation. Rocky clay soil is tens of meters deep with egg- to fist-size rounded stones throughout. Is this a cross-section or a negative impression? Vascular bundles? If not crinoid, what?
Here is a slice of petrified palmwood I found last weekend. I noted upon a close examination that the vascular bundles (the dots seen all over the surface) appear to have been distorted from a round shape to more of a half-moon shape, with the distorted side facing roughly 4 o'clock in most instances. I asked a friend of mine about this since his speciality is petrified wood, and was told such a thing was relatively common due to compression of the wood prior to fossilization. Does that sound right? Any paleo-botanists out there that can confirm what I've been told?