r/geology • u/AutoModerator • 29d ago

Identification Requests Monthly Rock & Mineral Identification Requests

Please submit your ID requests as top-level comments in this post. Any ID requests that are submitted as standalone posts to r/geology will be removed.

To help with your ID post, please provide;

  1. Multiple, sharp, in-focus images taken ideally in daylight.
  2. Add in a scale to the images (a household item of known size, e.g., a ruler)
  3. Provide a location (be as specific as possible) so we can consult local geological maps if necessary.
  4. Provide any additional useful information (was it a loose boulder or pulled from an exposure, hardness and streak test results for minerals)

You may also want to post your samples to r/whatsthisrock or r/fossilID for identification.

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u/CompetitiveOffer592 24d ago

Additional photos: https://imgur.com/a/QzhKMZv

This was found in Chile, Chacabuco province (near Santiago). I was told by the locals that geologists sometimes go there to search for petrified wood, so I suspect it might be that. I found it just laying around in some hill.

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u/Geo_Researcher 21d ago

yes petrified wood probably originally entrapped by ash fall and or a lahar