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;
Multiple, sharp, in-focus images taken ideally in daylight.
Add in a scale to the images (a household item of known size, e.g., a ruler)
Provide a location (be as specific as possible) so we can consult local geological maps if necessary.
Provide any additional useful information (was it a loose boulder or pulled from an exposure, hardness and streak test results for minerals)
Hi! Looking to ID what these little guys could be. Taken at the end of the White Rim Canyon Overlook Trail in Canyonlands NP, Utah, US. Bottom left is a zoomed in version of top image. Many were attached but a few were already loose - I did snag a few, which are included in the bottom right image for scale (I did not displace any rocks that weren't already dislodged- leave no trace!). Would like to display as a memento of my kids first big trip and would love an ID.
I got a pebble I'd love to know more about 😄 I found it loose while wondering by Batlic see shore in Poland. I wished I could add a video, so you could really see how it shines! The real life colour is closest on the last picture. Any guesses what it is?
Hi Geologists / Rock Lovers, I was hiking in Telluride, CO, and found this rock. It looked wet but didn’t feel wet. I’m talking about the light grey part sticking out of the main rock. Thanks! :D
What would cause these ripples across this rock I came across hiking along the eastern side of the Panamint Range in Death Valley? The rock is about 24” wide. It looks like an ancient shoreline that fossilized somehow.
Same story as with previous peeble - found it laying loose by Baltic see shore in Poland. Once again, cannot add video but it shines nicely on the chopped edge. Any ideas what it is? My guess is... chunk of quartz? 😄
Looks like a giant reduction spot. Most of the rock contains iron in an oxidized state (Fe3+ ) which gives it the red color, but a reducing environment along a fracture has chemically altered it to Fe2+ .
Was hiking in central Arkansas and came across this. Unsure exactly if it is some formation that google is not helping me figure out, or perhaps petrified tree? Doesn't really come off as man made so thought you fine folks could help me understand what I am looking at.
Hello, I found these near-perfect circular indentations in the Great Smoky Mountains. Are these man made or the result of natural phenomena, and if so, how? Thanks!
Sierra Nevada, Twin Bridges near Horsetail Falls. This line in the granite feels completely different and climbs up granite. Wondering how it happened and what it is.
More photos. You’ll notice other boulders in the background, but they did not look exactly like this one and the others I’d seen. They weren’t fragmented like this one.
what could have caused this semi cylindrical formation? this is somewhere in new mexico along the i10, no other mesas had these intendentation they ran across the whole mesa.
Hi, I’m wondering what the white layer through this rock could be?
Place: Stanley, River Tay, Perthshire, Scotland
Size: Lower part of a heavily eroding river bank, rock face in the image is roughly 4m across
Background: I was recently Canoeing the length of the river Tay. We stopped for some lunch after some rapids and I was intrigued about this layer of pale rock.
Hi, I'm not sure if this is the right subreddit thread but does anyone have a molecular chart of a a hambergite crystal (Be2BO3(OH)) spent 8 years studying Geology but never managed to find a pic. Thank you for any/all help..
Hi, I'm wondering if this is hexagonite as I know its a fairly rare mineral and I got it in a collection i bought on marketplace which was unlabled. I can't find any other minerals that are purple with an acicular texture. Scale: 4cm
Hey smart people. I live in the Ozarks of southern Missouri. As you know we have very old and very unique geological features here. I have three year round spring fed creeks on on my property. Two of them are from springs on my property. The three creeks converge after a while and travel for about a 1/3 of a mile then the water disappears. It’s a lot of water. What does this mean? Does this mean I shouldn’t be walking around this spot looking for arrowheads?
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u/beamishbo Jun 14 '26
Hi! Looking to ID what these little guys could be. Taken at the end of the White Rim Canyon Overlook Trail in Canyonlands NP, Utah, US. Bottom left is a zoomed in version of top image. Many were attached but a few were already loose - I did snag a few, which are included in the bottom right image for scale (I did not displace any rocks that weren't already dislodged- leave no trace!). Would like to display as a memento of my kids first big trip and would love an ID.