casi Posted February 5 Share Posted February 5 So I went hiking one day and I have come across this rock and others like it. I have no idea what kind of rock this is. Do you have a guess of what it can be? Link to comment Share on other sites More sharing options...
Geologyhound Posted February 5 Share Posted February 5 Where did you find it? Also, is that texture throughout the whole rock or is it just a surface coat? One of the pictures makes it appear like it might just be an orange crust on the surface of the rock. If the surface texture is throughout the whole rock, then I would say it’s a pisolitic limestone (pictures attached). If it is just a surface crust, then it could be a dried out algal slime, or possibly (depending on where you found it), a caliche crust. 1 Link to comment Share on other sites More sharing options...
Geologyhound Posted February 5 Share Posted February 5 Hmm, I posted another update to this earlier today, but it seems to have been lost. So, if that earlier post pops up then this is a duplicate. In that case, my apologies. Anyway, upon looking at the rock closer, it looks like the “grains” are not round. A better option may be a fossilized algal mat (stromatolite). Imagine a cut or broken section of the attached picture. Does that look about right? 1 Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now