Jump to content

Help With ID - Possible Coral or Sponge?


JennLRM

Recommended Posts

One of my finds from yesterday. Found it on the surface in a creek bed here in W KY. (That is 99% of my finds!) Apologies for not knowing the geology & time frame. Not quite sure how to go about figuring that out yet. Could this be a sponge or coral? It's about 12 cm long, 9 wide at the widest, & heavy, probably 2 lbs. at least.

20190909_060518.jpg

20190909_061126.jpg

20190909_055639.jpg

20190909_055653.jpg

20190909_055648.jpg

20190909_055953.jpg

20190909_060634.jpg

20190909_060658.jpg

Link to post
Share on other sites

An interesting rock.  I can see why it caught your eye.  I also believe that it is geological, not fossil.  I think it is some form of cryptocrystaline chalcedony such as chert (flint), jasper or possibly agate.  The last photo, I believe, shows some small quartz crystals a.k.a. druzy quartz.  As to the age of the formation, let me do a little work and get back to you soon.  AND - thanks for the photos.

  • I found this Informative 3
Link to post
Share on other sites
39 minutes ago, daves64 said:

Ironstone concretion? Could explain the oxide "rust" on the outside & the weight.

I did sort of wonder about that. It definitely looks like it has iron in it. Thanks!

  • I found this Informative 1
Link to post
Share on other sites
1 hour ago, fossil_sea_urchin said:

I'm not seeing any features that shout fossil, but I'm not an expert in this topic:unsure:

Thank you!

Link to post
Share on other sites
1 hour ago, JennLRM said:

not knowing the geology & time frame. Not quite sure how to go about figuring that out yet.

I think this might be a good basic geological map of Kentucky to start with.  It's fairly general, but much easier to read for a starting place.  Once you find this no longer detailed enough, do a web search on "kentucky geological map" and it will take you to USGS and Kentucky Geological Survey maps that go into more details and are interactive.  But for a good starting point:

 

http://www.uky.edu/KGS/geoky/

  • I found this Informative 1
Link to post
Share on other sites
20 minutes ago, grandpa said:

An interesting rock.  I can see why it caught your eye.  I also believe that it is geological, not fossil.  I think it is some form of cryptocrystaline chalcedony such as chert (flint), jasper or possibly agate.  The last photo, I believe, shows some small quartz crystals a.k.a. druzy quartz.  As to the age of the formation, let me do a little work and get back to you soon.  AND - thanks for the photos.

Wow, thank you so much! It seems to have a bit of everything thrown in there. I have found some iron concretions, some are the smooth purple-red type, (which I see people call Indian Paint Pots), and some are the ones that are blackish and have sort of popped"bubbles", which I see people confuse with meteorites. So this one will be an interesting addition!

Link to post
Share on other sites
1 minute ago, grandpa said:

I think this might be a good basic geological map of Kentucky to start with.  It's fairly general, but much easier to read for a starting place.  Once you find this no longer detailed enough, do a web search on "kentucky geological map" and it will take you to USGS and Kentucky Geological Survey maps that go into more details and are interactive.  But for a good starting point:

 

http://www.uky.edu/KGS/geoky/

Thank you! That site is a wealth of info. I can get lost in there like I have in here! I think sometimes I get too much info and my brain forgets the way to sort it. :D Appreciate you!

  • I found this Informative 1
Link to post
Share on other sites

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 account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Recently Browsing   0 members

    No registered users viewing this page.

×
×
  • Create New...