panamark
fully equipped rock polisher
Member since September 2012
Posts: 1,343
|
Post by panamark on Dec 12, 2012 23:19:22 GMT -5
Just finished my 2nd tumble and had a couple nice wood pieces. Kinda looks like an angry beaver! Can anyone tell me if the one on the bottom right here is a stromatolite? I am pretty sure the top right is coral. Thanks for looking! - Mark
|
|
The Dad_Ohs
fully equipped rock polisher
Take me to your Labradorite!!
Member since September 2012
Posts: 1,860
|
Post by The Dad_Ohs on Dec 12, 2012 23:55:07 GMT -5
not sure what they are, but they are pretty !!!
|
|
Sabre52
Cave Dweller
Me and my gal, Rosie
Member since August 2005
Posts: 20,466
|
Post by Sabre52 on Dec 13, 2012 9:45:38 GMT -5
Mark, All the specimens in the last pic are typical banded chert showing Liesgang lines caused by deposition of various layers of sediment when the chert was formed. I have a whole hilltop of that material by my house where Amerinds used to quarry the chert ( locally called flint but flint is from chalk and this comes from limestone) for tools....Mel
|
|
mjflinty
spending too much on rocks
Member since September 2011
Posts: 358
|
Post by mjflinty on Dec 13, 2012 10:13:50 GMT -5
I agree with Mel. The banded pieces in the last pic look like chert. Nice tumbles!
Michael
|
|
Fossilman
Cave Dweller
Member since January 2009
Posts: 20,687
|
Post by Fossilman on Dec 13, 2012 11:27:43 GMT -5
Awesome!
|
|
panamark
fully equipped rock polisher
Member since September 2012
Posts: 1,343
|
Post by panamark on Dec 14, 2012 0:22:45 GMT -5
Thanks for the ID guys! That banding looks so biological. It is neat. When I was in Glacier NP this summer, they have huge sheets of rock that still have the sand ripples on the surface from when it was the ocean floor. And this was at about 9,000 feet (currently). Geology is pretty awesome! And humbling!
Merry ChristMas and happy Holidays, Mark
|
|