By request based on my last posting, here are some of the petrified wood that I picked up at my friend's property in Northeastern Douglas County in Colorado this last weekend. The wood in Douglas County dates back up to 55 million years ago. To put this in perspective, the last phase of tectonic activity formed Rocky Mountains around 80-55 million years ago; so these are wood from the forests on the craggy, new Rocky Mountains! Interestingly, much more recently in time (about 100ish years ago), wood forested from the Palmer Divide was used to build cities like Denver. Forests have covered the land here in east-central Colorado for a long time!
Tags: #Forest #PetrifiedWood #Colorado #Geology #History @mineralcase
from ancient Colorado!
I love the detail of the bark in these rocks.
Below: This is about a 12 inch tall slab of rock!
Above: This section of log was quite detailed showing red to yellow including some agatized sections in the center. The rock is about 18 inches long and was the longest I brought home; although it wasn't the heaviest. I left two of the largest finds with my friend so he can put them in his rock garden.
Below: Some beautiful reds and orange colors and many agatized pieces. I plan to grind some of the more agatized pieces and those with multiple bands of color into cabochons to see how they polish.
Above: Some pieces have spectacular colors! I plan to pick up a bunch more for tumbling my next trip.
Below: I put this on a medium grit lap wheel; I need much finer grit for a polish, but after the course preshaping it looks nice; especially with the bark!