Skip to main content
Search
Search This Blog
Dear Amelia
a weekly note to someone I love
Share
Get link
Facebook
X
Pinterest
Email
Other Apps
December 23, 2017
How sand can change a fossil
"
So how did this magnificent opalized tree came to be? Initially, water filled the cracks and empty spaces of the source fossil, and the silica content in the water hardened and turned into opal or chalcedony."
Sand (silica)
https://www.zmescience.com/other/geopicture/geopicture-of-the-week-tree-fossil-with-opal-growth-rings/
Comments
Popular Posts
July 23, 2019
Building into the earth in Iceland
June 29, 2017
Why is there a pyramid on the US dollar bill?
Comments
Post a Comment