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Plume and moss agate [1]
['This Content Is Not Subject To Review Daily Kos Staff Prior To Publication.']
Date: 2023-11-23
Welcome to the Street Prophets Coffee Hour cleverly hidden at the intersection of religion and politics. This is an open thread where we can share our thoughts and comments about the day. Let’s start today by looking at some plume and moss agate which were displayed in the Rice Museum of Rocks and Minerals in Hillsboro, Oregon. This museum houses a world-class collection recognized as the finest in the Pacific Northwest and one of the finest in the United States.
According to the Museum display:
“Mineral growths within agate often resemble feathers, plumes, or moss-like structures. They are not fossils.”
Regarding plumes, the display explains:
“Plumes form when tiny spheres of chalcedony crystallize on the walls of a water-filled joint or fault surface.”
Regarding moss, the display explains:
“Moss-like growths occur when clay minerals form long chains or root-like structures from the walls of a cavity and then are either covered with a thin coating of chalcedony to form tubes or are completely covered to form green, brown, yellow, or red moss in the agate.”
Open Thread
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https://www.dailykos.com/stories/2023/11/23/2202231/-Plume-and-moss-agate?pm_campaign=front_page&pm_source=more_community&pm_medium=web
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