Bill MinarikLeucite has a range of volcanic hills named after it, see:
https://www.geowyo.com/leucite-hills.html
These are strange, high potassium lamproites from the mantle, only 1-2 million years old.
Match that, organic goo #carpathite !
Students at Smith College have a nice page of #leucite thin section images:
https://www.science.smith.edu/geosciences/petrology/petrography/leucite/leucite.html
