Another old model brought back to life. This is the Click on the image below to see the model in action. This is the ternary system quartz – nepheline – kalsilite, also called petrogeny’s residua system, which is used to describe the composition of many cooled residual magmas and the genesis of very under saturated alkaline rocks.
More on this classification, used for cooled residual magmas, on Alessandro Da Mommio’s website, for example his page on Tracheite.
I just tried Sketchfab today at lunch. In less than five minutes I was able to bring back from the dead my defunct AutoCAD 3D model of the Yoder-Tilley tetrahedron for basalt classification. Click on the image below to see the model in action. If you want to learn more about basalt classification, check on Alessandro Da Mommio’s awesome website.
My top two favorite 3D geology models from today’s browsing: