... and then for wind vectors of unequal magnitude: 22/23

However, I think that the simplicity, elegance, and explanatory power of Rubin and Hunter's 1987 paper are striking. Here are two animations that summarize what happens as we increase the divergence angle, first for wind vectors of equal size, ... 21/23

Last week I was co-leading a field trip in Utah, to check out some fluvial and eolian rocks. It was exhausting but fun and forced me to think more carefully than before about complex bedforms. This is a 3D model of one of the many stunning exposures of the Navajo Sandstone near Escalante 🧪⚒️

This is better for looking at stratigraphy:

Yes I do, for example (although this one doesn't show the stratigraphy very well):

Highlighting the grain flow and grain fall deposits in the preserved lower part of a Jurassic dune, Navajo Sandstone, Grand Staircase - Escalante National Monument, Utah 🧪⚒️