As a predominantly fluvial geomorphologist, I am particularly intrigued by channel patterns. So for this month, I propose that we focus on finding areas that reveal notably pathological examples of transitions between archetypes of alluvial channel patterns...meandering, braided, and straight.

This is a famous topic in fluvial studies, and was one that was dear to the heart and mind of the late Reds Wolman (see for example USGS professional Paper 282-b). When an alluvial channel adopts a particular planform character, it is an indication of a fundamental change in its discharge, gradient, sediment load, substrate, tectonic environment...or, of cousre, some pathological combination of any of them.

I will start with an amazing and pathological array of channel pattern transitions all crammed into one corner of Tajikistan (note that it is an area draining the edge of a fold and thrust belt). Seriously, this spot is completely wild.

Ahh, right....Tajikistan
Cheers to all geomorphic transitions, fluvial or otherwise.