Converted delta bedding layers diagram to SVG format.
Corrected font-weight in previous SVG diagrams.

Sketch set the font-weight property to 260 which none of the browsers I tested recognised.
Converted channel cross section diagrams to SVGs
Converted riffles & pools diagram to SVG format.

The SVG code for this is _horrible_ the program I use to make the diagram (Sketch) wouldn't export SVG code to rotate the arrows correctly so I had to export it to EPS and convert that to SVG with some dodgy online tool. Yuck. If I get chance, I'll try and manually fix the SVG code exported by Sketch.