For really large, undeveloped deltas, Canada's Mackenzie Delta is a massively good example for the geology of a delta, as there is little heavy forestation affecting it:
It's a fascinating delta ... but ... zoom into Great Bear Lake and you can see it at the resolution where you get individual TREES!!! E.g.: http://maps.google.com/?ll=66.278521...h&vpsrc=6&z=17 ... drool! :O
If I might suggest ...
(If the image is blurry, zoom out a little and zoom back in.)
Bing has a really nice font on their maps. What is that? Anybody know?