As to your question of conveying why this stuff is neat…I don’t think there’s one answer…it seems that the most effective blogs out there for scienctific/technical information stay relatively focused (i.e., not too much about personal life) and post often (multiple times a week).

Through a series of exposures in construction sites, ditches, and creeks, I have been informally tracing old river gravels and sands for close to 3/4 of a mile along a local highway, northeast of Atlanta, GA. In several places the underlying Piedmont saprolite is visible beneath the basal conglomerate.

The present-day course of the Chattahoochee River is about 1/2 mile west and about 30 – 40 feet lower than some of these gravels.

So how do we convey “why this stuff is neat” on a blog?

If you want to get into the fluid mechanics of bedforms more then you need a textbook like Leeder’s “Sedimentology and Sedimentary Basins: from turbulence to tectonics”. The whole first half is pretty mathy.
There’s a classic book by J.R.L. Allen in the late ’70s but the name escapes me…I think it’s called ‘sedimentary structures’ or something.

I’m trying to think of any shorter-than-textbook resources…but I can’t. If you Google ‘sedimentary structures’ the first bunch are decent websites for some photos and such, but not much about their formation.
I will keep my eyes open for good resources.