Rick - three years ago I was in a sweeping curve doing all of about 15 mph when the *%&*$ tar&gravel crap bit me. Broken ankle and many months later I was fine. Don't worry, my ankle took the bike's share of problems so the bike was fine.
That stuff should be illegal. I have recently turned onto a secondary road and right there as the gravel starts is the sign saying, gravel surface ahead. I stop, slowly maneuver the bike so that I can get off of those darn surfaces as quickly as possible. Around here there must be four inches of gravel dumped on to the tar and left for weeks. I guess they are too worried about people complaining about the tar is why they dump so much gravel. It's that or someone state employee has a brother in the gravel business.
Glad to hear you are basically okay.