Wow... thanks, Paul. That was quick. You may indeed be correct on the Jurassic age of the Basalt crater. I don't know...although it's clear it couldn't have been any earlier. That's why I want to find out what's been done so far. I admit that I lack expertise in identification of both ejecta and debris flows. I agree with you that shocked quartz might be seen in material covering the tracks; also possibly higher than background amounts of iridium. Anyway If it wasn't the Upheaval Crater impact causing burial, what caused it?
The most compelling item suggesting rapid burial is the pristine condition of the tracks. Little or no erosion has occurred on any of them and this seems to hold true regardless of their elevation above the main collection of tracks. Another thing suggesting rapid burial is that the terrain which existed at the time appears to have been preserved. See the attached link to a photo I took of a tilted trackway where an animal obviously started to slide down hill and which is still oriented in that direction. Martin agrees with me on this point of preserved terrain. These two things seem to indicate a local rate of sedimentation which I would consider quite "rapid".
Another curious item which may or may not be connected to rapid burial has to do with the variety of animals (including at a minimum raptors, iguanodons, ankylosaurs, sauropods, and at least one very large acrocanthasaurus). According to the trackway orientation most appear to have been headed somewhere or going away from something rather than wandering aimlessly; mainly they seem to have been traveling eastward and away from the direction of both Upheaval Crater and the Moab Fault. Also, if one of the meat eaters was hunting or dining on a variety of herbivore it seems unlikely that another variety wouldn't avoid the area if they were able. No other track sites have been found with such a variety of animals all making tracks together more or less simultaneously to my knowledge. Why is that? What was going on?
At any rate, thanks for encouraging my behavior, Paul. I am experienced in making thin sections and have started some. However, I lack anything more powerful than a hand lens at present. Besides, without experience knowing what I'm looking at I may have trouble recognizing "shocked" Basalt quartz crystals from the variety which is just "moderately surprised" or "mildly amused".
I will most likely be bothering you again before too long.