We use realistic units to indicate the scale: seconds (s) and kilometres (km).
The scale of the channel and overbank intervals in the formation suggests river systems certainly tens, and probably hundreds of kilometres in length.
Some of these may be found several kilometres from the base.
Free balloons carrying lighter instruments have continued these records to still higher regions, heights of 25 kilometres and more having been reached.
We know that they typically have diameters of a few kilometres and are largely composed of the biologically essential elements, hydrogen, carbon, nitrogen, oxygen.
And if this happens to dust grains, it presumably also happens to kilometre-size objects.
Herding distances are scarcely further than five kilometres from the villages.
The changes in the dipping of overlying strata can be traced over distances of several kilometres.
