@TDWolsey,
"tubes" can be many things, from various spcies of ancient annelids to "fulgurites" ( fused sand and sandstones rsulting from lightning hits), all the way to gases in ropy lava. Wed need a picture but answer this
1Is the geology of the area (you said it was sandstone), reported to be water deposited sandstones or beach/dune deposits?
2Are the sandstones made up of largw "pebbles" or finer grained warn grains of sands?
Better yet, take some pictures with something man -made in the picture to show the sizes of the rock slabs.
Well be here