Another section 53 " thick, from bottom up : floor of the shelter, 17 " of broken concretionary limestone fragments, 16 " of brown ash, 12 " of gray layered ash grading into the brown below it, 8 " of bat guano, top.
12.
S-5-7, from bottom to top : rock bottom of the shelter, 5 " angular fragments, 8 " smooth concretionary limestone fragments mixed with brown dust, 6 " of ash mixed with angular fragments, 10 " of layered gray ( volcanic ? ) ash grading into a layer of brown, 4 " of hard burned guano, 4 " of unconsolidated bat guano, top.
