Note 86 — Chapter IX
Reading edition
Compare the following sections:
Cotopaxi (near Tiupullo). Vesuvius (at Pompeii).
Soil 1 ft. 0 in.Soil 3 ft. 0 in.
Fine yellow pumice 5 " 0 "Brown incoherent tuff 1 " 6 "
Compact black ashes, with seams of pumice 10 " 0 "Small scoriæ and white lapilli 0 " 3 "
Fine yellow pumice 1 " 6 "Brown earthy tuff 4 " 9 "
Compact black ashes 12 " 0 "Whitish lapilli 0 " 1 "
Fine yellow pumice 2 " 0 "Gray solid tuff 0 " 3 "
Compact black ashes, with seams of pumice. Pumice and white lapilli 0 " 3 "