Figure F46. Armored lapillus in Sample 192-1184A-45R-6, 82-85 cm. A fine-grained basaltic fragment is armored by concentric layers of ash in the finer ash matrix of a lithic vitric lapilli tuff. The concentric layers of ash consist of fine glass and crystallites (field of view = 5.5 mm; plane-polarized light; photomicrograph ID# 1184A

Figure F46. Armored lapillus in Sample 192-1184A-45R-6, 82-85 cm. A fine-grained basaltic fragment is armored by concentric layers of ash in the finer ash matrix of a lithic vitric lapilli tuff. The concentric layers of ash consist of fine glass and crystallites (field of view = 5.5 mm; plane-polarized light; photomicrograph ID# 1184A_094).