Inclusions

10-25%. eq & el. a-sr. <1.9 mm. Close to single-spacing. Randomly oriented. Unimodal, poorly-sorted.

Dominant (50-70%): Pumice fragments; eq & el. a-sr. <1.75 mm. Rounded pumice fragments are very distinct and have well-preserved vesicles intact.

Frequent (30-50%): Plagioclase feldspar; eq & el. sa. <2.1 mm. Many grains are fractured, some display twinning; some sherds have unidentified type of alteration concentrated in center of grain (may be effect from thin section production).

Common (15-30%): Volcanic glass; el. a-sa. <0.76 mm. Few well-preserved rounded vesicles are still intact.

Very Few (2-5%): Fine-grained volcanic rock fragments; eq & el. sa. Fine-grained lithics; light-colored in PPL (pinkish-grey to light brown).

Very Few (2-5%): Opaques; eq. sr-r. <0.32 mm. Most are isotropic; some are dark red-brown.

Rare (0.5-2%): Textural features; eq. sr. <0.74 mm. Orange-red-brown to light-mid brown, subangular to subrounded discordant clay pellets.

Very Rare (<0.5%): Orthopyroxene; el. sr. 0.31-0.52 mm. Light green or orangish-brown in PPL; parallel extinction in XPL.

Very Rare (<0.5%): Volcanic rock fragments; el. sa. <0.34 mm. Dark red-brown fragment with plagioclase phenocrysts.

Matrix

63-87%. Non-calcareous. Light brown to dark brown in PPL; some sherds are orangish-brown (PP 122, 127, 177, 181); many sherds have clear firing core with lighter color on outer edge and darker center. Colors under XPL are varied: yellow to orange, yellowish-orange to dark brown with slight optical activity (PP 41, 56, 70, 75, 76, 80, 85, 121, 177, 181, 217), dark orangish-brown to dark brown (PP 127, 174, 175, 183). Slight, moderate, and high optical activity observed.

Voids

3-12%. Consisting mainly of meso- and macro-elongate voids and meso- and macrovughs, some elongate voids extend out from vughs. Voids in PP 50 are irregular and parallel to wall.