STRATIGRAPHIC SECTIONS Forty-three sections were measured along the Glass Mountains escarpment from Dugout Mountain northeastward to the vicinity of the Allison ranch house. Type sections: The lower part of Section 8 (units 2-23) is the type section for the Lenoxhills formation; the lower part of Section 22 (units 2-30) is the new type section of the Nealranch formation; and Section 43 is the redescribed type section of the Gaptank formation. The sections are divided into lithologic units which are numbered in ascending order from the base of the exposure. The terminology used to describe the rock types in these sections is briefly outlined below. Calcirudite: pebbles and cobbles dominantly limestone; matrix of finer calcite fragments and calcite cement. Conglomerate: pebbles and cobbles of various rock types, commonly with limestone cobbles; siliceous material forming the matrix and clay minerals as the bonding agent. Calcarenite: calcite or carbonate particles (commonly fine shell fragments) of sand size dominant; interstices of the rock filled by diagenetic calcite, but much original clay mineral material may also be present. Sandstone: sand size particles, usually quartz or siliceous fragments, calcite particles generally not dominant.