Pamphlet [p. 2]. Lissie Formation. Upper part [mapped as Montgomery Formation, 1968 edition], clay, silt, sand, and very minor siliceous gravel of granule and small pebble size, gravel more abundant northwestward, locally calcareous, concretions of calcium carbonate, iron oxide, and iron-manganese oxides common in zone of weathering; fluviatile; surface fairly flat and featureless except for numerous rounded shallow depressions and pimple mounds. Lower part [mapped as Bentley Formation, 1968 edition], clay, silt, sand, and minor amount of gravel; gravel slightly coarser than in upper part, noncalcareous, iron oxide concretions more abundant than in upper part; fluviatile; very gently rolling. Total thickness 200+/- feet. Unconformably overlies Willis Formation and unconformably underlies Beaumont Formation. Age is Pleistocene.
[Mapped mostly in central and eastern parts of map sheet in Hardin, Harris, Jasper, Liberty, Montgomery, Newton, Polk, San Jacinto, and Tyler Cos., TX.]

Source: Publication.

Lissie Formation. Sand, silt, clay, and minor amount of gravel. Characterized by "moderate permeability, moderate drainage, and high shear strength; geologic units include meanderbelt, levee, crevasse splay, and distributary sands and flood-basin mud over meanderbelt sand." Thickness about 200 feet. Overlies Willis Formation; underlies Beaumont Formation and younger Quaternary deposits. Age is Pleistocene.
Mapped in De Witt, Victoria, Jackson, Lavaca, Colorado, Wharton, Austin, and Waller Cos., southeastern TX.

Source: Modified from GNU records (USGS DDS-6; Denver GNULEX).

Lissie Formation. Sand, silt, clay, and minor amount of gravel, mostly mud veneer over meanderbelt sand; surface gently rolling; only lower part present. [Thickness not stated.] Lies above Goliad Formation (Pliocene) and below Holocene alluvium. Age is Pleistocene.
[Mapped in Jim Wells and Live Oak Cos., southern TX.]

Source: Publication.

Includes three facies--coarse-grained channel (10-25 m thick), fine-grained channel (10-25 m thick, 100+ m thick in subsurface), and fine-grained overbank (55-65 m thick). Outcrop area extends into Austin and Monterrey quadrangles to the south. These three maps show the exposed extent of the Beaumont. Of middle Pleistocene age.

Source: GNU records (USGS DDS-6; Denver GNULEX).

Lissie Formation. Outcrop area extends into the White Lake 4 x 6 degrees quadrangle to the north and the Monterrey 4 x 6 degrees quadrangle to the south; together, these maps show the extent of the formation. Three units mapped: alluvium, about 60 m thick; alluvial sand, silt, and clay, 10 to 100+ m thick; and alluvial silt and clay, 55 to 65 m thick. Disconformably overlies Willis Formation. Facies include: meanderbelt, levee, crevasse splay, distributary sand, flood-basin mud, point bars, dunes, backswamp and lake deposits. Age is middle Pleistocene; contains Pleistocene vertebrate fauna.

Source: Modified from GNU records (USGS DDS-6; Denver GNULEX).

Mapped as an undifferentiated unit because distributary and interdistributary facies too small in area to map separately. Is about 60 m thick. Outcrop area shown on this map connects with Austin and White Pine 4 deg x 6 deg maps to north. These maps show the exposed extent of the Lissie in TX Gulf Coast basin. Contains vertebrate fauna. Of middle Pleistocene age.

Source: GNU records (USGS DDS-6; Denver GNULEX).