Glacial till and moraines. Found at high elevations mostly in the Sierra Nevada and Klamath Mountains.

Includes some unclassified glacial deposits

Quaternary colluvium, fanglomerate, and talus plus some glacial debris in upland valleys.

Alluvium; includes glacial deposits along the Ohio River and its tributaries west of Cannelton locks

Glacial deposits, undifferentiated; shown locally

PLEISTOCENE SERIES - Loess, till, drift, clay, silt, sand and gravel (shown on cross section, not on map)

Alluvium: mainly valley fill consisting of silt, sand, and gravel; includes some terrace deposits and glacial drift of Pleistocene age in some areas; locally includes hot spring tufa. The older part of the alluvium, where present, is probably of Pliocene age.

Glacial drift: morainal and outwash plain deposits of mountain glaciers; mainly ill-sorted and poorly rounded boulders, cobbles, pebbles, and sand; may include alluvium in places

MORAINAL DEPOSITS

Glacial and Alluvial Deposits - underlying bedrock geology unknown.

Glacial and Alluvial Deposits - underlying bedrock geology unknown.

Glacial and Alluvial Deposits - underlying bedrock geology unknown.

Poorly sorted

Mostly unconsolidated silt, sand, and gravel valley fill with some clay; includes low-level terrace, marsh, peat, artificial fill, and glacial deposits locally.

Glacial and glaciofluvial sand, gravel, and till; includes alpine glacier outwash and till as well as some Recent alluvium.

Unconsolidated to partly consolidated fluvial and glaciofluvial sand and gravel with minor amounts of silt and clay. Includes marine terrace along west coast of the Olympic Peninsula.

GLACIAL DEPOSITS--Till and outwash of sand, gravel, and boulders.

LANDSLIDE DEPOSITS--Locally includes intermixed landslide and glacial deposits, talus, and rock-glacier deposits.

UNDIVIDED SURFICIAL DEPOSITS--Mostly alluvium, colluvium, and glacial and landslide deposits. Primarily in Yellowstone area and Bighorn Mountains.