.0 UNCONSOLIDATED SURFICIAL DEPOSITS AND ROCKS OF QUATERNARY AGE Qa MODERN ALLUVIUM--Includes Piney Creek Alluvium and younger deposits Qg GRAVELS AND ALLUVIUMS (PINEDALE AND BULL LAKE AGE)--Includes Broadway and Louviers Alluviums Qgo OLDER GRAVELS AND ALLUVIUMS (PRE-BULL LAKE AGE)--Includes Slocum, Verdos, Rocky Flats, and Nussbaum Alluviums in east, and Florida, Bridgetimber, and Bayfield Gravels in southwest Qe EOLIAN DEPOSITS--Includes dune sand and silt and Peoria Loess Qeo OLDER EOLIAN DEPOSITS--Includes Loveland Loess Qd GLACIAL DRIFT OF PINEDALE AND BULL LAKE GLACIATIONS--Includes some unclassified glacial deposits Qdo OLDER GLACIAL DRIFT (PRE-BULL LAKE AGE) Ql LANDSLIDE DEPOSITS--Locally includes talus, rock-glacier, and thick colluvial deposits Qb BASALT FLOWS (AGE <1.8 M.Y. 1)