.0 SEDIMENTARY AND IGNEOUS ROCKS OF EARLY TERTIARY AND LATE CRETACEOUS AGE TKda DENVER AND ARAPAHOE FORMATIONS--Sandstone, mudstone, claystone, and conglomerate; Denver is characterized by andesitic materials Tdv BASALTIC FLOWS IN DENVER FORMATION NEAR GOLDEN (AGE 62-64 M.Y.) TKdl DENVER FORMATION OR LOWER PART OF DAWSON ARKOSE--Arkosic sandstone, shale, mudstone, conglomerate, and local coal beds TKr RATON FORMATION--Arkosic sandstone, siltstone, and shale; contains major coal deposits in Raton Basin