PRELIMINARY GEOLOGIC MAP OF THE MOUNT VERNON QUADRANGLE, SKAGIT COUNTY, WASHINGTON = CARTE GEOLOGIQUE PRELIMINAIRE DU QUADRILATERE MOUNT VERNON, COMTE SKAGIT, WASHINGTONDETHIER DP; WHETTEN JT.1981; ; USA; DA. 1981; 10;[OPEN-FILE REP. (U. S. GEOL. SURV. 1978); ISSN 0196-1497; NO 81-0105]Serial Issue

GEOLOGIC MAP OF PARTS OF THE WEST FRANKLIN, CABORN, AND MOUNT VERNON QUADRANGLES, HENDERSON AND UNION COUNTIES, KENTUCKY. SCALE 1:24000.JOHNSON WD JR.1974; U.S. GEOL. SURV., GEOL. QUADRANGLE MAPS.; USA; 1974, NUM. 0001, P. 1Map

GEOLOGIC MAP OF THE MOUNT VERNON QUADRANGLE, ROCKCASTLE COUNTY, KENTUCKY. 1:24.000.SCHLANGER SO; WEIR GW.1971; U.S. GEOL. SURV., GEOL. QUADRANGLE MAPS; USA; 1971, NUM. 0902Miscellaneous