0 0.5 1 1.5 2 Miles Plate 1 Surficial Geologic Map of the Boston South Quadrangle, Massachusetts Artifical Fill - Engineered or unengineered fill; primarily sand with gravel; composition, character, and density varies with location and age. Glacial Till, Drumlin - Glacial till, consiting primarily of clay and sand with gravel, cobbles, and silt; generally dense to very dense, varies in color from yellow to orange to brown/grey. Glacial Till, ground moraine - Glacial till, consisting primarily of clay and sand with gravel, cobbles, and silt; generally dense to very dense, varies in color from yellow to orange to brown/grey. Includes large areas of exposed bedrock. Glacio-fluvial deposits - Glacial outwash and drift deposited by melt- water. Consists primarily of and sand and gravel with cobbles; heterogenous; stratified in places; loose to moderately dense. Includes outwash, eskers, kames. Marsh Deposits - Modern marsh and swamp deposits, consisting primarily of silt and fine sand with abundant organics and peat; occasional clay and/or gravel lenses; generally loose to moderately dense/stiff; color generally brown to dark grey/black. Geologic Units Compiled by C.M. Brankman, 2004 from published and unpublished sources (see text for references) Notes - All geologic contacts are approximate. Topographic base is 1:25000 USGS topographic quadrangles as provided in digital format by MassGIS. Datum is Massachusetts State Plane, NAD 83. 0 1 2 3 4 0.5 Kilometers Scale - 1:24,000 Beach Deposits - Modern beach and shoreline deposits, consisting primarily of fine to coarse sand with some gravel; generally loose to moderately dense; color generally tan to brown.
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Surficial Geology
LITHCODE
Artificial Fill
Drumlin (Glacial Till)
Glaciofluvial deposits (Outwash)
Ground Moraine (Till w/ bedrock)
Marsh Deposits
Beach Deposits
0 0.5 1 1.5 2Miles
Plate 1Surficial Geologic Map
of theBoston South Quadrangle,
Massachusetts
Artifical Fill - Engineered or unengineered fill; primarily sand with gravel; composition, character, and density varies with location and age.
Glacial Till, Drumlin - Glacial till, consiting primarily of clay and sand with gravel, cobbles, and silt; generally dense to very dense, varies in color from yellow to orange to brown/grey.
Glacial Till, ground moraine - Glacial till, consisting primarily of clay and sand with gravel, cobbles, and silt; generally dense to very dense, varies in color from yellow to orange to brown/grey. Includes large areas of exposed bedrock.
Glacio-fluvial deposits - Glacial outwash and drift deposited by melt- water. Consists primarily of and sand and gravel with cobbles; heterogenous; stratified in places; loose to moderately dense. Includes outwash, eskers, kames.
Marsh Deposits - Modern marsh and swamp deposits, consisting primarily of silt and fine sand with abundant organics and peat; occasional clay and/or gravel lenses; generally loose to moderately dense/stiff; color generally brown to dark grey/black.
Geologic Units
Compiled by C.M. Brankman, 2004from published and unpublished sources
(see text for references)
Notes - All geologic contacts are approximate. Topographic base is1:25000 USGS topographic quadrangles as provided in digital formatby MassGIS. Datum is Massachusetts State Plane, NAD 83.
0 1 2 3 40.5Kilometers
Scale - 1:24,000
Beach Deposits - Modern beach and shoreline deposits, consisting primarily of fine to coarse sand with some gravel; generally loose to moderately dense; color generally tan to brown.
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