Page 264 - Laboratory Manual in Physical Geology

Control data and monuments Coastal features
Vertical control Foreshore flat Mud
Third order or better, with tablet BM 16.3 Rock or coral reef Reef
Third order or better, recoverable mark 120.0 Rock bare or awash *
Bench mark at found section corner BM 18.6 Group of rocks bare or awash * * * *
* * * * * *
Spot elevation 5.3 Exposed wreck
Depth curve; sounding 3
Contours Breakwater, pier, jetty, or wharf
Topographic Seawall
Intermediate
Index Rivers, lakes, and canals
Supplementary Intermittent stream
Depression Intermittent river
Cut; fill Disappearing stream
Bathymetric Perennial stream
Intermediate Perennial river
Index Small falls; small rapids
Primary Large falls; large rapids
Index primary Masonry dam
Supplementary

Boundaries Dam with lock
National
State or territorial
County or equivalent Dam carrying road
Civil township or equivalent
Incorporated city or equivalent
Park, reservation, or monument Perennial lake; Intermittent lake or pond
Dry lake Dry lake
Surface features Narrow wash
Levee Levee Wide wash Wide wash
Sand or mud area, dunes, or shifting sand Sand Canal, flume, or aquaduct with lock
Intricate surface area Strip mine Well or spring; spring or seep
Gravel beach or glacial moraine Gravel
Tailings pond Tailings pond Buildings and related features
Building
Mines and caves School; church
Quarry or open pit mine Built-up area
Gravel, sand, clay, or borrow pit Racetrack
Mine tunnel or cave entrance Airport
Mine shaft Landing strip
Prospect Well (other than water); windmill
Mine dump Mine dump Tanks
Tailings Tailings Covered reservoir
Gaging station
Vegetation Landmark object (feature as labeled)
Woods Campground; picnic area
Scrub Cemetery: small; large Cem
Orchard
Vineyard Roads and related features
Mangrove Mangrove Roads on Provisional edition maps are not classified as primary,
secondary, or light duty. They are all symbolized as light duty roads.
Glaciers and permanent snowfields Primary highway
Contours and limits Secondary highway
Form lines Light duty road
Unimproved road
Marine shoreline Trail
Topographic maps Dual highway
Approximate mean high water Dual highway with median strip
Indefinite or unsurveyed
Topographic-bathymetric maps Railroads and related features
Mean high water Standard gauge single track; station
Apparent (edge of vegetation) Standard gauge multiple track
Abandoned
Submerged areas and bogs
Marsh or swamp Transmission lines and pipelines
Submerged marsh or swamp Power transmission line; pole; tower
Wooded marsh or swamp Telephone line Telephone
Submerged wooded marsh or swamp Aboveground oil or gas pipeline
Rice field Rice Underground oil or gas pipeline Pipeline
Land subject to inundation Max pool 431
FIGURE 9.4 Symbols used on U.S. Geological Survey topographic quadrangle maps.

234 ■ L ABOR ATORY 9