Geological Map Legend Symbols

Accordingly, the symbols in this postscript implementation of the standard also are grouped into sections. Some geologic maps also show the orientation of the foliation in metamorphic rocks with special foliation strike and dip symbols. The federal geographic data committee (fgdc) has endorsed this document as the national standard for the digital cartographic representation of geologic map features.

On geologic maps that have many map units, it is sometimes impossible to. A dictionary of earth sciences. 52 rows in the fgdc digital cartographic standard for geologic map symbolization document, the symbols are contained in appendix a, which is divided by feature type into sections.

Geological map has many parts.

Geologic maps are maps that depict the rock units that crop out at earth’s surface. The topographic maps on the united states geological survey (usgs) and have evolved for more than a century. Rock units or geologic strata are shown by color or symbols. Since each map is unique, placement of the legend and symbolization might vary from map to map.order paper u.s.