The Geologic Data Subcommittee (GDS) of the Federal Geographic Data Committee (FGDC) is responsible for coordination of geologic data-related activities

### FGDC Digital Cartographic Standard for

Geologic Map Symbolization

### Log of revisions to the Standard:

** Most recent revision:** 3/7/10 (Section 17)

**Entire document, including Color Chart and Pattern Chart:**- 3/7/10 -- correction to symbols 17.63 and 17.64 (they were transposed)
- 9/10/09 -- minor typographic corrections in Sections 2, 5, 21, and 22
- 5/22/08 -- correction to a pattern in Section 14
- 9/5/07 -- addition of brief explanations to Color Chart and Pattern Chart
- 5/28/07 -- minor corrections to symbol descriptions in Sections 2, 6, and 18
- 4/24/07 -- minor corrections to Sections 2, 5, 13, 19, 22, 25, 26, 30, and 35; revisions to Acknowledgments section in introductory text
- 2/5/07 -- corrections to Preface to Appendix A and Section 29; additional minor editorial corrections (including filename changes)

**Entire document, without Color Chart and Pattern Chart:**- 3/7/10 -- correction to symbols 17.63 and 17.64 (they were transposed)
- 9/10/09 -- minor typographic corrections in Sections 2, 5, 21, and 22
- 5/22/08 -- correction to a pattern in Section 14
- 5/28/07 -- minor corrections to symbol descriptions in Sections 2, 6, and 18
- 4/24/07 -- minor corrections to Sections 2, 5, 13, 19, 22, 25, 26, 30, and 35; revisions to Acknowledgments section in introductory text
- 2/5/07 -- corrections to Preface to Appendix A and Section 29; additional minor editorial corrections

**Introductory text:**- 4/24/07 -- revisions to Acknowledgments section

**Index to symbols in Appendix A and to topics in introductory text:**- 2/5/07 -- minor editorial corrections

**Preface to Appendix A:**- 2/5/07 -- editorial corrections to Table 2

**Section 2 -- Faults:**- 9/10/09 -- minor typographic corrections in Notes on Usage column on p. A-2-2, A-2-5, A-2-9, A-2-10, and A-2-11
- 5/28/07 -- minor correction to a symbol description on p. A-2-14
- 4/24/07 -- minor lineweight correction on p. A-2-11

**Section 5 -- Folds:**- 9/10/09 -- minor typographic corrections in Notes on Usage column on p. A-5-13
- 4/24/07 -- minor lineweight correction on p. A-5-8

**Section 6 -- Bedding:**- 5/28/07 -- minor corrections to four symbol descriptions on p. A-6-2

**Section 13 -- Glacial and Glaciofluvial Features:**- 4/24/07 -- minor lineweight correction on p. A-13-1

**Section 14 -- Periglacial Features:**- 5/22/08 -- corrected pattern in the Symbol column for Ref. No. 14.3 (polygonal patterned ground) on p. A-14.1. Information in the Carto. Specs. column is unchanged

**Section 17 -- Landslide and Mass-Wasting Features:**- 3/7/10 -- correction to symbols 17.63 and 17.64 (they were transposed)

**Section 18 -- Volcanic Features:**- 5/28/07 -- minor correction to a symbol description on p. A-18-3

**Section 19 -- Natural Resources:**- 4/24/07 -- minor lineweight corrections on p. A-19-3 and A-19-5

**Section 21 -- Neotectonic and Earthquake-Hazard Features:**- 9/10/09 -- minor typographic corrections in Notes on Usage column on p. A-21-1 and A-21-2

**Section 22 -- Plate-Tectonic Features:**- 9/10/09 -- minor typographic corrections in Notes on Usage column on p. A-22-1
- 4/24/07 -- minor lineweight corrections on p. A-22-1 and A-22-2

**Section 25 -- Planetary Geology Features:**- 4/24/07 -- minor lineweight corrections on p. A-25-3 and A-25-5

**Section 26 -- Geohydrologic Features:**- 4/24/07 -- minor lineweight correction on p. A-26-4

**Section 29 -- Boundaries:**- 2/5/07 -- corrections to type style for national, state, and county (etc.) boundaries

**Section 30 -- Topographic and Hydrographic Features:**- 4/24/07 -- minor lineweight corrections on p. A-30-4 and A-30-6

**Section 35 -- Bar Scales:**- 4/24/07 -- minor lineweight corrections on p. A-35-1, A-35-2, A-35-3, A-35-4, and A-35-5

**CMYK Color Chart:**- 9/5/07 -- addition of brief explanation to header in upper left-hand corner
- 2/5/07 -- filename change (from "...platea.pdf" to "...culorchart.pdf")

**Pattern Chart:**- 9/5/07 -- addition of brief explanation to header in upper left-hand corner
- 2/5/07 -- filename change (from "...plateb.pdf" to "...patternchart.pdf")

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