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geologicalROCK-COLOR CHARTwith genuine Munsell color chips Produced by
geologicalROCK-COLOR CHARTwith genuine Munsell color chips 2009 Year Revised 2009 ProductionDate put into useThis publication is a revision of the previously published GeologicalSociety of America (GSA) Rock-Color Chart prepared by the Rock-ColorChart Committee (representing the U.S. Geological Survey, GSA, theAmerican Association of Petroleum Geologists, the Society of EconomicGeologists, and the Association of American State Geologists). Colorswithin this chart are the same as those used in previous GSA editions,and the chart was produced in cooperation with GSA.Produced by4300 44th Street Grand Rapids, MI 49512 Tel: 877-888-1720 munsell.com
The Rock-Color ChartThe pages within this book are cleanable and can be exposed tothe standard environmental conditions that are met in the field.This does not mean that the book will be able to withstand all ofthe environmental conditions that it is exposed to in the field.For the cleaning of the colored pages, please make sure not touse a cleaning agent or materials that are coarse in nature. Thesematerials could either damage the surface of the color chips orcause the color chips to start to delaminate from the pages.With the specifying of the rock color it is important to rememberto replace the rock color chart book on a regular basis so that thecolors being specified are consistent from one individual to another.We recommend that you mark the date when you started to usethe the book. There is a space provided on the pevious page.It is recommend that you replace the book after two years ofuse. This time frame is suggested based upon typical usagepatterns and conditions.PurposeThis chart is designed primarily for field use, although it indicatesthe range of rock colors for all purposes. Names for colors otherthan those shown on the chart can be found in The UniversalColor Language and Color Names Dictionary (publicationPB 265-225, available from the U.S. Department of Commerce,National Technical Information Services {NTIS}, Springfield, VA22161).
Using the chartThe chart is chiefly of value in describing the colors of medium-tofine-grained rocks but is also helpful in working with coarsegrained rocks. In describing very coarse-grained rocks, such asporphyritic granites, it is necessary to give the color of eachmineral. The chart is designed to cover the range of the chiefrock-forming minerals such as feldspar, quartz, mica, andhornblende. If the rock is not too coarse grained, a blending of theindividual colors can be secured by spinning the specimen like acolor disc or by looking at the rock from a short distance and thusgetting a monotone that can be matched with the chips on thechart. The number and range of colors on the Rock-Color Chart arebased on studies of more than 1,300 selected rock specimenscollected from the United States. The colors of these rocks wereplotted on the Munsell charts, which served as a basis for selectingthe colors to be included. It is believed that the full range of rocksis covered by the chart, except possibly for very rare rocks of highchroma. A neutral mask is included with the chart for isolatingindividual colors.Wet vs. DryFor most rock colors, the chart will serve for both wet and dryspecimens. It will usually be found that wetting a rock specimenmerely decreases the value, that is, makes the specimen darker,but does not change the chroma. Accordingly, the Rock-ColorChart includes colors as far as possible into the dark range in orderto cover wet specimens as well as dry. For the first time, the chartincludes glossy chips for some of the dark colors. This wasnecessary to retain color accuracy within the system of notationused in the chart.
5R 8/25R 7/4Grayish PinkModerate Pink5R 4/65R 3/4Moderate Red10R 6/2Pale Red10R 2/2Very DuskyRed5YR 4/4Moderate Brown5R 6/2Pale Red5R 6/6Light Red5R 5/45R 4/2Moderate RedGrayish RedDusky RedBlackish RedVery Dark RedGrayish OrangePink10R 8/210R 7/410R 6/610R 5/410R 4/210R 4/610R 3/45YR 7/25YR 6/45YR 3/45YR 2/2 10YR 8/2 10YR 8/6Moderate ReddishOrange5Y 8/4Moderate OrangePink5Y 3/2Grayish Brown5R 2/2Pale ReddishBrownGrayish OrangePinkModerate Brown5R 2/6Grayish RedLight BrownDusky BrownModderateReddish BrownModerateOrangePinkDark ReddishBrown5YR 5/2 5YR 5/6Pale BrownVery PaleOrangeLight BrownPale YellowishOrange10YR 7/4 10YR 6/2 10YR 6/6 10YR 5/4 10YR 4/2 10YR 2/2Grayish Orange5Y 8/4Grayish YellowPale YellowishBrownDark YellowishOrange5Y 7/25Y 7/6Yellowish GrayModerateYellowModerateYellowish BrownDark YellowishBrownDusky YellowishBrown5Y 6/45Y 5/25Y 5/6Dusky YellowLight OliveGrayLight OliveBrown
Rock-Color Chart2009 Revision
5Y 4/45Y 3/210Y 8/210Y 5/410Y 4/25GY 7/2Moderate OliveBrownLight OliveOlive GrayGrayish OlivePale GreenishYellowGrayish YellowGreen10Y 7/4ModerateGreenish Yellow10Y 6/2Pale Olive10Y 6/6Dark GreenishYellow5GY 7/4 5GY 5/2 5GY 3/2ModerateYellow GreenDusky YellowGreenGrayish OliveGreen10GY 7/2 10GY 6/4 10GY 5/2 10GY 4/4 10GY 3/2Pale YellowishGreenModerateYellowish Green5G 7/25G 7/4Light GreenBrilliant Green10G 8/210G 6/210G 4/25BG 4/65BG 3/25PB 7/25PB 5/2Pale GreenVery PaleGreenModerate BlueGreenPale BluePale GreenDusky BlueGreenGrayish BlueGrayish GreenDark YellowishGreenDusky YellowishGreen5G 6/65G 5/25G 5/6Grayish GreenModerateYellow GreenModerateGreen5BG 7/2 5BG 6/6 5BG 5/2Pale BlueGreenLight BlueGreen5B 8/25B 7/65B 6/25PB 3/25P 6/2Very PaleBlueDusky Blue5G 3/2Dusky GreenLight BluePale PurpleGrayish BlueGreen5B 5/6Pale BlueModerate Blue5P 4/25P 2/2Grayish PurpleVery DuskyPurple
Rock-Color Chart2009 Revision
5RP 8/2Pale Pink5B 9/15RP 6/25RP 4/25G 8/15GY 8/1Pale RedPurpleGrayish RedPurpleBluish WhiteLight GreenishGray5YR 6/15Y 6/1Light OliveGrayGreenish Gray5GY 4/15Y 4/15YR 4/1Light BrownishGrayDark GreenishGrayOlive Gray5RP 2/2Very DuskyPurple5Y 8/1Light GreenishGrayYellowish Gray5G 6/15GY 6/1Brownish Gray5YR 8/1Pinkish Gray5B 5/15B 7/1Light BluishGray5G 4/1Greenish GrayMedium BluishGrayDark GreenishGray5G 2/15GY 2/15Y 2/1Greenish BlackGreenish BlackOlive Black5YR 2/1BrownishBlackN9WhiteN3Dark GrayN8Very LightGrayN2GrayishBlackN7Light GrayN1BlackN6Medium LightGrayN5Medium GrayN4Medium DarkGray
Rock-Color Chart2009 Revision
Refining the science of Color.To define color through precise color validation systems,contact Munsell Color at 877-888-1720 or visit munsell.com.
Accordingly, the Rock-Color Chart includes colors as far as possible into the dark range in order to cover wet specimens as well as dry. For the first time, the chart includes glossy chips for some of the dark colors. This was necessary to retain color accuracy within the system of notation used in the chart.File Size: 275KBPage Count: 12
