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Caption: This chart shows the median (d50) substrate particle-size from bed core samples in Lagunitas Creek riffles at monitoring sites between San Geronimo Creek to Devils Gulch. Data were collected during the summer or fall for years 1980 to 2000 by Balance Hydrologics, Inc. for the Marin Municipal Water District. Bed core samples were not taken in locations where spawning might occur and are not intended to characterize spawning conditions (Prunuske Chatham, Inc., 2000). See the chart table caption for site names. See Map to view sediment sampling locations and Info Links for more information.
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