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<br />3.5 <br /> <br />EXPLANATION OF FIGURE 3.3. <br /> <br />A - Block-boulder deDosits. Includes talus and rock glacier deposits. <br />Consists of loosely unsorted to wedged angular rock fragments ranging in <br />diameter from 1 inch to several feet. Deposits tend to be unstable. <br /> <br />B - Unconsolidated sand and silt with cobbl~!s and boulders. INcludes glacial <br />dri ft and all uvi a 1 fan depos its. Cons i sts of unsorted clay, silt, sand, <br />gravel, and subangular to rounded cobbles -and boulders. The deposit <br />located in the lower portion of the Cornet CrE!ek watershed exhibits <br />unstable slopes where dissected by the creek. <br /> <br />C - <br /> <br />Sedimentary bedrock. Incl udes mappE!d geo 1 ogi c units <br />fractured limestone, shale, mudstone, and sandstone. <br />deposits is readily eroded. <br /> <br />consisting of <br />Th is group of <br /> <br />o - Sedimentary bedrock. Includes a mapped geologic units consisting of well- <br />cemented sandstone, siltstone, and conglomerate with some shale and <br />mudstone interbeds. The geologic units in this group are resistant to <br />erosion and form cliffs and ledges. <br /> <br />E - Volcanic rock. Includes a light--colored high-Iy fractured and slabby <br />volcanic rock unit and a dark-colored, hard and erosion-resistant volcanic <br />rock. Both types commonly form cl iffs_. <br /> <br />F - Volcanic conQlomerate. Includes a hard and erosion-resistant unit <br />containing pebbles, cobbles, and boulders of crystall ine rock in a yery <br />fine matrix. locally forms cliffs. <br />