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Scotchman's Gulch - -- Plant Growth Medium Discussion with <br />• Reference to Evaluation of Alluvial Valley Floors <br />Introduction <br />A site visit to examine questions related to assessment of the nature of Scotchman's <br />Gulch relative to Alluvial Valley Floor characteristics was conducted on 9/23/09. The <br />transact indicated in Figure 1 was examined at the five locations as shown. <br />Soil Parent Material <br />In the valley bottom associated with Scotchman's Gulch, the unconsolidated material <br />present does not provide direct evidence of having been stream -laid. The undulant <br />contacts between materials (Photost and 2) may suggest that the material was <br />transported by side -slope alluvial /colluvial (probably mudflow) processes. Thus, in <br />aggregate, the material may be a coalescence of lobes of fine - textured material flowing <br />from the nearby upland slopes. The present upper surface has likely been somewhat <br />leveled by stream action. <br />• <br />0 <br />• <br />Photo 1. Scotchman's Gulch profile exposed along current channel <br />