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i <br /> Table 1 (concluded) <br /> KEY TO ROCK DISCONTINUITY SURVEY TABLE <br /> i <br /> i <br /> i <br /> I <br /> DISCONTINUITY DESCRIPTORS <br /> as Dip of fracture surface measured relative to horizontal <br /> ❑b Discontinuity Type: ❑e Amount of Infilling: - ❑h Discontinuity Spacing (feet): <br /> F - Fault Su - Surface Stain EW - Extremely Wide (>6) <br /> J - Joint Sp - Spotty W - Wide (2-6) <br /> Sh - Shear Pa - Partially Filled M - Moderate (0.7-2) <br /> Fo - Foliation Fi - Filled C - Close (0.2-0.7) <br /> V - Vein No - None VC - Very Close (<0.2) <br /> B - Bedding <br /> �c Discontinuity Width (inches): ❑f Surface Shape of Joint: <br /> W - Wide (0.5-2.0) We - Wavy <br /> MW- Moderately Wide (0.1-0.5) PI - Planar <br /> N - Narrow (0.05-0.1) St - Stepped <br /> VN - Very Narrow (<0.05) Ir - Irregular <br /> T - Tight (0) <br /> ad Type of Infilling: ❑g Roughness of Surface: <br /> ICl - Clay Slk - Slickensided [surface has smooth,glassy finish with visual <br /> Ca - Calcite evidence of striations] <br /> Ch - Chlorite S - Smooth [surface appears smooth and feels so to the touch] <br /> Fe - Iron Oxide SR - Slightly Rough [asperities on the discontinuity surfaces are <br /> Gy - Gypsum/Talc distinguishable and can be felt] <br /> H - Healed R - Rough [some ridges and side-angle steps are evident;asperities <br /> No - None are clearly visible,and discontinuity surface feels very abrasive] <br /> Py - Pyrite VR - Very Rough [near-vertical steps and ridges occur on the <br /> Qz - Quartz discontinuity surface] <br /> Sd - Sand <br /> ROCK WEATHERING /ALTERATION <br /> Description Recognition <br /> Residual Soil Original minerals of rock have been entirely decomposed to secondary minerals,and <br /> original rock fabric is not apparent;material can be easily broken by hand <br /> Completely Weathered/Altered Original minerals of rock have been almost entirely decomposed to secondary minerals, <br /> minerals,although original fabric may be intact;material can be granulated by hand <br /> Highly Weathered/Altered More than half of the rock is decomposed;rock is weakened so that a minimum <br /> 24 ch-diameter sample can be broken readily by hand across rock fabric <br /> Moderately Weathered/Altered Rock is discolored and noticeably weakened,but less than half is decomposed;a <br /> minimum 2-inch-diameter sample cannot be broken readily by hand across rock fabric <br /> Slightly Weathered/Altered Rock is slightly discolored,but not noticeably lower in strength than fresh rock <br /> Fresh Rock shows no discoloration,loss of strength,or other effect of weathering/alteration <br /> I <br /> i <br /> i <br /> Woodward-Clyde Consultants <br />