Laserfiche WebLink
<br />TABLE A.6 <br />Fracture Spacing Descriptors <br />JOINT OR FRACTURE <br />SPACING DESCRIPTOR <br />TRUE SPACING <br />Extreme) wide) spaced Greater than 10 ft >3 m <br />Very wide) spaced 3 to 10 ft 1 to 3 m <br />Wide) spaced 1 to 3 ft 300 mm to 1 m <br />Moderately spaced 0.3 to 1 ft 100 to 300 mm <br />Close) spaced 0.1 to 0.3 ft 30 to 100 mm) <br />Very closely spaced Less than 0.1 ft (<30 mm) <br />TABLE A.7 <br />Fracture Openness Descriptors <br />0) <br />DESCRIPTOR OPENNESS <br />Tight No visible separation <br />Slightly Open Less than 0.003 ft 1/32 in <1 mm) <br />Moderately Open 0.003 to 0.01 ft 1/32 to 1/8 in 1 to 3 mm <br />Open 0.01 to 0.03 ft 1/8 to 3/8 in 3 to 10 mm) <br />Moderately Wide 0.03 ft 3/8 in to 0.1 ft 10 to 30 mm <br />Wide Greater than 0.1 ft (> 30 mm) (record actual openness] <br />TABLE A.8 <br />Fracture Roughness Descriptors <br /> <br />DESCRIPTOR CRITERIA <br />Stepped Near-normal steps and ridges occur on the fracture surface. <br /> <br />Rough Large, angular asperities can be seen. <br /> <br />Moderately Rough Asperities are clear) visible and fracture surface feels abrasive. <br /> <br />Slightly Rough Small asperities on the fracture surface are visible and can be felt. <br /> <br />Smooth No asperities, smooth to the tough. <br /> <br />Polished Extremely smooth and shiny. <br />GEI Consultants, Inc.