Copyright {U.S. Geological Survey, 2005, SIR2005-5087, Public Domain} Media {SIR2005-5087-Fig7.avi} Metrics {time:ms; duration: 39600;} Spec {MSFT:1.0;}

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Figure 7 is a computer-generated three-dimensional box plot of all radar reflectors identified in single-hole reflection radar logging in MW10 from Machiasport, Maine.

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The box plot is used to aid in the visualization of radar reflectors.

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The video demonstrates how computer software allows the user to rotate or tip the cube and see the reflectors from multiple perspectives.

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In this representation, the borehole-radar reflectors are shown as disk-shaped planar features with a uniform diameter of 15 meters.

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The dimensions of the cube are 200 by 150 by 150 meters.

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The upper surface of the cube, which is shaded, represents the land surface.

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The northern side of the cube and magnetic north are indicated with a line on the northern side of the cube.

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Only reflectors whose strike and dip could be determined were included in the representation.

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The reflectors are color coded.

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Green disks in the cube plot represent radar reflectors that project to above the top of the open hole.

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Yellow disks in the cube plot represent radar reflectors that project to below the casing in the boreholes.

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Red and blue disks represent radar reflectors that could only be resolved to plus or minus 180 degrees.

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The video clip starts with view looking down on the top of the box, which represents the land surface.

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Then the box is tipped so that the land surface is horizontal and we are able to see the radar reflectors from the southern side of the box.

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As the box is rotated towards the west, the reflectors are viewed from all sides.

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The figure shows that the radar imaged numerous reflectors that intersect a line parallel to the borehole (including segments above and below the open borehole), and these reflectors appear to be uniformly distributed with depth.

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The disks above the land surface indicate that the radar imaged several reflectors in the bedrock away from the borehole, and not just features that intersect the open part of the borehole.