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SENECA MINE
<br />I_OG OF BOREHOLE
<br />Bore Hole: M3-GW-544 Date/Time: Start: 7/30/81 PM Finish: 8/1/81 PM
<br />Project: 0260 Location: NW-SE Section 12, TSN, R87W,
<br />Routt County, Colorado
<br />Logged By: Hammond/Park Driller: Don Clemmens
<br />Surface Elevation: 7112.2' Rig Type: CFD15
<br />Total Depth: 116.0' Borehole Diameter: 5-I/8"
<br />Bit Types: 39n" Rock/Diamond it Drilling Fluid: Air to 12.5', water to 116.0'
<br />Geophysical Logs: NG, GG, N, R, :iP, C, T
<br />GG also done after well completion
<br />DEPTH DESCRIPTION AND COMMENTS
<br />
<br />USED PUSH BAF2REL TO 10', CORE DIAMETER 3"
<br />CORE BARREL FROM 10' TO TOTAL DEPTH; DIAMETER 2-I/8"
<br />0 to 2.3' Soil -Brown, It. brown, lighter color w/depth, massive, friable, some •
<br />roots in part, gypsum deposits (reaction to HCI), sandy in part, organic
<br />matter in part. Clay-ribbons, becomes more shaley with depth,
<br />limonite staining in part at approximately 9".
<br />2.3 to 4.1 Soil -Dark brown to grayish brown, friable to low hardness, roots in
<br />part, fine grained, shale in part, fine sand in part, clay-ribbons, gypsum
<br />deposits in part, limonite staining and gypsum at approximately 3.7',
<br />shall increases with depth (highly fractured with indense limonite
<br />staining; calcite deposits in part), some carbonaceous deposits.
<br />4.1 to 12.5 Shale/Soil -Brown, gray, black, friable to low hardness, very fine to
<br />fine grained, frizility part, low clay content (doesn't ribbon), highly
<br />fractured in part with intense limonite staining, gypsum deposits in
<br />part, low sand content, carbonaceous deposits in part. Highly
<br />fractured, stained shale between ± 6.6' to ± 7.1' and 7.7'to 8.0',lighter
<br />in color with depth after 8'. Limonite staining decreases after 9.9'.
<br />Sandstone tense 11.2' to 11.4' (light gray).
<br />12.5 to 20.4 LosT
<br />20.4 to 21.7 Shale -Dark gray to black, very fine grained, low hardness, some small
<br />fractures, light limonite staining.
<br />21.7 to 23.3 Lost
<br />~J
<br />6-37e
<br />NOV 2 3 t98t
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