Updated April 20, 2008
(Line numbers do not include blank lines or headers.)
Cover -- Printer moved the Jm label (for Morrison Formation). It should be placed one drainage (1") to the left.
page 6, note -- Change 325 Ma to 318 Ma and 39 My to 19 My.
page 11, line 19 -- Change 501 Ma to 488 Ma.
page 23, Figure 2-4 -- Change "Benton Formation" to "Benton Group."
Make Benton description read: "Dark gray platy shale with expansive clay layers."
Make Morrison description read: "Silty sandstone and mudstone."
Add to Lykins description, "Some sandstone layers show cross stratification from stream deposition."
page 34, line 20 -- Change 2-billion-year to 1½-billion-year.
page 35, line 12 -- Change 280 Ma to 299 Ma.
page 46, line 5 -- Change Figure 4-1 to Figure 4-2
page 47, line 20 -- Change Figure 4-2 to Figure 4-3.
page 48, line 11 -- Change Figure 4-2 to Figure 4-3.
page 53, following line 9 add paragraph -- "A number of diatremes, which are explosive volcanic pipes that eject material from deep in the mantle, formed kimberlites (mineral assemblages derived from the mantle) toward the Wyoming border (see page 58). One of these kimberlites can be found on Green Mountain west of Boulder and it has been dated recently from the Late Proterozoic (Lester et al. 2001)."
page 60, last two lines -- Make read, "The diatremes were long thought to be Devonian in age, but more recent research indicates that at least the one west of Boulder dates back to the Proterozoic. The northern ones may be Devonian or may have been reactivated in the Devonian (Lester et al. 2001). No Devonian fossils have been found in them. Because the Green Mountain diatreme west of Boulder dates from the Proterozoic, its lack of Paleozoic sedimentary rocks leaves the question of whether they once existed here open."
page 67, line 33 -- Change Figure 6-2 to Figure 6-3.
page 73, line 34 -- Change Figure 6-2 to Figure 6-3.
pages 80, 82 -- In Figures 7-1 and 7-2, the 40th parallel should be drawn farther north to pass through Boulder.
page 89, next-to-last line in main text -- Change 144 Ma to 148 Ma.
page109 -- insert at end of paragraph on Smoky Hill Shale, "The Smoky Hill contains fossils of foraminifera, which are visible in the limestone layers as small black specks in some locations. With a hand lens, you can see that each of these looks like a spiral of black beads. Foraminifera (forams) are a varied group of organisms in the kingdom Protista."
page 121, line 12 -- Change Figure 97 to Figure 9-8.
page 123, line 7 -- insert " Kittleson (2004) disputes the explanation of these faults as growth faults on the basis of structural mapping of the Fox Hills, Laramie, and upper Pierre at a number of locations in the Boulder-Weld fault zone. He contends that they are faults induced by the thrust faulting at the beginning of the Laramide orogeny."
page 126, line 3 -- Insert at end of paragraph, "Margins of error make this sequence tentative, not conclusive."
page 129, line 9 -- Change "north south" to north-south."
page 130, line 33 -- Change "65-55.5" to "65.5-55.8."
line 34 -- Change "55.5-33.7" to "55.8-33.9."
page 132, line 19 -- Change "Figure FT15-WP3 [page 270]" to "Figure FT15-WP8 [page 272]."
page 134, note -- Add "See erratum for page 377."
page 135, line 30 -- Fix spelling of "Paleocene."
page 150, line 14 -- Change "glacial" to "interglacial."
page 150, line 16 -- Change "Between" to "During."
page 152, line 11 -- Change "glaciation" to "interglaciation."
page 152, line 17-18 -- Change "glaciation" to "interglaciation."
page 158, Silver plume Granite, line 2, change "FT1" to "FT10."
Fountain Formation, line 2, change "T16" to "FT16."
page 182, line 8 -- Change "Benton Formation" to "Benton Group."
line 32 -- Change "6 inches" to "4 inches."
page 194, line11 -- Make read "It was probably formed as a shelf deposit by storms..."
page 198, line 24 -- Change "formation" to "intrusion."
pages 204, 205 -- Change waypoint
|
WP 8 |
13T 474689 |
N 40° 09' 23.2" |
|
|
UTM 4444842 |
W 105° 17' 49.8" |
pages 212, 214 -- Change waypoint
|
WP 15 |
13T 0474923 |
N 40° 10' 30.5" |
|
|
UTM 4447029 |
W 105° 17' 40.3" |
page 216, line 17 -- Change "Formation" to "Group."
line 34 -- Change "six" to "four."
page 220, line 8 -- Change "50" to "30."
page 247, line 8 -- Change "waling" to "walking."
page 248, line 12 -- Make read "than this exposure and on the south side of this canyon, up the hill."
line 15 -- Change "possible" to "probable."
page 266, bottom of page and footnote, add paragraph, "Probably the best explanation is that of Bob Raynolds, that there is nothing surprising at all. Since the Fox Hills intergrades with the Laramie at the top, and is deposited in the typical overlapping pulses of a regressive sequence, as well as lateral variations due to deltas, it is to be expected that there are much thicker and thinner segments, and the coal sequence is simply an interleaved interval of Laramie (swamp) deposition."
page 273, line 14 -- change "miles" to "mile."
page 275, line 36 -- Make read "influenced oxidation or subsequent reduction."
page 276, line 3 -- Change "landslide" to "slump."
page 288, line 5 -- Change "is" to "in."
page 293, line 1 -- Change "they" to "the."
page 302, line 7 -- Change "Figure 11-1" to "Figure 11-2."
page 307, line 9 -- Change "at" to "and."
page 309, line 22 -- Add "fizz" at the end of the line.
pages 321-328 -- A new trailhead has been built. A revised version of the field trip leaving from this trailhead will be published in the Extras tab when the trail changes in the Doudy Draw area are complete.
page 325, line 6 from bottom -- Change "horst" to "graben."
pages 329-341 -- The designated trails in this area are being rerouted by City Open Space and Mountain Parks (4/20/2008). A new version of this field trip will be posted in the Extras tab as soon as the trails are complete.
page 344, lines 28-29, make read, "The Slocum is dated at 190,000 ± 50,000 years old (Birkeland et al. 1996).
page 344, last line -- Change "Figure 9-7" to "Figure 9-8."
page 345, line 2 -- Make read "southwest to northeast."
page 346, line 5 -- Change "more than ten" to "seven."
page 350 and 351 -- Change 2nd line of WP7 table to UTM 4415390 W 105° 19' 48.6"
page 358 -- Updated geology links are available here.
page 364, end -- Add "3) conditions for fossil preservation extend over greater distances in marine strata."
page 368, line 1 -- Make read "depositing sediment in channels."
page 377, add paragraph 3 -- "Note that there is a secondary form of radiometric dating, fission-track dating (often known as AFT for apatite fission track dating). Rather than studying the daughter products of radioactive decay, it looks at the closing (annealing) of tracks produced by high-energy particles. The technique is used to determine the chronology of uplifts, and it shows great promise for analyzing the timing of sediment deposition in the Denver Basin, as reported in a recent issue of Rocky Mountain Geology by Shari A. Kelley."
page 388, line 18 -- Make read "B-9 runs along the convex upper surface of the Fort Hayes."
page 391, lines 4-5 -- Change "northeast" to "northwest."
page 440, add reference -- "Kittleson, Kendall L., 2004, The Effect of Reverse Faulting on the Thickness, Depth, and Water Quality of the Laramie-Fox Hills Aquifer in the Western Denver Basin, Colorado. Mountain Geologist, v.41, no. 4, pp. 185-194."
page 441, add reference -- "Lester, Alan P., Edwin E. Larson, G. Lang Farmer, Charles R. Stern, and Jonathon A. Funk, 2001, Neoproterozoic Kimberlite Emplacement in the Front Range, Colorado. Rocky Mountain Geology, v. 36, no. 1, pp. 1-12."
page 453, change index entry to read "alluvial deposits, dating, 151"
page 466, change index entry to read "Rocky Flats alluvium, age of, 151, 302."
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