![]() | Colorado State Highway 93 |
Tom Schweich |
![]() Topics in this Article: Literature Cited |
From Boulder to Golden. | ||||||||||||||||||||||||||||||||||||||||||||||||||
Junction: State Highway 119
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Junction: State Highway 170
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Other articles: Colorado State Highway 128 at CO 93
Junction: State Highway 128, W. 120th Avenue.
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One to two miles to the east is Section 3 from where there is a single collection of Frasera speciosa.
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Locations: Rocky Flats.
| Rocky FlatsRocky Flats stretch for 3 miles north to south, on the east and west sides of the highway. I have seen some references to the “Rocky Flats pediment.” However, it looks more an alluvial fan at the mouth of Coal Creek Canyon.
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Locations: Rocky Flats National Wildlife Refuge.
| Rocky Flats National Wildlife Refuge
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Other articles: Colorado Highway 72 at CO 93
Junction: State Highway 72, west to Coal Creek Canyon.
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Other articles: County Road 284 at CO 93
Junction: W. 58th Avenue, east only, to to W. 60th Avenue
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Other articles: W. 56th Avenue at CO 93 Locations: White Ranch Park.
Junction: W. 56th Avenue, west only, to White Ranch Park.
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Locations:
Ramstetter Reservoir.
Ramstetter Reservoir east of highway.
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Other articles: Golden Checklist Flora dev. trlhds. North Table Loop at N Table Mtn Locations:
North Table Mountain Park.
North Table Mountain Trailhead. Access to North Table Mountain from the west side.
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Other articles: Field Notes 6 Apr 2017 Locations:
Golden.
| City of Golden below …
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Other articles: Ford Street at CO 93 Pine Ridge Road at CO 93
Junction: Wyoming Circle, to N. Ford Street.
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Other articles:
Tucker Gulch Trail
at CO 93
Golden Gate Canyon Road
at CO 93
Junction: Golden Gate Canyon Road, County Road 70
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Other articles:
Washington Avenue
at CO 93
Field Notes
8 Oct 2014
Junction: Washington Avenue
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Other articles:
Iowa Street
at CO 93
Field Notes
8 Oct 2014
Junction: Iowa Drive, west into Mountain Ridge subdivision, east towards Washington Avenue and Iowa Street.
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Bicycle bridge crosses the highway.
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Literature Cited:
The highway passes near the center of the NE1/4 SW1/4 Sect 28, T3S, R70W.
| Somewhere in this quarter-quarter section are the locations of two trenches dug to explore a small graben of Quaternary age, thought to be related to the Golden fault. Excavations revealed a complex geologic picture suggesting two periods of fault rupture with a total of 5.5 m of displacement. Dating of zircons and glass shards from an ash deposited in the graben and disrupted by faulting yielded dates of 0.6 to 0.7 million years, suggesting faulting occurred more recently than those dates (Kirkham, 1977).
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Literature Cited:
Other articles: Field Notes 17 Aug 2014 Locations: Magpie Gulch.
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Field Trip Stop 14 — Highway 6-58-93 Junction — of Noe, et al. (1999) illustrates the Golden Fault, associated landslide hazards, mitigation of landslide hazards, and the short public memory. Looking to the north and south, we can see the distinctive hogback of the Dakota Sandstone at both ends of the valley. But why is this hogback missing at the valley center? The answer is that the Golden Fault, a large, Laramide thrust fault, weaves along the valley just to the east of the mountain front. Here, the fault has displaced nearly 8,000 feet of the Paleozoic and Mesozoic, sedimentary section (Van Horn, 1976). The trace of the fault can be seen as it cuts up the side of the first large alluvial terrace to the south of Clear Creek. There is a distinct break in the vegetation between the Fountain Formation to the west (covered with mountain mahogany shrubs) and the Pierre Shale to the east (covered with grasses).
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Junction:
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| Literature CitedA list of all literature cited by this web site can be found in the Bibliography. |
Kirkham, Robert M. 1977. Quaternary movements on the Golden fault, Colorado. Geology. 5: 689-692. {TAS-pdf}
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Noe, David C., James M. Soule, Jeffrey L. Hynes and Karen A. Berry. 1999. Bouncing boulders, rising rivers, and sneaky soils: A primer of geologic hazards and engineering geology along Colorado's Front Range. Field Guides. 1: 1-19. Boulder, CO: Geological Society of America, 1999. {TAS-pdf}
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Date and time this article was prepared: 2/14/2019 12:01:19 PM |