Measurement of ridge-spreading movements (Sackungen) at Bald Eagle Mountain, Lake County, Colorado, II: Continuation of the 1975-1989 measurements using a Global Positioning System in 1997 and 1999
Open-File Report
2000-205
By: David J. Varnes, J. A. Coe, J. W. Godt, W. Z. Savage, and J. E. Savage
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Abstract
Measurements of ridge-spreading movements at Bald Eagle Mountain in north-central Colorado were reported in USGS Open-File Report 90-543 for the years 1975-1989. Measurements were renewed in 1997 and 1999 using the Global Positioning System (GPS). Movements are generally away from a ridge-top graben and appear to be concentrated along 3 or 4 trenches with uphill facing scarps that are parallel with slope contours. A point just below the lowest trench has moved the most? a total of 8.3 cm horizontally and slightly downward from 1977 to 1999 relative to an assumed stable point on the periphery of the graben. Movements from 1997 to 1999 are less than 1 cm or within the error of measurement.
Suggested Citation
Varnes, D., Coe, J.A., Godt, J., Savage, W.Z., Savage, J.E., 2000, Measurement of ridge-spreading movements (Sackungen) at Bald Eagle Mountain, Lake County, Colorado, II: Continuation of the 1975-1989 measurements using a Global Positioning System in 1997 and 1999: U.S. Geological Survey Open-File Report 2000-205, 23 p., https://doi.org/10.3133/ofr00205.
ISSN: 2331-1258 (online)
Study Area
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Measurement of ridge-spreading movements (Sackungen) at Bald Eagle Mountain, Lake County, Colorado, II: Continuation of the 1975-1989 measurements using a Global Positioning System in 1997 and 1999 |
| Series title | Open-File Report |
| Series number | 2000-205 |
| DOI | 10.3133/ofr00205 |
| Year Published | 2000 |
| Language | English |
| Publisher | U.S. Geological Survey, |
| Description | 23 p. |
| Country | United States |
| State | Colorado |
| County | Lake County |
| Other Geospatial | Bald Eagle Mountain |