| Abstract: | Seismic-refraction surveys were made across suspected buried drift-filled bedrock valleys believed to occur near two sites of known groundwater contamination--the Twin Cities Army Ammunition Plant (TCAAP) near New Brighton and the former Koppers Coke Plant, in St. Paul, Ramsey County, Minnesota. Refraction data were collected along two lines at each site; each line traversed the axis of a suspect valley. Drift-filled bedrock valleys were though to incise the Prairie du Chien-Jordan aquifer to an altitude between 500 and 560 ft above sea level at the TCAAP site. The interpretation of one seismic profile indicates that a valley probably does not exist under the area surveyed; the modeled depth profile shows the bedrock surface ranging between altitudes of about 700 to 780 ft. Interpretation of a second seismic profile just south of the TCAAP indicates that a shallow valley may exist under the northern half of the line; the modeled depth profile shows that the bedrock surface declines from an altitude of about 780 ft to about 690 ft over a horizontal distance of 400 ft. (USGS) |
| Genre: | USGS Numbered Series |
| ProdID: | 30584 |
| Citation Author: | Woodward, D. G. |
| Citation Contributing Office: | |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | - |
| Citation Editor: | |
| Citation End Page: | |
| Citation Issue: | |
| Citation Keywords: | |
| Citation Language: | ENGLISH |
| Citation Larger Work Title: | |
| Citation LatN: | |
| Citation LatS: | |
| Citation LonE: | |
| Citation LonW: | |
| Citation Month: | |
| Citation No Pagination: | |
| Citation Number Of Pages: | |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | iv, 20 p. :ill., maps ;28 cm. |
| Citation Projection: | |
| Citation Public Comments: | |
| Citation Publisher: | U.S. Geological Survey, |
| Citation Series: | Water-Resources Investigations Report |
| Citation Series Code: | WRI |
| Citation Series Number: | 85-4107 |
| Citation Search Results Text: | Seismic-refraction study of suspected drift-filled bedrock valleys in Ramsey County, Minnesota; 1985; WRI; 85-4107; Woodward, D. G. |
| Citation Start Page: | |
| Citation Volume: | |
| Citation Year: | 1985 |
| Type: | citation/reference |
| Text: | Seismic-refraction study of suspected drift-filled bedrock valleys in Ramsey County, Minnesota; 1985; WRI; 85-4107; Woodward, D. G. |
| URL (THUMBNAIL): | http://pubs.usgs.gov/wri/1985/4107/report-thumb.jpg |
| URL (DOCUMENT): | http://pubs.usgs.gov/wri/1985/4107/report.pdf |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
| Publisher: | U.S. Geological Survey, |
