David Ponce (Former Employee)
Science and Products
Filter Total Items: 119
Gravity, magnetic, and physical property data in the Smoke Creek Desert area, northwest Nevada Gravity, magnetic, and physical property data in the Smoke Creek Desert area, northwest Nevada
The Smoke Creek Desert, located approximately 100 km (60 mi) north of Reno near the California-Nevada border, is a large basin situated along the northernmost parts of the Walker Lane Belt (Stewart, 1988), a physiographic province defined by northwest-striking topographic features and strike-slip faulting. Because geologic framework studies play an important role in understanding the...
Authors
Janet E. Tilden, David A. Ponce, Jonathan M. G. Glen, Bruce A. Chuchel, Kira Tushman, Alison Duvall
Subsurface structure of the East Bay Plain ground-water basin: San Francisco Bay to the Hayward fault, Alameda County, California Subsurface structure of the East Bay Plain ground-water basin: San Francisco Bay to the Hayward fault, Alameda County, California
The area of California between the San Francisco Bay, San Pablo Bay, Santa Clara Valley, and the Diablo Ranges (East Bay Hills), commonly referred to as the 'East Bay', contains the East Bay Plain and Niles Cone ground-water basins. The area has a population of 1.46 million (2003 US Census), largely distributed among several cities, including Alameda, Berkeley, Fremont, Hayward, Newark...
Authors
R. D. Catchings, J. W. Borchers, M. R. Goldman, G. Gandhok, D. A. Ponce, C. E. Steedman
Seismic reflection evidence for a northeast-dipping Hayward fault near Fremont, California: Implications for seismic hazard Seismic reflection evidence for a northeast-dipping Hayward fault near Fremont, California: Implications for seismic hazard
A 1.6-km-long seismic reflection profile across the creeping trace of the southern Hayward fault near Fremont, California, images the fault to a depth of 650 m. Reflector truncations define a fault dip of about 70 degrees east in the 100 to 650 m depth range that projects upward to the creeping surface trace, and is inconsistent with a nearly vertical fault in this vicinity as previously...
Authors
R. A. Williams, R.W. Simpson, R.C. Jachens, W. J. Stephenson, J. K. Odum, D. A. Ponce
Gravity and magnetic data along a seismic refraction-reflection line in northwest Nevada and northeast California Gravity and magnetic data along a seismic refraction-reflection line in northwest Nevada and northeast California
No abstract available.
Authors
Janet E. Tilden, David A. Ponce, Jonathan M. G. Glen, Kathleen D. Gans
Three-dimensional geologic map of the Hayward fault, northern California: Correlation of rock unites with variations in seismicity, creep rate, and fault dip Three-dimensional geologic map of the Hayward fault, northern California: Correlation of rock unites with variations in seismicity, creep rate, and fault dip
In order to better understand mechanisms of active faults, we studied relationships between fault behavior and rock units along the Hayward fault using a three-dimensional geologic map. The three-dimensional map-constructed from hypocenters, potential field data, and surface map data-provided a geologic map of each fault surface, showing rock units on either side of the fault truncated...
Authors
R. W. Graymer, D. A. Ponce, R.C. Jachens, R.W. Simpson, G. A. Phelps, C. M. Wentworth
Isostatic residual gravity map of The Santa Clara Valley and vicinity, California Isostatic residual gravity map of The Santa Clara Valley and vicinity, California
No abstract available.
Authors
Carter W. Roberts, Robert C. Jachens, David A. Ponce, Victoria E. Langenheim
Science and Products
Filter Total Items: 119
Gravity, magnetic, and physical property data in the Smoke Creek Desert area, northwest Nevada Gravity, magnetic, and physical property data in the Smoke Creek Desert area, northwest Nevada
The Smoke Creek Desert, located approximately 100 km (60 mi) north of Reno near the California-Nevada border, is a large basin situated along the northernmost parts of the Walker Lane Belt (Stewart, 1988), a physiographic province defined by northwest-striking topographic features and strike-slip faulting. Because geologic framework studies play an important role in understanding the...
Authors
Janet E. Tilden, David A. Ponce, Jonathan M. G. Glen, Bruce A. Chuchel, Kira Tushman, Alison Duvall
Subsurface structure of the East Bay Plain ground-water basin: San Francisco Bay to the Hayward fault, Alameda County, California Subsurface structure of the East Bay Plain ground-water basin: San Francisco Bay to the Hayward fault, Alameda County, California
The area of California between the San Francisco Bay, San Pablo Bay, Santa Clara Valley, and the Diablo Ranges (East Bay Hills), commonly referred to as the 'East Bay', contains the East Bay Plain and Niles Cone ground-water basins. The area has a population of 1.46 million (2003 US Census), largely distributed among several cities, including Alameda, Berkeley, Fremont, Hayward, Newark...
Authors
R. D. Catchings, J. W. Borchers, M. R. Goldman, G. Gandhok, D. A. Ponce, C. E. Steedman
Seismic reflection evidence for a northeast-dipping Hayward fault near Fremont, California: Implications for seismic hazard Seismic reflection evidence for a northeast-dipping Hayward fault near Fremont, California: Implications for seismic hazard
A 1.6-km-long seismic reflection profile across the creeping trace of the southern Hayward fault near Fremont, California, images the fault to a depth of 650 m. Reflector truncations define a fault dip of about 70 degrees east in the 100 to 650 m depth range that projects upward to the creeping surface trace, and is inconsistent with a nearly vertical fault in this vicinity as previously...
Authors
R. A. Williams, R.W. Simpson, R.C. Jachens, W. J. Stephenson, J. K. Odum, D. A. Ponce
Gravity and magnetic data along a seismic refraction-reflection line in northwest Nevada and northeast California Gravity and magnetic data along a seismic refraction-reflection line in northwest Nevada and northeast California
No abstract available.
Authors
Janet E. Tilden, David A. Ponce, Jonathan M. G. Glen, Kathleen D. Gans
Three-dimensional geologic map of the Hayward fault, northern California: Correlation of rock unites with variations in seismicity, creep rate, and fault dip Three-dimensional geologic map of the Hayward fault, northern California: Correlation of rock unites with variations in seismicity, creep rate, and fault dip
In order to better understand mechanisms of active faults, we studied relationships between fault behavior and rock units along the Hayward fault using a three-dimensional geologic map. The three-dimensional map-constructed from hypocenters, potential field data, and surface map data-provided a geologic map of each fault surface, showing rock units on either side of the fault truncated...
Authors
R. W. Graymer, D. A. Ponce, R.C. Jachens, R.W. Simpson, G. A. Phelps, C. M. Wentworth
Isostatic residual gravity map of The Santa Clara Valley and vicinity, California Isostatic residual gravity map of The Santa Clara Valley and vicinity, California
No abstract available.
Authors
Carter W. Roberts, Robert C. Jachens, David A. Ponce, Victoria E. Langenheim
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government