Geophysical Surveys in Carson Valley
John Louie, Robert Abbott,
Matthew Clark, James B. Scott, and Weston Thelen
Nevada Seismological Lab, University of
Nevada, Reno
Project resources:
Reflection profile recorded near the center of Carson Valley, interpreted on the right. This unmigrated stacked section is plotted at 1:1 vertical exaggeration, for the velocities found by NMO analysis. The interpretation (red lines) identifies three west-dipping reflections as deep as 1000 m. Their dip increases with depth and age. The red text at the left gives the depth, stacking velocity, and dip interpreted for each reflection. Each reflection interpreted appears to be the top of a sequence of continuously layered sediments, probably lacustrine in origin, with the layering becoming more discontinuous and more fluvial toward the bottom of the sequence. The circle identifies one such discontinuity within the second sequence down, probably a fluvial structure like a channel wall, fan, or levee. Loss of fold near the ends of this very short, 720-meter profile allows interpretation only within its middle. We thank Bently Nevada Farms for access to their property.
Complete Bouguer gravity anomaly contour map integrating previous measurements
with those taken by Robert Abbott in 2000-2001 and by Matthew Clark and James B. Scott
in 2002.
Interpretation of stacked seismic section together with Talwani gravity inversion for
basin depth, along the Genoa profile. Highly vertically exaggerated.
Talwani inversion for basin-depth sections for both the Genoa and Sunrise Pass profiles.
