1
Captions for Supplemental Figures:
2
Figure S1: Close-up of 16 m grid of seafloor bathymetry on the Shelf Projection and northwest San Pedro
3
Escarpment, data from Dartnell and Gardner [1999]. Labeled areas of outcrop are middle and late Miocene
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Monterey Formation dated from sea floor samples in Nardin and Henyey [1978]. Labeled anticlines on the
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basin floor (west) are associated with the right-lateral San Pedro Basin fault (not shown). Gray curves are
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crests of anticlines mapped from seismic profiles (solid where unambiguously correlated, dashed where
7
less certain). The trends of the anticlines are more E-W than the trend of the Palos Verdes anticlinorium.
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Wells #7 through #10 are located. Information about these wells is in the Supplementary Appendix 1.
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Cross section A-A’ (Figure 3A), G-G’ (Figure S2) and H-H’ (Figure 6) are located.
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Figure S2 U.S. Geological Survey seismic reflection profile G-G' across part of the southwest
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limb of the Palos Verdes anticlinorium, with corresponding 1:1 depth section; located on
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Figures 1A, 1D, S1. The San Pedro Basin fault is right-lateral, and offsets the Santa Monica Bay
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fault. The normal separation exhibited by the shallow part of the Santa Monica Bay blind fault
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is related to a releasing double bend of the San Pedro Basin fault southeast of this profile. Data
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from Sliter et al., [2005].
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18
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Figure S3: Migrated multichannel seismic reflection profile provided by Western Geophysical,
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located in Figures 1A, 1D. Progressive tilting of the Pliocene section is consistent with
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displacement gradient models for broad forelimbs [Wickham, 1995]. The reflection character of
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the post-Repetto basin sediments is consistent with the rapidly-deposited turbidites [e.g.,
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Normark et al., 2006]. The inset images progressively steeper unconformities with depth within
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the turbidites (paired yellow arrows). The interval above the youngest unconformity is
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correlated to ODP site 1015, and so is younger than ~50 ka. An example 2 mm/yr. depositional
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rate would mean that the entire fill (above the deepest paired yellow arrows) would post-date
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200 ka and ongoing tilting would be subtle. This fill is not present in the hanging-wall of the
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northeastern (yellow) strand of the San Pedro Escarpment faults, so there is no simple way to
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detect ongoing tilting there.
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1
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Figure S4: Figure S4: Depth -converted migrated Western Geophysical profile M-M’, located on Figures
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1A, 1D. Displayed with no vertical exaggeration, the anticlinorium is broad and gentle. The thickest
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interval between Catalina Schist and base Repetto is along the crest of the anticline above the Palos
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Verdes fault; this is an inverted basin. San Pedro Basin fault is just beyond left edge; Palos Verdes fault is
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labeled as PVF. The labeled “Repettian”, “Delmontian” and “Mohnian” are outcrop of Pliocene to
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middle Miocene benthic foraminiferal stages as sampled in this area by Nardin and Henyey [1978](Figure
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1A).
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2
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Supplemental Figures
Figure S1: Close-up of 16 m grid of seafloor bathymetry on the Shelf Projection and northwest San Pedro
Escarpment, data from Dartnell and Gardner [1999]. Labeled areas of outcrop are middle and late Miocene
Monterey Formation dated from sea floor samples in Nardin and Henyey [1978]. Labeled anticlines on the
basin floor (west) are associated with the right-lateral San Pedro Basin fault (not shown). Gray curves are
crests of anticlines mapped from seismic profiles (solid where unambiguously correlated, dashed where
less certain). The trends of the anticlines are more E-W than the trend of the Palos Verdes anticlinorium.
Wells #7 through #10 are located. Information about these wells is in the Supplementary Appendix 1.
Cross section A-A’ (Figure 3A), G-G’ (Figure S2) and H-H’ (Figure 6) are located.
3
Figure S2 U.S. Geological Survey seismic reflection profile G-G' across part of the southwest limb of the
Palos Verdes anticlinorium, with corresponding 1:1 depth section; located on Figures 1A, 1D, S1. The San
Pedro Basin fault is right-lateral, and offsets the Santa Monica Bay fault. The normal separation exhibited
by the shallow part of the Santa Monica Bay blind fault is related to a releasing double bend of the San
Pedro Basin fault southeast of this profile. Data from Sliter et al., [2005].
4
Figure S3: Migrated multichannel seismic reflection profile provided by Western Geophysical, located in
Figures 1A, 1D. Progressive tilting of the Pliocene section is consistent with displacement gradient
models for broad forelimbs [Wickham, 1995]. The reflection character of the post-Hueneme unconformity
basin sediments is consistent with the rapidly-deposited turbidites [e.g., Normark et al., 2006]. The inset
images progressively steeper unconformities with depth within the turbidites (paired yellow arrows).
The Hueneme unconformity is as young as 125 ka in this area, and strata just below the Pico
unconformity may be as old as 1000 ka. An example 2 mm/yr depositional rate here, slower than at ODP
site 1015 to the west, would mean that the entire fill (above the deepest paired yellow arrows) would
post-date 200 ka and ongoing tilting would be subtle. This fill is not present in the hanging-wall of the
5
northeastern (yellow) strand of the San Pedro Escarpment faults, so there is no simple way to detect
ongoing tilting there.
Figure S4: Depth -converted migrated Western Geophysical profile M-M’, located on Figures 1A, 1D.
Displayed with no vertical exaggeration, the anticlinorium is broad and gentle. The thickest interval
between Catalina Schist and base Repetto is along the crest of the anticline above the Palos Verdes fault;
this is an inverted basin. San Pedro Basin fault is just beyond left edge; Palos Verdes fault is labeled as
PVF. The labeled “Repettian”, “Delmontian” and “Mohnian” are outcrop of Pliocene to middle Miocene
benthic foraminiferal stages as sampled in this area by Nardin and Henyey [1978](Figure 1A).
6