Geometric model for Neogene crustal rotations in southern California

Shelf evolution along a transpressive transform margin, Santa Barbara Channel, California

“…1). The combination of Neogene transform motion and block rotation Luyen dyk, 1979, 1985;Luyendyk et al, 1980;Hornafius et al, 1986;Nicholson et al, 1994) is responsible for the anomalous east-west structural trend of the Santa Barbara Channel region relative to the dominant northwest trend of most structures and bathymetric features in the offshore Southern California Borderland to the south and the central California continental margin to the north (Fig. 1).…”

“…These data, acquired using the SIG 2Mille minisparker (https:// www .marine -seismic -equipments .net/) and the EdgeTech 512 chirp (https:// www .edgetech .com /products /sub -bottom -profiling/), can resolve geologic features a few tens of centimeters to meters thick down to subbottom depths of as much as 300 m under optimal geologic conditions. Our work also incorporates USGS seismic reflection data collected in 1973 (Vedder, 1975), 1980and 1981(Burdick and Richmond, 1982, and 2002 (Normark et al, 2003). The quality of data from all surveys is variable, locally poor due to structural complexity (e.g., steep bedding-plane dips), and the common presence of gas (Hovland and Judd, 1988;Fader, 1997).…”

Tectonics of strike-slip restraining and releasing bends

“…Jackson & Molnar 1990). Thus, the progressive evolution of a fault bend may involve local vertical axis rotations within the bend, and vertical axis rotations in the larger region that the bend occurs within (Luyendyk et al 1980;Westaway 1995;Cowgill et al 2004b). This may be indicated by changes in strike trends, and can be proven palaeomagnetically (Luyendyk et al 1985).…”

Orientations of palaeotectonic features as a key to understanding the neotectonic block rotation of the Kocaeli peninsula, NW Turkey

“…This idea was applied to several areas under the control of strike-slip tectonics (e.g. Freund 1970Freund , 1971Garfunkel 1974Garfunkel , 1989Luyendyk et al 1980;Nur et al 1989;Marra 2001;Kim et al 2003;Guarnieri 2004), and along the NAFZ in northern Turkey (e.g. Şengö r et al 1985;Tatar et al 1995;Bozkurt and Koçyigit 1996;Dhont et al 1998;İşseven and Tü ysü z 2006;Kaymakçı et al 2007).…”