Geologic Map and Structural Development of the Northernmost Sur‑Nacimiento Fault Zone, Central California Coast GEOSPHERE; V
Research Paper GEOSPHERE Geologic map and structural development of the northernmost Sur‑Nacimiento fault zone, central California coast GEOSPHERE; v. 15, no. 1 Scott M. Johnston1, John S. Singleton2, Alan D. Chapman3, and Gabriella Murray1 https://doi.org/10.1130/GES02015.1 1Physics Department, California Polytechnic State University, San Luis Obispo, California 93407, USA 2Department of Geosciences, Colorado State University, Fort Collins, Colorado 80523, USA 3 8 figures; 1 set of supplemental files Geology Department, Macalester College, St. Paul, Minnesota 55105, USA CORRESPONDENCE: scjohnst@ calpoly .edu ABSTRACT fault’s early slip evolution with respect to the juxtaposition of the Salinian and CITATION: Johnston, S.M., Singleton, J.S., Chap- Nacimiento blocks, as well as the potential that dextral reactivation of the man, A.D., and Murray, G., 2019, Geologic map and structural development of the northernmost The Sur-Nacimiento fault exposed along the central California coast Sur-Nacimiento fault may partially accommodate differential displacement Sur- Nacimiento fault zone, central California coast: (United States) juxtaposes the Salinian block arc against the Nacimiento block along the San Gregorio–Hosgri fault. Geosphere, v. 15, no. 1, p. 171–187, https:// doi .org accretionary complex, cuts out the majority of the forearc basin and west- /10 .1130 /GES02015.1. ern arc, and requires a minimum of 150 km of orogen-normal crustal excision within the Mesozoic California convergent margin. Despite this significant INTRODUCTION Science Editor: Shanaka de Silva Associate Editor: Terry L. Pavlis strain, the kinematic evolution of the Sur-Nacimiento fault remains poorly understood, with diverse hypotheses suggesting sinistral, dextral, thrust, or Accretionary complex–forearc basin–magmatic arc triads preserved in an- Received 30 May 2018 normal displacement along the fault.
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