Peninsular Ranges Batholith, Baja California and Southern California

The zoned Ramona plutonic complex: An Early Cretaceous mid- to upper-crustal intrusive sequence, Peninsular Ranges batholith, southern California
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Published:January 01, 2014
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CiteCitation
Victoria R. Todd, Janis L. Hernandez, Lawrence L. Busch, 2014. "The zoned Ramona plutonic complex: An Early Cretaceous mid- to upper-crustal intrusive sequence, Peninsular Ranges batholith, southern California", Peninsular Ranges Batholith, Baja California and Southern California, Douglas M. Morton, Fred K. Miller
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The Early Cretaceous Ramona plutonic complex is an elliptical-in-plan structure that intruded the mid- to upper crust of the western zone of the Peninsular Ranges batholith. The complex is composed of a dozen concentrically arranged silicic to intermediate plutons with minor gabbro. Lithologically, these plutons represent six regional plutonic suites, each of which consists of multiple plutons in this part of the batholith. Seven new U-Pb zircon ages indicate that plutons are younger toward the center of the complex, from an age possibly as old as ca. 115 Ma to ca. 101 Ma. The composition of the Ramona plutonic complex...
- accretion
- California
- continental margin
- Cretaceous
- crust
- deformation
- diorites
- ductile deformation
- emplacement
- foliation
- granites
- igneous rocks
- intrusions
- Lower Cretaceous
- magmatism
- Mesozoic
- metamorphic rocks
- metamorphism
- metavolcanic rocks
- middle crust
- North America
- Peninsular Ranges Batholith
- plutonic rocks
- plutons
- San Diego County California
- Southern California
- suture zones
- tectonics
- tonalite
- U/Pb
- United States
- upper crust
- Julian Schist
- Ramona Complex