Baja California and the Sea of Cortez 1. Tijuana Ensenada San Quintin El Rosario Guerrero Negro Bahia Magdalena Cabo San Lucas La Paz Bahia Concepcion.

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Presentation transcript:

Baja California and the Sea of Cortez 1

Tijuana Ensenada San Quintin El Rosario Guerrero Negro Bahia Magdalena Cabo San Lucas La Paz Bahia Concepcion Mulege Santa Rosalia Bahia de Los Angeles San Felipe 2

Geology of Baja California 3

Pacific Plate moves NW past N. American Plate San Andreas fault between 4

Murphy, 1983 as quoted in Grismer, unpublished tropics Early Miocene: Part of shore or underwater Some mountains as islands 5

Murphy, 1983 as quoted in Grismer, unpublished tropics Middle Miocene: Mountains rose Mainland subsided Gulf began to form S. peninsula separated from mainland, became island 6

Murphy, 1983 as quoted in Grismer, unpublished tropics Late Miocene: Mountain chains connected, forming a contiguous peninsula 7

Murphy, 1983 as quoted in Grismer, unpublished tropics Miocene-Pliocene: Rapid tectonic activity Pacific plate moved north Mountains rose more Sea level rose, isolating south end Gulf extended far north 8

Murphy, 1983 as quoted in Grismer, unpublished tropics Late Pliocene-Present: Mountain uplift Desertification Gulf regressed Temporary land bridges to islands 9

History of Baja California 10

Cortez Gúzman Mendoza 1532 Becerra 1533 Cortez

English map

English map

Cabrillo 1542 Mendoza galleons 1542 Francis Drake 1578 Cavendish 1586 Vizcaino 1596 Vizcaino